Town in Lisbon, Portugal
Cascais weather by month and the best time to visit
When to go to Cascais
May–June and Sep–Oct are warm and calmer. Jul–Aug is crowded with day-trippers; winter is mild but rainy and quiet.
Cascais weather by month
Average daily high, rainfall and conditions.
- Jan15°65 mm
- Feb15°51 mm
- Mar16°60 mm
- Apr17°54 mm
- May19°31 mm
- Jun21°11 mm
- Jul22°3 mm
- Aug23°6 mm
- Sep22°25 mm
- Oct21°79 mm
- Nov17°92 mm
- Dec15°64 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 15°C58°F | 11°C52°F | 65 mm | 81% | Cool |
| February | 15°C59°F | 11°C51°F | 51 mm | 80% | Cool |
| March | 16°C61°F | 12°C53°F | 60 mm | 80% | Cool |
| April | 17°C63°F | 13°C55°F | 54 mm | 80% | Cool |
| May | 19°C66°F | 15°C58°F | 31 mm | 79% | Pleasant |
| June | 21°C70°F | 17°C62°F | 11 mm | 80% | Pleasant |
| July | 22°C72°F | 18°C64°F | 3 mm | 81% | Pleasant |
| August | 23°C73°F | 18°C64°F | 6 mm | 81% | Pleasant |
| September | 22°C72°F | 18°C64°F | 25 mm | 81% | Pleasant |
| October | 21°C69°F | 17°C62°F | 79 mm | 81% | Pleasant |
| November | 17°C63°F | 14°C57°F | 92 mm | 80% | Cool |
| December | 15°C60°F | 12°C53°F | 64 mm | 82% | Cool |
Best months across Portugal
| Place | Best months | Warmest month |
|---|---|---|
| Lisbon | Apr–Jun, Sep–Oct | Aug (23°C) |
| Porto | May–Jun, Sep–Oct | Aug (24°C) |
| Algarve | May–Jun, Sep–Oct | Jul (28°C) |
| Madeira | May–Jul, Sep–Oct | Aug (23°C) |
| Sintra | Apr–Jun, Sep–Oct | Aug (24°C) |
| Lagos | May–Jun, Sep–Oct | Aug (24°C) |
| Albufeira | May–Jun, Sep–Oct | Jul (28°C) |
| Cascais | May–Jul, Sep–Oct | Aug (23°C) |
| Azores | Jun–Sep | Aug (24°C) |
| Faro | Apr–Jun, Sep–Oct | Jul (28°C) |
| Ericeira | May–Jun, Sep–Oct | Aug (24°C) |
| Coimbra | Apr–Jun, Sep–Oct | Aug (34°C) |
| Douro Valley | Apr–May, Sep–Oct | Aug (34°C) |
| Évora | Mar–May, Oct–Nov | Aug (34°C) |
| Braga | May–Jun, Sep–Oct | Aug (31°C) |
| Aveiro | May–Jul, Sep–Oct | Aug (26°C) |
| Nazaré | May–Jun, Sep–Oct | Aug (22°C) |
| Silver Coast | May–Jun, Sep–Oct | Aug (22°C) |
| Tavira | May–Jun, Sep–Oct | Aug (28°C) |
Quick answers
What is the best month to visit Cascais?
May–Jul, Sep–Oct. May–June and Sep–Oct are warm and calmer. Jul–Aug is crowded with day-trippers; winter is mild but rainy and quiet.
When is the rainy season in Cascais?
Rain peaks in November with about 92 mm. No month averages 150 mm or more.
What is the hottest month in Cascais?
August, with average highs of 23°C (73°F).
How cold does Cascais get?
The coolest nights are in February, averaging 11°C (51°F).
More about Cascais
Going to Cascais solo?
SoloSquare is where travelers, nomads and locals in Cascais meet up for small plans: coffee, dinners, walks and day trips. Join one, or start your own in a minute.
Sources
- NASA POWER climatology (2001–2020)
- CP Comboios de Portugal
- Câmara Municipal de Cascais
- Visit Cascais
- Lisbon Airport (ANA)
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.