East Setauket weather in August
In August, East Setauket sees average daytime highs of 78°F and overnight lows near 70°F, with 4.0 in of rain across 9.5 wet days and about 13.6 hours of daylight. It is the 2nd-warmest and 4th-wettest month of the year here.
Day-to-day highs hold fairly steady near 78°F through the month. The sky is clear or mostly clear about 39% of the time in August, and the air most often feels muggy.
Daylight stretches from about 14 h 12 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is East Setauket's 3rd-clearest and 12th-windiest month. For the whole year in context, see East Setauket's year-round climate.
- Daytime high
- 78°
- 2nd warmest
- Overnight low
- 70°
- 11th coldest
- Rainfall
- 4.0 in
- 9.5 wet days
- Daylight
- 13 h 36 min
- 5:07 AM – 6:46 PM
- Cloud cover
- 53%
- 3rd clearest
- Wind
- 8 mph
- 12th windiest
- Solar energy
- 5.57 kWh/m²
- Travel score
- 7.0
- out of 10
East Setauket is human settlement in Suffolk County, New York, United States of America.
- Density
- 1,080/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in August
Day-to-day highs hold fairly steady near 78°F through the month.
A typical August day in East Setauket reaches about 78°F in the afternoon and slips back to 70°F overnight — a 8°F spread between the day's warmth and the night's chill. On most days the high lands between 73°F and 83°F. Set against its neighbours, August runs on par with July and about 6°F warmer than September.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 79 | 79 | 79 | 79 | 79 | 79 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 76 | 76 | 76 | 76 | 76 | 76 |
| Avg low (°F) | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 68 | 68 | 68 | 68 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 79 | 71 |
| 2 | 79 | 71 |
| 3 | 79 | 71 |
| 4 | 79 | 71 |
| 5 | 79 | 71 |
| 6 | 79 | 71 |
| 7 | 78 | 71 |
| 8 | 78 | 71 |
| 9 | 78 | 71 |
| 10 | 78 | 71 |
| 11 | 78 | 71 |
| 12 | 78 | 70 |
| 13 | 78 | 70 |
| 14 | 78 | 70 |
| 15 | 78 | 70 |
| 16 | 78 | 70 |
| 17 | 78 | 70 |
| 18 | 77 | 70 |
| 19 | 77 | 70 |
| 20 | 77 | 69 |
| 21 | 77 | 69 |
| 22 | 77 | 69 |
| 23 | 77 | 69 |
| 24 | 77 | 69 |
| 25 | 77 | 69 |
| 26 | 76 | 69 |
| 27 | 76 | 69 |
| 28 | 76 | 68 |
| 29 | 76 | 68 |
| 30 | 76 | 68 |
| 31 | 76 | 68 |
How August really feels in East Setauket
Once humidity and wind are folded in, August averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
East Setauket weather by month
