Cascais (Lisbon Coast) Sea Water Temperature
Charming royal seaside town on the Portuguese Riviera just 30 minutes from Lisbon. Today's reading, 7-day forecast, and monthly averages below.
Cascais (Lisbon Coast) water temperature
Pleasant and revitalizing. Great for most beachgoers and active recreational swimming.
7-Day Water Temperature Forecast
Cascais (Lisbon Coast) Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in Cascais (Lisbon Coast) occurs inJul, Aug, Sep — peaking at20.7°C (69.3°F) in August.
Year-Round Water Temperature Curve (°C / °F)
Hover a bar for detailsFull 12-month data table — min / avg / max & swimming comfort
| Month | Min Water Temp | Average Water Temp | Max Water Temp | Swimming Comfort |
|---|---|---|---|---|
| January | 13.9°C | 14.8°C | 15.7°C | Very Cold (< 16°C) |
| February | 13.5°C | 14.3°C | 15.2°C | Very Cold (< 16°C) |
| March | 13.8°C | 14.7°C | 15.7°C | Very Cold (< 16°C) |
| April | 14.6°C | 15.6°C | 16.8°C | Very Cold (< 16°C) |
| May | 15.8°C | 17°C | 18.3°C | Cool / Refreshing (16°C – 20°C) |
| June | 17.4°C | 18.7°C | 20.1°C | Cool / Refreshing (16°C – 20°C) |
| July | 18.8°C | 20.1°C | 21.5°C | Comfortable (20°C – 24°C) |
| August | 19.4°C | 20.7°C | 22.1°C | Comfortable (20°C – 24°C) |
| SeptemberCurrent | 19.1°C | 20.3°C | 21.6°C | Comfortable (20°C – 24°C) |
| October | 17.9°C | 19°C | 20.2°C | Cool / Refreshing (16°C – 20°C) |
| November | 16.1°C | 17.1°C | 18.2°C | Cool / Refreshing (16°C – 20°C) |
| December | 14.6°C | 15.5°C | 16.5°C | Very Cold (< 16°C) |
Swimming FAQs for Cascais (Lisbon Coast)
Is the sea warm enough to swim in Cascais (Lisbon Coast) today?
Typical sea surface temperature in Cascais (Lisbon Coast) this time of year is 20.3°C (68.5°F) — classified as Comfortable (20°C – 24°C). Pleasant and revitalizing. Great for most beachgoers and active recreational swimming. Live readings load automatically.
What are the warmest months for swimming in Cascais (Lisbon Coast)?
The highest water temperatures in Cascais (Lisbon Coast) typically occur duringJul, Aug, Sep, when monthly averages reach peak seasonal levels.
What is the typical water temperature in Cascais (Lisbon Coast) in September?
Historically in September, water temperatures in Cascais (Lisbon Coast) average around20.3°C (68.5°F), fluctuating between a recorded minimum of 19.1°C and a maximum of 21.6°C.