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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Regional Report weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Cascais has a mild Mediterranean climate with warm, dry summers and mild, damp winters. The live forecast above shows today’s conditions, while seasonal averages help plan trips for sun, sightseeing or coastal walks.
How does Cascais weather change through the year?
Winters are mild and often wetter, while summers are long, sunny and pleasantly warm, moderated by the Atlantic breeze.
- Summer (June–September): average highs 26–28°C, sea temperatures peak near 22°C, very little rainfall
- Autumn (October–November): temperatures drop to 18–22°C, rain increases, especially in November
- Winter (December–February): highs around 15–17°C, mild nights near 8–10°C, most rain falls now
- Spring (March–May): warming up, 18–23°C by May, sunny days with occasional showers
What are the best months for a Cascais visit?
For hottest beach weather, plan between June and September; for fewer crowds and still comfortable conditions, May or October work well.
- May and October: pleasant 20–24°C, fewer tourists, good for exploring and hiking
- November and December: cooler but still mild for city breaks; cascais weather november averages 16–18°C and cascais weather december around 14–16°C
- For long-range planning, check cascais weather 30 days or cascais weather 14 days above for trends, though accuracy drops beyond 7 days
- Hourly updates: the cascais weather hourly section in the live forecast above gives precise timing for outdoor plans
What is the weather like in Cascais during November?
November brings cooler temperatures averaging 16–18°C, with increased rainfall and shorter days. It remains mild enough for sightseeing, but expect some wet days and pack a light jacket.
Does Cascais have a rainy season?
Yes, from November to February, with December and January being wettest. Rain often comes in short but heavy bursts, and sunny spells return quickly. For detailed planning, see cascais weather by month data.
How accurate are extended forecasts for Cascais?
Extended outlooks like 21 day weather cascais portugal give general trends but become less reliable beyond 7–10 days. Always check the live forecast above for the latest update and use weather in cascais 10 days for a practical horizon.
Sources
For UK comparisons, see our 10 Day Weather Forecast UK or check Birmingham Weather. For other destinations, explore our UK weather hub.