Seoul weather in August
In August, Seoul sees average daytime highs of 29°C and overnight lows near 22°C, with 258 mm of rain across 15.2 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.
Highs ease over the month, from about 30°C in the first days to 28°C by the end. The sky is clear or mostly clear about 27% of the time in August, and the air most often feels oppressive.
Daylight stretches from about 14 hours at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Seoul's 11th-clearest and 10th-windiest month. For the whole year in context, see Seoul's year-round climate.
- Daytime high
- 29°
- 1st warmest
- Overnight low
- 22°
- 12th coldest
- Rainfall
- 258 mm
- 15.2 wet days
- Daylight
- 13 h 30 min
- 5:52 AM – 7:20 PM
- Cloud cover
- 65%
- 11th clearest
- Wind
- 8 km/h
- 10th windiest
- Solar energy
- 4.34 kWh/m²
- Travel score
- 4.8
- out of 10
Seoul is capital and largest city of South Korea.
- Air quality
- Elevated
- PM2.5 21 µg/m³ · 2020
- Density
- 17,099/km²
- people per km²
- Founded
- 1395
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in August
Highs ease over the month, from about 30°C in the first days to 28°C by the end.
A typical August day in Seoul reaches about 29°C in the afternoon and slips back to 22°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 33°C. Set against its neighbours, August runs on par with July and about 4°C 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 (°C) | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 30 | 23 |
| 2 | 30 | 23 |
| 3 | 30 | 23 |
| 4 | 30 | 23 |
| 5 | 30 | 23 |
| 6 | 30 | 23 |
| 7 | 30 | 23 |
| 8 | 30 | 23 |
| 9 | 30 | 23 |
| 10 | 30 | 23 |
| 11 | 30 | 23 |
| 12 | 30 | 23 |
| 13 | 30 | 23 |
| 14 | 30 | 23 |
| 15 | 30 | 23 |
| 16 | 29 | 23 |
| 17 | 29 | 22 |
| 18 | 29 | 22 |
| 19 | 29 | 22 |
| 20 | 29 | 22 |
| 21 | 29 | 22 |
| 22 | 29 | 22 |
| 23 | 29 | 21 |
| 24 | 28 | 21 |
| 25 | 28 | 21 |
| 26 | 28 | 21 |
| 27 | 28 | 21 |
| 28 | 28 | 21 |
| 29 | 28 | 20 |
| 30 | 28 | 20 |
| 31 | 28 | 20 |
How August really feels in Seoul
Once humidity and wind are folded in, August averages 18 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Seoul weather by month
How August compares with the rest of the year at a glance. August is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 2° / -7° | 20 | 3.6 | 2.2 | 9.7 | 0.0 |
| Feb | 5° / -5° | 25 | 4 | 1.8 | 10.6 | 0.3 |
| Mar | 11° / 0° | 38 | 6.2 | 1 | 11.7 | 2.9 |
| Apr | 18° / 6° | 70 | 7.3 | 0 | 12.9 | 6.0 |
| May | 23° / 12° | 96 | 7.7 | 0 | 14 | 7.2 |
| Jun | 27° / 18° | 126 | 8.8 | 0 | 14.5 | 6.6 |
| Jul | 28° / 22° | 314 | 16.5 | 0 | 14.3 | 4.8 |
| Aug | 29° / 22° | 258 | 15.2 | 0 | 13.4 | 4.8 |
| Sep | 26° / 17° | 124 | 7.6 | 0 | 12.3 | 7.1 |
| Oct | 20° / 9° | 55 | 5.3 | 0 | 11 | 7.1 |
| Nov | 12° / 2° | 47 | 7.1 | 0.4 | 10 | 3.3 |
| Dec | 4° / -5° | 23 | 4.8 | 1.5 | 9.5 | 0.1 |
Cloud cover in August
The sky is clear or mostly clear about 27% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 16% of August, with mostly cloudy or overcast conditions the remaining 58%.