How August compares with the rest of the year at a glance. August is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 38° / 29° | 3.7 | 9.7 | 4.2 | 9.4 | 0.0 |
| Feb | 38° / 29° | 3.4 | 9.1 | 3.8 | 10.4 | 0.0 |
| Mar | 44° / 35° | 4.6 | 10.6 | 3.3 | 11.7 | 0.7 |
| Apr | 53° / 44° | 3.9 | 10.7 | 0.4 | 13.1 | 3.0 |
| May | 63° / 53° | 3.5 | 10.8 | 0 | 14.3 | 5.3 |
| Jun | 72° / 64° | 3.6 | 9.7 | 0 | 14.9 | 6.7 |
| Jul | 78° / 70° | 3.2 | 9.2 | 0 | 14.6 | 6.9 |
| Aug | 78° / 70° | 4.0 | 9.5 | 0 | 13.6 | 7.0 |
| Sep | 72° / 64° | 3.8 | 9.1 | 0 | 12.3 | 6.9 |
| Oct | 62° / 54° | 4.4 | 9.4 | 0.1 | 10.9 | 5.5 |
| Nov | 53° / 44° | 3.7 | 9.1 | 0.3 | 9.7 | 3.0 |
| Dec | 44° / 35° | 4.8 | 10.6 | 2.4 | 9.1 | 0.7 |
Cloud cover in August
The sky is clear or mostly clear about 39% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 17% of August, with mostly cloudy or overcast conditions the remaining 44%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 54 | 54 | 54 | 53 | 53 | 53 | 54 | 54 | 54 | 55 | 55 | 55 | 56 | 56 | 58 | 58 | 58 | 59 | 59 | 58 | 58 | 58 | 57 | 57 |
| Cloudier (%) | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 46 | 46 | 46 | 47 | 47 | 47 | 46 | 46 | 46 | 45 | 45 | 45 | 44 | 44 | 42 | 42 | 42 | 41 | 41 | 42 | 42 | 42 | 43 | 43 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 56 | 44 |
| 2 | 56 | 44 |
| 3 | 56 | 44 |
| 4 | 56 | 44 |
| 5 | 56 | 44 |
| 6 | 56 | 44 |
| 7 | 56 | 44 |
| 8 | 54 | 46 |
| 9 | 54 | 46 |
| 10 | 54 | 46 |
| 11 | 53 | 47 |
| 12 | 53 | 47 |
| 13 | 53 | 47 |
| 14 | 54 | 46 |
| 15 | 54 | 46 |
| 16 | 54 | 46 |
| 17 | 55 | 45 |
| 18 | 55 | 45 |
| 19 | 55 | 45 |
| 20 | 56 | 44 |
| 21 | 56 | 44 |
| 22 | 58 | 42 |
| 23 | 58 | 42 |
| 24 | 58 | 42 |
| 25 | 59 | 41 |
| 26 | 59 | 41 |
| 27 | 58 | 42 |
| 28 | 58 | 42 |
| 29 | 58 | 42 |
| 30 | 57 | 43 |
| 31 | 57 | 43 |
Chance of precipitation in August
East Setauket gets around 4.0 in of rain over 9.5 wet days in August. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 31% and peaks near 34% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 33 | 33 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 33 | 33 | 32 | 31 | 31 | 30 | 29 | 28 | 28 | 27 | 27 | 26 | 26 | 26 | 26 |
| Rain chance (%) | |
|---|---|
| 1 | 32 |
| 2 | 32 |
| 3 | 32 |
| 4 | 32 |
| 5 | 32 |
| 6 | 32 |
| 7 | 32 |
| 8 | 33 |
| 9 | 33 |
| 10 | 34 |
| 11 | 34 |
| 12 | 34 |
| 13 | 34 |
| 14 | 34 |
| 15 | 34 |
| 16 | 34 |
| 17 | 33 |
| 18 | 33 |
| 19 | 32 |
| 20 | 31 |
| 21 | 31 |
| 22 | 30 |
| 23 | 29 |
| 24 | 28 |
