Cascais weather in September
In September, Cascais sees average daytime highs of 19°C and overnight lows near 18°C, with 27 mm of rain across 3.8 wet days and about 12.3 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.
Day-to-day highs hold fairly steady near 19°C through the month. The sky is clear or mostly clear about 64% of the time in September, and the air most often feels humid.
Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Cascais's 4th-clearest and 12th-windiest month. For the whole year in context, see Cascais's year-round climate.
- Daytime high
- 19°
- 2nd warmest
- Overnight low
- 18°
- 11th coldest
- Rainfall
- 27 mm
- 3.8 wet days
- Daylight
- 12 h 12 min
- 6:25 AM – 6:39 PM
- Cloud cover
- 34%
- 4th clearest
- Wind
- 21 km/h
- 12th windiest
- Solar energy
- 5.27 kWh/m²
- Travel score
- 7.5
- out of 10
- Air quality
- Good
- PM10 23.1 µg/m³ · 2019
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Day-to-day highs hold fairly steady near 19°C through the month.
A typical September day in Cascais reaches about 19°C in the afternoon and slips back to 18°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 21°C. Set against its neighbours, September runs on par with August and on par with October.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 |
| Avg low (°C) | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 19 | 18 |
| 2 | 19 | 18 |
| 3 | 19 | 18 |
| 4 | 19 | 18 |
| 5 | 19 | 18 |
| 6 | 19 | 18 |
| 7 | 19 | 18 |
| 8 | 19 | 18 |
| 9 | 19 | 18 |
| 10 | 19 | 18 |
| 11 | 19 | 18 |
| 12 | 19 | 18 |
| 13 | 19 | 18 |
| 14 | 19 | 18 |
| 15 | 19 | 18 |
| 16 | 19 | 18 |
| 17 | 19 | 18 |
| 18 | 19 | 18 |
| 19 | 19 | 18 |
| 20 | 19 | 18 |
| 21 | 19 | 18 |
| 22 | 19 | 18 |
| 23 | 19 | 18 |
| 24 | 19 | 18 |
| 25 | 19 | 18 |
| 26 | 19 | 18 |
| 27 | 19 | 18 |
| 28 | 19 | 18 |
| 29 | 19 | 18 |
| 30 | 19 | 18 |
Cascais weather by month
How September compares with the rest of the year at a glance. September is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 14° / 12° | 81 | 10.2 | 9.6 | 4.3 |
| Feb | 14° / 12° | 60 | 8.2 | 10.5 | 4.3 |
| Mar | 15° / 13° | 56 | 8.1 | 11.7 | 4.7 |
| Apr | 15° / 14° | 50 | 7.8 | 13 | 5.1 |
| May | 17° / 15° | 40 | 5.4 | 14.1 | 6.1 |
| Jun | 18° / 17° | 8 | 1.8 | 14.7 | 7.5 |
| Jul | 19° / 18° | 2 | 0.6 | 14.4 | 8.2 |
| Aug | 19° / 18° | 4 | 0.8 | 13.5 | 8.2 |
| Sep | 19° / 18° | 27 | 3.8 | 12.3 | 7.5 |
| Oct | 19° / 17° | 80 | 9 | 11 | 6.3 |
| Nov | 17° / 15° | 95 | 10.6 | 9.9 | 5.3 |
| Dec | 15° / 13° | 89 | 10.6 | 9.3 | 4.6 |
Cloud cover in September
The sky is clear or mostly clear about 64% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 22%. Skies tend to cloud over as the month goes on.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 87 | 87 | 85 | 85 | 84 | 83 | 83 | 81 | 81 | 80 | 80 | 79 | 79 | 79 | 79 | 78 | 78 | 77 | 77 | 76 | 76 | 76 | 75 | 75 | 74 | 73 | 72 | 72 | 71 | 71 |