| 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 (%) | 42 | 42 | 43 | 43 | 43 | 43 | 43 | 42 | 43 | 42 | 42 | 42 | 41 | 42 | 41 | 41 | 41 | 41 | 41 | 40 | 40 | 41 | 41 | 41 | 41 | 42 | 43 | 43 | 44 | 44 | 46 |
| Cloudier (%) | 58 | 58 | 57 | 57 | 57 | 57 | 57 | 58 | 57 | 58 | 58 | 58 | 59 | 58 | 59 | 59 | 59 | 59 | 59 | 60 | 60 | 59 | 59 | 59 | 59 | 58 | 57 | 57 | 56 | 56 | 54 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 42 | 58 |
| 2 | 42 | 58 |
| 3 | 43 | 57 |
| 4 | 43 | 57 |
| 5 | 43 | 57 |
| 6 | 43 | 57 |
| 7 | 43 | 57 |
| 8 | 42 | 58 |
| 9 | 43 | 57 |
| 10 | 42 | 58 |
| 11 | 42 | 58 |
| 12 | 42 | 58 |
| 13 | 41 | 59 |
| 14 | 42 | 58 |
| 15 | 41 | 59 |
| 16 | 41 | 59 |
| 17 | 41 | 59 |
| 18 | 41 | 59 |
| 19 | 41 | 59 |
| 20 | 40 | 60 |
| 21 | 40 | 60 |
| 22 | 41 | 59 |
| 23 | 41 | 59 |
| 24 | 41 | 59 |
| 25 | 41 | 59 |
| 26 | 42 | 58 |
| 27 | 43 | 57 |
| 28 | 43 | 57 |
| 29 | 44 | 56 |
| 30 | 44 | 56 |
| 31 | 46 | 54 |
Chance of precipitation in August
Seoul gets around 258 mm of rain over 15.2 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 48% and peaks near 55% on the wettest days. The odds ease toward the end of the month.
| 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 (%) | 55 | 55 | 55 | 54 | 54 | 54 | 53 | 53 | 52 | 51 | 51 | 50 | 50 | 49 | 49 | 48 | 48 | 47 | 47 | 47 | 46 | 46 | 46 | 45 | 45 | 44 | 43 | 42 | 41 | 40 | 39 |
| Rain chance (%) | |
|---|---|
| 1 | 55 |
| 2 | 55 |
| 3 | 55 |
| 4 | 54 |
| 5 | 54 |
| 6 | 54 |
| 7 | 53 |
| 8 | 53 |
| 9 | 52 |
| 10 | 51 |
| 11 | 51 |
| 12 | 50 |
| 13 | 50 |
| 14 | 49 |
| 15 | 49 |
| 16 | 48 |
| 17 | 48 |
| 18 | 47 |
| 19 | 47 |
| 20 | 47 |
| 21 | 46 |
| 22 | 46 |
| 23 | 46 |
| 24 | 45 |
| 25 | 45 |
| 26 | 44 |
| 27 | 43 |
| 28 | 42 |
| 29 | 41 |
| 30 | 40 |
| 31 | 39 |
Humidity in August
Most of August feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the oppressive band about 45% of days. Sticky, muggy-or-worse air turns up on roughly 91% 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 (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 6 | 7 |
| Humid (%) | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 14 | 15 | 16 | 18 | 19 | 21 | 22 |
| Muggy (%) | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 14 | 14 | 15 | 16 | 18 | 19 | 21 | 22 | 24 | 25 | 27 | 29 | 30 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 39 | 39 | 39 |
| Oppressive (%) | 56 | 55 | 54 | 53 | 52 | 52 | 51 | 50 | 51 | 50 | 49 | 49 | 49 | 49 | 48 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 38 | 37 | 35 | 34 | 32 | 30 | 28 |
