When to go · Cascais, Portugal
Best Time to Visit Cascais
Cascais has a mild year-round climate. The most comfortable months are August, July and May, based on five years of real temperature and rainfall records.
Go now
August, July, May
Comfortable and drier
Shoulder
June, September, October
Fewer crowds, a trade-off
Think twice
December, February
Hottest is August (23°C)
Cascais weather, month by month
| Month | High | Low | Rain | Feel |
|---|---|---|---|---|
| Jan | 15°C / 59°F | 10°C / 50°F | 50mm | cool, mostly dry |
| Feb | 16°C / 61°F | 11°C / 52°F | 75mm | cool, some rain |
| Mar | 17°C / 63°F | 12°C / 54°F | 55mm | mild, mostly dry |
| Apr | 18°C / 64°F | 13°C / 55°F | 58mm | mild, mostly dry |
| MayBEST | 20°C / 68°F | 15°C / 59°F | 26mm | mild, mostly dry |
| Jun | 21°C / 70°F | 17°C / 63°F | 29mm | mild, mostly dry |
| JulBEST | 23°C / 73°F | 17°C / 63°F | 3mm | warm, mostly dry |
| AugBEST | 23°C / 73°F | 18°C / 64°F | 2mm | warm, mostly dry |
| Sep | 22°C / 72°F | 18°C / 64°F | 59mm | mild, mostly dry |
| Oct | 22°C / 72°F | 17°C / 63°F | 92mm | mild, some rain |
| Nov | 18°C / 64°F | 13°C / 55°F | 64mm | mild, some rain |
| Dec | 16°C / 61°F | 12°C / 54°F | 145mm | cool, wet |
Averages from Open-Meteo ERA5 climate reanalysis, 2019 to 2023. Highs and lows are daily averages for each month; rain is the monthly total. Tap a month for a detailed guide.
Want the timing decided for you? A Local Friend in Cascais plans around the seasons for you.