| Cloudier (%) | 13 | 13 | 15 | 15 | 16 | 17 | 17 | 19 | 19 | 20 | 20 | 21 | 21 | 21 | 21 | 22 | 22 | 23 | 23 | 24 | 24 | 24 | 25 | 25 | 26 | 27 | 28 | 28 | 29 | 29 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 87 | 13 |
| 2 | 87 | 13 |
| 3 | 85 | 15 |
| 4 | 85 | 15 |
| 5 | 84 | 16 |
| 6 | 83 | 17 |
| 7 | 83 | 17 |
| 8 | 81 | 19 |
| 9 | 81 | 19 |
| 10 | 80 | 20 |
| 11 | 80 | 20 |
| 12 | 79 | 21 |
| 13 | 79 | 21 |
| 14 | 79 | 21 |
| 15 | 79 | 21 |
| 16 | 78 | 22 |
| 17 | 78 | 22 |
| 18 | 77 | 23 |
| 19 | 77 | 23 |
| 20 | 76 | 24 |
| 21 | 76 | 24 |
| 22 | 76 | 24 |
| 23 | 75 | 25 |
| 24 | 75 | 25 |
| 25 | 74 | 26 |
| 26 | 73 | 27 |
| 27 | 72 | 28 |
| 28 | 72 | 28 |
| 29 | 71 | 29 |
| 30 | 71 | 29 |
Chance of precipitation in September
Cascais gets around 27 mm of rain over 3.8 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 12% and peaks near 18% on the wettest days. The odds climb 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 8 | 9 | 9 | 10 | 11 | 11 | 12 | 13 | 14 | 14 | 15 | 15 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 |
| Rain chance (%) | |
|---|---|
| 1 | 5 |
| 2 | 5 |
| 3 | 5 |
| 4 | 6 |
| 5 | 6 |
| 6 | 6 |
| 7 | 7 |
| 8 | 7 |
| 9 | 8 |
| 10 | 9 |
| 11 | 9 |
| 12 | 10 |
| 13 | 11 |
| 14 | 11 |
| 15 | 12 |
| 16 | 13 |
| 17 | 14 |
| 18 | 14 |
| 19 | 15 |
| 20 | 15 |
| 21 | 16 |
| 22 | 17 |
| 23 | 17 |
| 24 | 17 |
| 25 | 17 |
| 26 | 17 |
| 27 | 17 |
| 28 | 17 |
| 29 | 17 |
| 30 | 18 |
Humidity in September
Most of September feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the humid band about 61% of days. Sticky, muggy-or-worse air turns up on roughly 10% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 9 |
| Comfortable (%) | 17 | 17 | 17 | 18 | 19 | 19 | 20 | 20 | 21 | 21 | 22 | 23 | 24 | 25 | 25 | 26 | 27 | 28 | 28 | 28 | 29 | 29 | 30 | 30 | 31 | 31 | 32 | 33 | 33 | 34 |
| Humid (%) | 72 | 71 | 71 | 69 | 68 | 68 | 67 | 66 | 65 | 65 | 64 | 62 | 61 | 61 | 60 | 60 | 59 | 58 | 58 | 59 | 57 | 58 | 57 | 58 | 56 | 56 | 54 | 53 | 52 | 52 |
| Muggy (%) | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 10 | 10 | 9 | 9 | 8 | 8 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 5 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 0 | 17 | 72 | 11 |
| 2 | 0 | 17 | 71 | 12 |
| 3 | 0 | 17 | 71 | 12 |
| 4 | 1 | 18 | 69 | 12 |
| 5 | 1 | 19 | 68 | 12 |
| 6 | 1 | 19 | 68 | 12 |
| 7 | 1 | 20 | 67 | 12 |
| 8 | 2 | 20 | 66 | 12 |
| 9 | 2 | 21 | 65 | 12 |
| 10 | 2 | 21 | 65 | 12 |
| 11 | 2 | 22 | 64 | 12 |
| 12 | 3 | 23 | 62 | 12 |
| 13 | 3 | 24 | 61 | 12 |
| 14 | 3 | 25 | 61 | 11 |
| 15 | 4 | 25 | 60 | 11 |
| 16 | 4 | 26 | 60 | 10 |
| 17 | 4 | 27 | 59 | 10 |
| 18 | 5 | 28 | 58 | 9 |
| 19 | 5 | 28 | 58 | 9 |
| 20 | 5 | 28 | 59 | 8 |
| 21 | 6 | 29 | 57 | 8 |
| 22 | 6 | 29 | 58 | 7 |
| 23 | 6 | 30 | 57 | 7 |
| 24 | 6 | 30 | 58 | 6 |
| 25 | 7 | 31 | 56 | 6 |
| 26 | 7 | 31 | 56 | 6 |
| 27 | 8 | 32 | 54 | 6 |
| 28 | 8 | 33 | 53 | 6 |
| 29 | 9 | 33 | 52 | 6 |
| 30 | 9 | 34 | 52 | 5 |
Wind in September
Winds average 21 km/h in September, the calmest month.