| Miserable (%) | 31 | 32 | 33 | 34 | 34 | 34 | 34 | 34 | 33 | 32 | 31 | 29 | 28 | 26 | 24 | 23 | 21 | 19 | 18 | 16 | 14 | 12 | 11 | 9 | 8 | 7 | 6 | 5 | 4 | 4 | 3 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 0 | 0 | 1 | 12 | 56 | 31 |
| 2 | 0 | 0 | 1 | 12 | 55 | 32 |
| 3 | 0 | 0 | 1 | 12 | 54 | 33 |
| 4 | 0 | 0 | 1 | 12 | 53 | 34 |
| 5 | 0 | 0 | 2 | 12 | 52 | 34 |
| 6 | 0 | 0 | 2 | 12 | 52 | 34 |
| 7 | 0 | 0 | 2 | 13 | 51 | 34 |
| 8 | 0 | 0 | 2 | 14 | 50 | 34 |
| 9 | 0 | 0 | 2 | 14 | 51 | 33 |
| 10 | 0 | 0 | 3 | 15 | 50 | 32 |
| 11 | 0 | 0 | 3 | 16 | 49 | 31 |
| 12 | 0 | 0 | 3 | 18 | 49 | 29 |
| 13 | 0 | 1 | 3 | 19 | 49 | 28 |
| 14 | 0 | 1 | 4 | 21 | 49 | 26 |
| 15 | 0 | 1 | 4 | 22 | 48 | 24 |
| 16 | 0 | 1 | 5 | 24 | 48 | 23 |
| 17 | 0 | 1 | 5 | 25 | 47 | 21 |
| 18 | 0 | 1 | 6 | 27 | 46 | 19 |
| 19 | 0 | 1 | 7 | 29 | 45 | 18 |
| 20 | 0 | 2 | 8 | 30 | 44 | 16 |
| 21 | 0 | 2 | 9 | 32 | 43 | 14 |
| 22 | 0 | 2 | 10 | 33 | 42 | 12 |
| 23 | 0 | 2 | 11 | 34 | 41 | 11 |
| 24 | 1 | 2 | 12 | 35 | 40 | 9 |
| 25 | 1 | 3 | 14 | 36 | 38 | 8 |
| 26 | 1 | 3 | 15 | 37 | 37 | 7 |
| 27 | 1 | 4 | 16 | 38 | 35 | 6 |
| 28 | 1 | 4 | 18 | 39 | 34 | 5 |
| 29 | 1 | 5 | 19 | 39 | 32 | 4 |
| 30 | 1 | 6 | 21 | 39 | 30 | 4 |
| 31 | 1 | 7 | 22 | 39 | 28 | 3 |
Wind in August
Winds average 8 km/h in August.
Across August, daily wind ranges from about 8 km/h on the calmest days to 9 km/h 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 (km/h) | 9 | 9 | 9 | 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 | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 9 | calm |
| 2 | 9 | calm |
| 3 | 9 | calm |
| 4 | 8 | calm |
| 5 | 8 | calm |
| 6 | 8 | calm |
| 7 | 8 | calm |
| 8 | 8 | calm |
| 9 | 8 | calm |
| 10 | 8 | calm |
| 11 | 8 | calm |
| 12 | 8 | calm |
| 13 | 8 | calm |
| 14 | 8 | calm |
| 15 | 8 | calm |
| 16 | 8 | calm |
| 17 | 8 | calm |
| 18 | 8 | calm |
| 19 | 8 | calm |
| 20 | 8 | calm |
| 21 | 8 | calm |
| 22 | 8 | calm |
| 23 | 8 | calm |
| 24 | 8 | calm |
| 25 | 8 | calm |
| 26 | 8 | calm |
| 27 | 8 | calm |
| 28 | 8 | calm |
| 29 | 8 | calm |
| 30 | 8 | calm |
| 31 | 8 | calm |
Sunrise & sunset in August
Daylight runs from about 14 hours at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 66 minutes over August. Sunrise moves from 5:39 AM to 6:05 AM, and sunset from 7:37 PM to 6:59 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) | 14.0 | 13.9 | 13.9 | 13.9 | 13.8 | 13.8 | 13.8 | 13.7 | 13.7 | 13.7 | 13.6 | 13.6 | 13.6 | 13.5 | 13.5 | 13.5 | 13.4 | 13.4 | 13.3 | 13.3 | 13.3 | 13.2 | 13.2 | 13.2 | 13.1 | 13.1 | 13.0 | 13.0 | 13.0 | 12.9 | 12.9 |