| 25 | 28 |
| 26 | 27 |
| 27 | 27 |
| 28 | 26 |
| 29 | 26 |
| 30 | 26 |
| 31 | 26 |
Humidity in August
Most of August feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the muggy band about 32% of days. Sticky, muggy-or-worse air turns up on roughly 56% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 8 | 8 | 9 | 9 | 10 | 10 |
| Comfortable (%) | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 14 | 14 | 15 | 15 | 16 | 16 | 17 | 17 | 18 | 18 | 19 | 19 | 19 | 19 |
| Humid (%) | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 25 | 25 | 26 | 26 | 26 | 27 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Muggy (%) | 35 | 34 | 34 | 34 | 34 | 33 | 33 | 33 | 33 | 33 | 33 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 33 | 32 | 32 | 31 | 30 | 30 | 29 | 29 | 28 | 28 | 28 |
| Oppressive (%) | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 27 | 27 | 26 | 25 | 25 | 24 | 23 | 22 | 21 | 21 | 20 | 19 | 19 | 18 | 17 | 17 | 16 | 15 | 15 | 15 | 14 | 14 |
| Miserable (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 2 | 11 | 22 | 35 | 30 | 1 |
| 2 | 2 | 11 | 22 | 34 | 30 | 1 |
| 3 | 2 | 12 | 22 | 34 | 29 | 1 |
| 4 | 2 | 12 | 22 | 34 | 29 | 1 |
| 5 | 3 | 12 | 22 | 34 | 29 | 1 |
| 6 | 3 | 12 | 22 | 33 | 29 | 1 |
| 7 | 3 | 12 | 23 | 33 | 29 | 1 |
| 8 | 3 | 12 | 23 | 33 | 28 | 1 |
| 9 | 3 | 12 | 23 | 33 | 28 | 1 |
| 10 | 3 | 12 | 23 | 33 | 27 | 1 |
| 11 | 4 | 12 | 23 | 33 | 27 | 1 |
| 12 | 4 | 12 | 23 | 34 | 26 | 1 |
| 13 | 4 | 12 | 24 | 34 | 25 | 1 |
| 14 | 4 | 13 | 24 | 34 | 25 | 1 |
| 15 | 4 | 13 | 24 | 34 | 24 | 1 |
| 16 | 4 | 13 | 25 | 34 | 23 | 1 |
| 17 | 4 | 13 | 25 | 34 | 22 | 1 |
| 18 | 5 | 14 | 26 | 34 | 21 | 1 |
| 19 | 5 | 14 | 26 | 34 | 21 | 0 |
| 20 | 5 | 15 | 26 | 34 | 20 | 0 |
| 21 | 5 | 15 | 27 | 33 | 19 | 0 |
| 22 | 6 | 16 | 28 | 32 | 19 | 0 |
| 23 | 6 | 16 | 28 | 32 | 18 | 0 |
| 24 | 6 | 17 | 29 | 31 | 17 | 0 |
| 25 | 7 | 17 | 29 | 30 | 17 | 0 |
| 26 | 8 | 18 | 29 | 30 | 16 | 0 |
| 27 | 8 | 18 | 29 | 29 | 15 | 0 |
| 28 | 9 | 19 | 29 | 29 | 15 | 0 |
| 29 | 9 | 19 | 29 | 28 | 15 | 0 |
| 30 | 10 | 19 | 29 | 28 | 14 | 0 |
| 31 | 10 | 19 | 29 | 28 | 14 | 0 |
Wind in August
Winds average 8 mph in August, the calmest month.
Across August, daily wind ranges from about 8 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 8 | light breeze |
| 2 | 8 | light breeze |
| 3 | 8 | light breeze |
| 4 | 8 | light breeze |
| 5 | 8 | light breeze |
| 6 | 8 | light breeze |
| 7 | 8 | light breeze |
| 8 | 8 | light breeze |
| 9 | 8 | light breeze |
