Cascais weather by month & the best time to visit
🇵🇹 Portugal · seaside town · Mediterranean climate
The best time to visit Cascais is July — its sunniest month (Sunshine Score 96/100), with August and June close behind. Cascais averages about 2,985 hours of sunshine a year. Daytime highs around 22°C / 72°F and roughly 3 mm of rain in July.
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- Sun hours / year
- 2,985
- Sunniest month
- July
- Peak score
- 96/100
- Rain / year
- 541 mm
- Midday UV at peak
- 9 (very high)
- Sea at warmest
- 19°C / 66°F
- Population
- 36k
- Elevation
- 93 m
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When is the best time to visit Cascais?
For sunshine, the best time to visit Cascais is July, then August and June. The dullest month is January (42/100, 65 mm of rain). The full month-by-month picture is in the table below.
How sunny is Cascais?
Cascais gets a lot of sun: around 2,985 hours a year. 54 Sunshine Score points separate July (96) from January (42), so the month you pick matters. It ranks #4 of 19 destinations in Portugal for annual sunshine, above the national median of 2,683 hours. Rain has a clear season: the wettest stretch, around November, carries about 43% of the annual 541 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 42 | 14° / 57°F | 11° / 52°F | 65 mm | 2 | 15° / 59°F |
| February | 44 | 14° / 57°F | 10° / 50°F | 51 mm | 3 | 16° / 61°F |
| March | 50 | 15° / 59°F | 11° / 52°F | 60 mm | 5 | 15° / 59°F |
| April | 65 | 17° / 63°F | 13° / 55°F | 54 mm | 6 | 16° / 61°F |
| May | 83 | 19° / 66°F | 14° / 57°F | 31 mm | 8 | 16° / 61°F |
| June | 95 | 21° / 70°F | 16° / 61°F | 11 mm | 8 | 18° / 64°F |
| July | 96 | 22° / 72°F | 17° / 63°F | 3 mm | 9 | 19° / 66°F |
| August | 96 | 23° / 73°F | 18° / 64°F | 6 mm | 8 | 18° / 64°F |
| September | 92 | 22° / 72°F | 17° / 63°F | 25 mm | 6 | 16° / 61°F |
| October | 82 | 20° / 68°F | 16° / 61°F | 79 mm | 4 | 18° / 64°F |
| November | 60 | 17° / 63°F | 13° / 55°F | 92 mm | 2 | 18° / 64°F |
| December | 50 | 15° / 59°F | 11° / 52°F | 64 mm | 2 | 17° / 63°F |
Sea temperature in Cascais by month
The sea off Cascais is warmest in July at around 19°C / 66°F, and coolest in January at 15°C / 59°F. It never reaches comfortable swimming temperatures (21°C+). Month-by-month sea-surface temperatures are in the Sea column of the table above.
See Cascais on the interactive sunshine globe →
Nearby places for sunshine
- Lisbon Portugal · 20 km · best in Jul · 2,985 h sun/yr
- Faro Portugal · 226 km · best in Jul · 3,157 h sun/yr
- Porto Portugal · 286 km · best in Jul · 2,694 h sun/yr
- Seville Spain · 336 km · best in May · 3,167 h sun/yr
- Jerez de la Frontera Spain · 364 km · best in Jun · 3,263 h sun/yr
- Vigo Spain · 395 km · best in Jul · 2,384 h sun/yr
Nearest destinations
- Portimão Portugal · 188 km · 3,196 h sun/yr · best in Jul
- Badajoz Spain · 220 km · 3,143 h sun/yr · best in Jun
- Viseu Portugal · 255 km · 2,860 h sun/yr · best in Jul
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