| Sunrise (AM) | 5:39 | 5:40 | 5:41 | 5:42 | 5:43 | 5:44 | 5:45 | 5:45 | 5:46 | 5:47 | 5:48 | 5:49 | 5:50 | 5:51 | 5:52 | 5:52 | 5:53 | 5:54 | 5:55 | 5:56 | 5:57 | 5:58 | 5:59 | 5:59 | 6:00 | 6:01 | 6:02 | 6:03 | 6:04 | 6:05 | 6:05 |
| Sunset (PM) | 7:37 | 7:36 | 7:35 | 7:34 | 7:33 | 7:32 | 7:31 | 7:30 | 7:28 | 7:27 | 7:26 | 7:25 | 7:24 | 7:22 | 7:21 | 7:20 | 7:19 | 7:17 | 7:16 | 7:15 | 7:13 | 7:12 | 7:10 | 7:09 | 7:08 | 7:06 | 7:05 | 7:03 | 7:02 | 7:00 | 6:59 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.0 | 5:39 | 7:37 |
| 2 | 13.9 | 5:40 | 7:36 |
| 3 | 13.9 | 5:41 | 7:35 |
| 4 | 13.9 | 5:42 | 7:34 |
| 5 | 13.8 | 5:43 | 7:33 |
| 6 | 13.8 | 5:44 | 7:32 |
| 7 | 13.8 | 5:45 | 7:31 |
| 8 | 13.7 | 5:45 | 7:30 |
| 9 | 13.7 | 5:46 | 7:28 |
| 10 | 13.7 | 5:47 | 7:27 |
| 11 | 13.6 | 5:48 | 7:26 |
| 12 | 13.6 | 5:49 | 7:25 |
| 13 | 13.6 | 5:50 | 7:24 |
| 14 | 13.5 | 5:51 | 7:22 |
| 15 | 13.5 | 5:52 | 7:21 |
| 16 | 13.5 | 5:52 | 7:20 |
| 17 | 13.4 | 5:53 | 7:19 |
| 18 | 13.4 | 5:54 | 7:17 |
| 19 | 13.3 | 5:55 | 7:16 |
| 20 | 13.3 | 5:56 | 7:15 |
| 21 | 13.3 | 5:57 | 7:13 |
| 22 | 13.2 | 5:58 | 7:12 |
| 23 | 13.2 | 5:59 | 7:10 |
| 24 | 13.2 | 5:59 | 7:09 |
| 25 | 13.1 | 6:00 | 7:08 |
| 26 | 13.1 | 6:01 | 7:06 |
| 27 | 13.0 | 6:02 | 7:05 |
| 28 | 13.0 | 6:03 | 7:03 |
| 29 | 13.0 | 6:04 | 7:02 |
| 30 | 12.9 | 6:05 | 7:00 |
| 31 | 12.9 | 6:05 | 6:59 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 4.34 kWh/m².
For context, solar energy here swings from a low near 2.35 kWh/m² to a high of 5.79 kWh/m² in May across the year — August's 4.34 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) | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.2 | 4.2 | 4.2 | 4.2 | 4.3 | 4.3 |
| 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 | 4.4 | Bright |
| 2 | 4.4 | Bright |
| 3 | 4.4 | Bright |
| 4 | 4.4 | Bright |
| 5 | 4.4 | Bright |
| 6 | 4.4 | Bright |
| 7 | 4.4 | Bright |
| 8 | 4.4 | Bright |
| 9 | 4.4 | Bright |
| 10 | 4.4 | Bright |
| 11 | 4.4 | Bright |
| 12 | 4.4 | Bright |
| 13 | 4.4 | Bright |
| 14 | 4.4 | Bright |
| 15 | 4.4 | Bright |
| 16 | 4.3 | Bright |
| 17 | 4.3 | Bright |
| 18 | 4.3 | Bright |
| 19 | 4.3 | Bright |
| 20 | 4.3 | Bright |
| 21 | 4.3 | Bright |
| 22 | 4.3 | Bright |
| 23 | 4.3 | Bright |
| 24 | 4.3 | Bright |
| 25 | 4.3 | Bright |
| 26 | 4.2 | Bright |
| 27 | 4.2 | Bright |
| 28 | 4.2 | Bright |
| 29 | 4.2 | Bright |
| 30 | 4.3 | Bright |
| 31 | 4.3 | Bright |
Hazard calendar for Seoul
In August, Seoul sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.