| 10 | 8 | light breeze |
| 11 | 8 | light breeze |
| 12 | 8 | light breeze |
| 13 | 8 | light breeze |
| 14 | 8 | light breeze |
| 15 | 8 | light breeze |
| 16 | 8 | light breeze |
| 17 | 8 | light breeze |
| 18 | 8 | light breeze |
| 19 | 8 | light breeze |
| 20 | 8 | light breeze |
| 21 | 8 | light breeze |
| 22 | 8 | light breeze |
| 23 | 8 | light breeze |
| 24 | 8 | light breeze |
| 25 | 8 | light breeze |
| 26 | 8 | light breeze |
| 27 | 8 | light breeze |
| 28 | 8 | light breeze |
| 29 | 8 | light breeze |
| 30 | 8 | light breeze |
| 31 | 8 | light breeze |
Sunrise & sunset in August
Daylight runs from about 14 h 12 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 72 minutes over August. Sunrise moves from 4:52 AM to 5:22 AM, and sunset from 7:05 PM to 6:23 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 14.2 | 14.2 | 14.1 | 14.1 | 14.1 | 14.0 | 14.0 | 14.0 | 13.9 | 13.9 | 13.8 | 13.8 | 13.8 | 13.7 | 13.7 | 13.6 | 13.6 | 13.6 | 13.5 | 13.5 | 13.4 | 13.4 | 13.4 | 13.3 | 13.3 | 13.2 | 13.2 | 13.1 | 13.1 | 13.0 | 13.0 |
| Sunrise (AM) | 4:52 | 4:53 | 4:54 | 4:55 | 4:56 | 4:57 | 4:58 | 4:59 | 5:00 | 5:01 | 5:02 | 5:03 | 5:04 | 5:05 | 5:06 | 5:07 | 5:08 | 5:09 | 5:10 | 5:11 | 5:12 | 5:13 | 5:14 | 5:15 | 5:16 | 5:17 | 5:18 | 5:19 | 5:20 | 5:21 | 5:22 |
| Sunset (PM) | 7:05 | 7:04 | 7:03 | 7:02 | 7:00 | 6:59 | 6:58 | 6:57 | 6:55 | 6:54 | 6:53 | 6:52 | 6:50 | 6:49 | 6:47 | 6:46 | 6:45 | 6:43 | 6:42 | 6:40 | 6:39 | 6:37 | 6:35 | 6:34 | 6:32 | 6:31 | 6:29 | 6:27 | 6:26 | 6:24 | 6:23 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.2 | 4:52 | 7:05 |
| 2 | 14.2 | 4:53 | 7:04 |
| 3 | 14.1 | 4:54 | 7:03 |
| 4 | 14.1 | 4:55 | 7:02 |
| 5 | 14.1 | 4:56 | 7:00 |
| 6 | 14.0 | 4:57 | 6:59 |
| 7 | 14.0 | 4:58 | 6:58 |
| 8 | 14.0 | 4:59 | 6:57 |
| 9 | 13.9 | 5:00 | 6:55 |
| 10 | 13.9 | 5:01 | 6:54 |
| 11 | 13.8 | 5:02 | 6:53 |
| 12 | 13.8 | 5:03 | 6:52 |
| 13 | 13.8 | 5:04 | 6:50 |
| 14 | 13.7 | 5:05 | 6:49 |
| 15 | 13.7 | 5:06 | 6:47 |
| 16 | 13.6 | 5:07 | 6:46 |
| 17 | 13.6 | 5:08 | 6:45 |
| 18 | 13.6 | 5:09 | 6:43 |
| 19 | 13.5 | 5:10 | 6:42 |
| 20 | 13.5 | 5:11 | 6:40 |
| 21 | 13.4 | 5:12 | 6:39 |
| 22 | 13.4 | 5:13 | 6:37 |
| 23 | 13.4 | 5:14 | 6:35 |
| 24 | 13.3 | 5:15 | 6:34 |
| 25 | 13.3 | 5:16 | 6:32 |
| 26 | 13.2 | 5:17 | 6:31 |
| 27 | 13.2 | 5:18 | 6:29 |
| 28 | 13.1 | 5:19 | 6:27 |
| 29 | 13.1 | 5:20 | 6:26 |
| 30 | 13.0 | 5:21 | 6:24 |
| 31 | 13.0 | 5:22 | 6:23 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 5.57 kWh/m².
