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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Public Journal weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Cascais enjoys a mild Atlantic climate with warm summers and mild winters. The live forecast above shows today’s conditions for this coastal town west of Lisbon, where sea breezes keep temperatures comfortable year-round.
What is the weather like in Cascais this week?
The live forecast above gives the most accurate view for the next few days. Expect a mix of sun and cloud, with daytime highs typical for the season. The Atlantic influence means evenings can feel cooler, so a light jacket is useful even in summer. For a detailed hour-by-hour picture, check the cascais weather hourly data in the live panel.
What are the seasonal patterns for Cascais?
Summer (June–September) brings long, warm days with average highs around 26°C, tempered by the sea. Winter (November–February) is mild, with highs near 15°C and occasional rain – cascais weather november and cascais weather december both see about 10–12 wet days per month. Spring and autumn are pleasant shoulder seasons. For a broader view, cascais weather by month shows steady temperatures year-round.
When is the best time to visit Cascais?
Late spring (May–June) and early autumn (September–October) offer warm, settled weather with fewer crowds. Summer is ideal for beachgoers but can be busy. Winter is mild but rainier – check cascais weather 30 days before booking.
Does it rain a lot in Cascais in winter?
Rain is common from November to February, but it often comes in short showers rather than persistent downpours. For a 10-day or 14-day outlook, the live forecast above and cascais weather 14 days data give reliable guidance.
How accurate are long-range forecasts for Cascais?
Forecasts beyond 10 days are less reliable due to Atlantic weather patterns. For planning, use the live 10-day forecast and consider 21 day weather cascais portugal as a broad trend indicator only.
For more UK and Ireland weather, visit our UK weather hub or see the 10-day weather forecast for the UK.