Across September, daily wind ranges from about 21 km/h on the calmest days to 22 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 |
| Feels | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 22 | breezy |
| 2 | 21 | breezy |
| 3 | 21 | breezy |
| 4 | 21 | breezy |
| 5 | 21 | breezy |
| 6 | 21 | breezy |
| 7 | 21 | breezy |
| 8 | 21 | breezy |
| 9 | 21 | breezy |
| 10 | 21 | breezy |
| 11 | 21 | breezy |
| 12 | 21 | breezy |
| 13 | 21 | breezy |
| 14 | 21 | breezy |
| 15 | 21 | breezy |
| 16 | 21 | breezy |
| 17 | 21 | breezy |
| 18 | 21 | breezy |
| 19 | 21 | breezy |
| 20 | 21 | breezy |
| 21 | 21 | breezy |
| 22 | 21 | breezy |
| 23 | 21 | breezy |
| 24 | 21 | breezy |
| 25 | 21 | breezy |
| 26 | 21 | breezy |
| 27 | 21 | breezy |
| 28 | 21 | breezy |
| 29 | 21 | breezy |
| 30 | 21 | breezy |
Sunrise & sunset in September
Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 78 minutes over September. Sunrise moves from 6:11 AM to 6:38 AM, and sunset from 7:04 PM to 6:16 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.9 | 12.8 | 12.8 | 12.8 | 12.7 | 12.7 | 12.6 | 12.6 | 12.5 | 12.5 | 12.5 | 12.4 | 12.4 | 12.3 | 12.3 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.0 | 12.0 | 11.9 | 11.9 | 11.9 | 11.8 | 11.8 | 11.7 | 11.7 | 11.6 |
| Sunrise (AM) | 6:11 | 6:12 | 6:13 | 6:14 | 6:15 | 6:15 | 6:16 | 6:17 | 6:18 | 6:19 | 6:20 | 6:21 | 6:22 | 6:23 | 6:24 | 6:25 | 6:25 | 6:26 | 6:27 | 6:28 | 6:29 | 6:30 | 6:31 | 6:32 | 6:33 | 6:34 | 6:35 | 6:36 | 6:37 | 6:38 |
| Sunset (PM) | 7:04 | 7:02 | 7:01 | 6:59 | 6:58 | 6:56 | 6:54 | 6:53 | 6:51 | 6:49 | 6:48 | 6:46 | 6:44 | 6:43 | 6:41 | 6:39 | 6:38 | 6:36 | 6:34 | 6:33 | 6:31 | 6:29 | 6:28 | 6:26 | 6:25 | 6:23 | 6:21 | 6:20 | 6:18 | 6:16 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.9 | 6:11 | 7:04 |
| 2 | 12.8 | 6:12 | 7:02 |
| 3 | 12.8 | 6:13 | 7:01 |
| 4 | 12.8 | 6:14 | 6:59 |
| 5 | 12.7 | 6:15 | 6:58 |
| 6 | 12.7 | 6:15 | 6:56 |
| 7 | 12.6 | 6:16 | 6:54 |
| 8 | 12.6 | 6:17 | 6:53 |
| 9 | 12.5 | 6:18 | 6:51 |
| 10 | 12.5 | 6:19 | 6:49 |
| 11 | 12.5 | 6:20 | 6:48 |
| 12 | 12.4 | 6:21 | 6:46 |
| 13 | 12.4 | 6:22 | 6:44 |
| 14 | 12.3 | 6:23 | 6:43 |
| 15 | 12.3 | 6:24 | 6:41 |
| 16 | 12.2 | 6:25 | 6:39 |
| 17 | 12.2 | 6:25 | 6:38 |
| 18 | 12.2 | 6:26 | 6:36 |
| 19 | 12.1 | 6:27 | 6:34 |
| 20 | 12.1 | 6:28 | 6:33 |
| 21 | 12.0 | 6:29 | 6:31 |
| 22 | 12.0 | 6:30 | 6:29 |
| 23 | 11.9 | 6:31 | 6:28 |
| 24 | 11.9 | 6:32 | 6:26 |
| 25 | 11.9 | 6:33 | 6:25 |
| 26 | 11.8 | 6:34 | 6:23 |
| 27 | 11.8 | 6:35 | 6:21 |
| 28 | 11.7 | 6:36 | 6:20 |
| 29 | 11.7 | 6:37 | 6:18 |
| 30 | 11.6 | 6:38 | 6:16 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 5.27 kWh/m².