For context, solar energy here swings from a low near 1.74 kWh/m² to a high of 6.34 kWh/m² in June across the year — August's 5.57 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.9 | 5.9 | 5.9 | 5.9 | 5.8 | 5.8 | 5.8 | 5.8 | 5.7 | 5.7 | 5.7 | 5.6 | 5.6 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.4 | 5.4 | 5.4 | 5.4 | 5.3 | 5.3 | 5.3 | 5.3 | 5.2 | 5.2 | 5.2 | 5.1 | 5.1 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.9 | Bright |
| 2 | 5.9 | Bright |
| 3 | 5.9 | Bright |
| 4 | 5.9 | Bright |
| 5 | 5.8 | Bright |
| 6 | 5.8 | Bright |
| 7 | 5.8 | Bright |
| 8 | 5.8 | Bright |
| 9 | 5.7 | Bright |
| 10 | 5.7 | Bright |
| 11 | 5.7 | Bright |
| 12 | 5.6 | Bright |
| 13 | 5.6 | Bright |
| 14 | 5.5 | Bright |
| 15 | 5.5 | Bright |
| 16 | 5.5 | Bright |
| 17 | 5.5 | Bright |
| 18 | 5.5 | Bright |
| 19 | 5.4 | Bright |
| 20 | 5.4 | Bright |
| 21 | 5.4 | Bright |
| 22 | 5.4 | Bright |
| 23 | 5.3 | Bright |
| 24 | 5.3 | Bright |
| 25 | 5.3 | Bright |
| 26 | 5.3 | Bright |
| 27 | 5.2 | Bright |
| 28 | 5.2 | Bright |
| 29 | 5.2 | Bright |
| 30 | 5.1 | Bright |
| 31 | 5.1 | Bright |
Hazard calendar for East Setauket
In August, East Setauket sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.
East Setauket sits in the Atlantic hurricane belt; the season peaks August–October.
Is August a good time to visit East Setauket?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is one of the better times to visit East Setauket for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for East Setauket in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, East Setauket sees daytime highs around 78°F and nights near 70°F. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.
Sea temperature near East Setauket in August
The nearest coast averages about 74°F in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 12 mi away) is warmest in August at about 74°F and coldest in February near 35°F.
It's comfortable for a long swim from Jul 1 to Sep 30 — about 3 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 39 | 35 | 37 | 44 | 54 | 65 | 72 | 74 | 71 | 64 | 55 | 46 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 39 | Bracing |
| Feb | 35 | Bracing |
| Mar | 37 | Bracing |
| Apr | 44 | Bracing |
| May | 54 | Bracing |
| Jun | 65 | Cool |
| Jul | 72 | Refreshing |
| Aug | 74 | Refreshing |
| Sep | 71 | Refreshing |
| Oct | 64 | Cool |
| Nov | 55 | Bracing |
| Dec | 46 | Bracing |
UV index in East Setauket in August
Clear-sky midday UV in August peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in East Setauket peaks around July 11 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 6 | 7 | 8 | 8 | 6 | 6 | 3 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Very high | High | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| Apr | 6 | High |
| May | 7 | Very high |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 6 | High |
| Sep | 6 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Moderate |
| Dec | 1 | Low |
Air quality in East Setauket in August
Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.
Air quality in East Setauket is worst in July — around 20 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (November, 8 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 10 | 13 | 14 | 16 | 19 | 20 | 20 | 17 | 13 | 9 | 8 | 9 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 13 | Moderate |
| Mar | 14 | Moderate |
| Apr | 16 | Moderate |
| May | 19 | Moderate |
| Jun | 20 | Moderate |
| Jul | 20 | Moderate |
| Aug | 17 | Moderate |
| Sep | 13 | Moderate |
| Oct | 9 | Good |
| Nov | 8 | Good |
| Dec | 9 | Good |
Where is East Setauket?
East Setauket sits at 40.9°N, 73.1°W, 66 ft above sea level, in United States. The nearest listed city is Setauket-East Setauket, 0.6 mi away.
Topography around East Setauket
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of East Setauket.
Within 2 miles, the terrain around East Setauket has only modest variations in elevation — a maximum elevation change of 230 ft around an average of 82 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 338 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,457 ft.
The land around East Setauket is covered by trees (68%) within 2 miles, water (50%) and trees (39%) within 10 miles, and water (47%) and trees (41%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for East Setauket (40.9415°, -73.1059°, elevation 66 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).