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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the PressHive weather desk. Data from national met services via Open-Meteo.
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Cascais weather today is mild with patchy cloud, as shown in the live forecast above. The Atlantic coastal town west of Lisbon stays pleasant year-round, though sea breezes can strengthen in the afternoon.
What is the weather in Cascais like this week?
For the next few days, expect highs around 20-22°C with light winds. Night-time lows drop to 14-16°C. Those tracking the weather in cascais 10 days ahead can rely on the live forecast above, though Atlantic fronts may bring a brief shower midweek. The coast remains mostly dry, ideal for a stroll along the promenade or a trip to Boca do Inferno.
How does Cascais weather vary by month?
Summers are warm and dry, with July and August averaging 27°C. Winters are cool but rarely cold; cascais weather november and cascais weather december see daytime highs of 16-18°C and more rain. Spring and autumn offer the best balance of sunshine and mild temperatures. For a broader look at averages, check cascais weather by month data – the sunniest months are June through September. While cascais weather 30 days forecasts are less reliable, the 21 day weather cascais portugal outlook can give a general trend. Hourly conditions vary with the breeze – see cascais weather hourly updates on the live forecast panel.
What is the best time to visit Cascais?
Late spring (May/June) and early autumn (September/October) give warm, sunny days with fewer crowds. July and August are hottest but busier; winter is quieter but wetter, especially in November and December.
Does Cascais get windy?
Yes, strong Atlantic breezes are common, particularly in the afternoon. The wind can make sea temperatures feel cooler, so bring a light jacket even in summer. Surfing and sailing are popular because of the reliable winds.
Can I trust a 14-day forecast for Cascais?
Short-range forecasts up to 7 days are quite reliable. For cascais weather 14 days or longer, accuracy drops. Use the live forecast above for the next 10 days and check historical averages for monthly plans.
For UK comparisons, see our national weather hub or the 10 day weather forecast for the UK.