Weather in Cascais, Portugal in September

So you're interested in going to Cascais, Portugal in September

September is a hot and very dry time for sunbathing in Cascais. September is a good month for swimming in Cascais with warm sea temperatures. Consider visiting Cascais in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for September.

Temperature in Cascais in September

The average maximum temperature in Cascais in September is 26°. The average maximum temperature is 29° in the previous month and 24° in the next month.

The average temperature in Cascais in September is 22°. The average temperature ranges is 24° in the previous month and 20° in the next month.

The average minimum temperature in Cascais in September is 18°. The minimum temperature is 20° in the previous month and 16° in the next month.

Sunshine in Cascais in September

The average day light hours per day in Cascais in September are 12.4 and there are 8.6 hours of sunshine per day on average during September making it a sunny month with few clouds.

The ultraviolet index in Cascais in September is typically 7.4 during September. An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Cascais in September

The average sea water temperature in Cascais in September is 20.8° which is comfortable for swimming though some may prefer warmer water.

Rainfall in Cascais in September

The average total rainfall in Cascais in September is 0.3cm and on average there are 3.5 rainy days in September making it a very dry time to visit the beach.

Humidity in Cascais in September

The maximum dew point (an indicator of humidity) in Cascais in September is 19° which is somewhat uncomfortable for most people in cities but fine on a beach. The dew point is 19° in the previous month and 18° in the next month.

The average maximum relative humidity in Cascais in September is typically 89.1%. The maximum relative humidity is 84.3% in the previous month and 92% in the next month.

The average relative humidity in Cascais in September is typically 70.5%. The average relative humidity is 62.9% in the previous month and 75.1% in the next month.

Wind Speed in Cascais in September

The average maximum wind speed in Cascais in September is typically 24kmh. The average maximum wind speed is 25kmh in the previous month and 25kmh in the next month.

The average wind speed in Cascais in September is typically 12kmh. The average wind speed is 12kmh in the previous month and 12kmh in the next month.

The average wind direction in Cascais in September is from the West-Northwest.

Monthly Averages

Suggested Beaches in September

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