For context, solar energy here swings from a low near 2.01 kWh/m² to a high of 7.51 kWh/m² in July across the year — September's 5.27 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.1 | 6.0 | 6.0 | 5.9 | 5.9 | 5.8 | 5.8 | 5.7 | 5.6 | 5.6 | 5.5 | 5.5 | 5.4 | 5.3 | 5.3 | 5.2 | 5.2 | 5.1 | 5.1 | 5.0 | 5.0 | 4.9 | 4.8 | 4.8 | 4.8 | 4.7 | 4.7 | 4.6 | 4.5 | 4.5 |
| Level | Intense | Intense | 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 | 6.1 | Intense |
| 2 | 6.0 | Intense |
| 3 | 6.0 | Bright |
| 4 | 5.9 | Bright |
| 5 | 5.9 | Bright |
| 6 | 5.8 | Bright |
| 7 | 5.8 | Bright |
| 8 | 5.7 | Bright |
| 9 | 5.6 | Bright |
| 10 | 5.6 | Bright |
| 11 | 5.5 | Bright |
| 12 | 5.5 | Bright |
| 13 | 5.4 | Bright |
| 14 | 5.3 | Bright |
| 15 | 5.3 | Bright |
| 16 | 5.2 | Bright |
| 17 | 5.2 | Bright |
| 18 | 5.1 | Bright |
| 19 | 5.1 | Bright |
| 20 | 5.0 | Bright |
| 21 | 5.0 | Bright |
| 22 | 4.9 | Bright |
| 23 | 4.8 | Bright |
| 24 | 4.8 | Bright |
| 25 | 4.8 | Bright |
| 26 | 4.7 | Bright |
| 27 | 4.7 | Bright |
| 28 | 4.6 | Bright |
| 29 | 4.5 | Bright |
| 30 | 4.5 | Bright |
Hazard calendar for Cascais
None of Cascais's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Cascais's rainy season runs October–April, when most of the year's rain falls.
Is September a good time to visit Cascais?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is one of the better times to visit Cascais for general sightseeing.
What to pack for Cascais in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Cascais sees daytime highs around 19°C and nights near 18°C. Worth packing: sun protection and a windbreaker. About 4 days see rain.
Sea temperature near Cascais in September
The nearest coast averages about 19°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in September at about 19°C and coldest in February near 15°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 15 | 15 | 15 | 15 | 16 | 18 | 18 | 19 | 19 | 18 | 17 | 16 |
| Comfort | Cool | Bracing | Bracing | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 15 | Cool |
| Feb | 15 | Bracing |
| Mar | 15 | Bracing |
| Apr | 15 | Cool |
| May | 16 | Cool |
| Jun | 18 | Cool |
| Jul | 18 | Cool |
| Aug | 19 | Cool |
| Sep | 19 | Cool |
| Oct | 18 | Cool |
| Nov | 17 | Cool |
| Dec | 16 | Cool |
UV index in Cascais in September
Clear-sky midday UV in September 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 Cascais peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 6 | 8 | 7 | 9 | 9 | 9 | 6 | 5 | 3 | 2 |
| Level | Low | Moderate | High | Very high | Very high | Very high | Very high | Very high | High | High | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 6 | High |
| Apr | 8 | Very high |
| May | 7 | Very high |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 9 | Very high |
| Sep | 6 | High |
| Oct | 5 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Where is Cascais?
Cascais sits at 38.7°N, 9.4°W, 20 m above sea level, in Portugal. The nearest listed city is Monte Estoril, 2.0 km away.
Topography around Cascais
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Cascais.
Within 3 km, the terrain around Cascais has only modest variations in elevation — a maximum elevation change of 119 m around an average of 27 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 513 m; within 80 km, large variations in elevation — a maximum elevation change of 651 m.
The land around Cascais is covered by water (50%) and artificial surfaces (29%) within 3 km, water (63%) within 16 km, and water (50%) and grassland (23%) within 80 km.
Portugal travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / E / F
- 230 V · 50 Hz
- Prices
- ≈ 60% of US
- price level, 2025
- GDP per capita
- $32,082
- 2025
- Happiness
- 6.0 / 10
- World Happiness, 2025
- Safe drinking water
- 95%
- of population, 2024
- Homicide rate
- 0.7
- per 100k, 2022
- Road deaths
- 8.2
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very high
- EF EPI 612
- 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 Cascais (38.6968°, -9.4215°, elevation 20 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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).