Seoul sits in the Pacific typhoon belt; the season peaks July–October.
Seoul's rainy season runs July–August, when most of the year's rain falls.
Is August a good time to visit Seoul?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is a reasonable time to visit Seoul for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Seoul in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Seoul sees daytime highs around 29°C and nights near 22°C. Pack light clothes and rain gear. About 15 days see rain.
Sea temperature near Seoul in August
The nearest coast averages about 24°C 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 38 km away) is warmest in August at about 24°C and coldest in February near 4°C.
It's comfortable for a long swim from Jul 11 to Oct 13 — about 3.1 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 6 | 4 | 5 | 8 | 12 | 17 | 21 | 24 | 23 | 20 | 15 | 10 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 6 | Bracing |
| Feb | 4 | Bracing |
| Mar | 5 | Bracing |
| Apr | 8 | Bracing |
| May | 12 | Bracing |
| Jun | 17 | Cool |
| Jul | 21 | Refreshing |
| Aug | 24 | Refreshing |
| Sep | 23 | Refreshing |
| Oct | 20 | Cool |
| Nov | 15 | Bracing |
| Dec | 10 | Bracing |
UV index in Seoul in August
Clear-sky midday UV in August peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Seoul peaks around July 22 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 23 at about 2 (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 | 4 | 6 | 5 | 7 | 8 | 8 | 7 | 5 | 3 | 2 |
| Level | Low | Moderate | Moderate | High | High | High | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 5 | High |
| Jun | 7 | High |
| Jul | 8 | Very high |
| Aug | 8 | Very high |
| Sep | 7 | High |
| Oct | 5 | Moderate |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Air quality in Seoul 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 Seoul is worst in March — around 27 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (August, 14 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Seoul's WHO annual average of 21 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 25 | 25 | 27 | 22 | 19 | 17 | 15 | 14 | 19 | 23 | 24 | 23 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 25 | Moderate |
| Feb | 25 | Moderate |
| Mar | 27 | Moderate |
| Apr | 22 | Moderate |
| May | 19 | Moderate |
| Jun | 17 | Moderate |
| Jul | 15 | Moderate |
| Aug | 14 | Moderate |
| Sep | 19 | Moderate |
| Oct | 23 | Moderate |
| Nov | 24 | Moderate |
| Dec | 23 | Moderate |
Where is Seoul?
Seoul sits at 37.6°N, 127.0°E, 38 m above sea level, in South Korea. The nearest listed city is Gwangmyeong, 14 km away.
Topography around Seoul
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Seoul.
Within 3 km, the terrain around Seoul has significant variations in elevation — a maximum elevation change of 302 m around an average of 71 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 777 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,443 m.
The land around Seoul is covered by artificial surfaces (69%) and trees (30%) within 3 km, artificial surfaces (51%) and trees (40%) within 16 km, and trees (48%) within 80 km.
South Korea travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / F
- 220 V · 60 Hz
- Prices
- ≈ 57% of US
- price level, 2025
- GDP per capita
- $36,227
- 2025
- Happiness
- 6.0 / 10
- World Happiness, 2025
- Safe drinking water
- 99%
- of population, 2024
- Homicide rate
- 0.5
- per 100k, 2023
- Road deaths
- 8.6
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 522
- 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 Seoul (37.566°, 126.9784°, elevation 38 m), 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).