Cascais (Portugal) is a place with a hot climate. Temperatures during the day are in the range from 14.9 °C (58.8 °F) in January to 23.5 °C (74.3 °F) in August. The driest month is July with just 1 days of rain, on the contrary, the month when it rains the most is November with 11 days of rain. Sea temperatures are in the following range: 14.6 °C (58.4 °F) in February to 18.8 °C (65.9 °F) in August. Temperatures during the night go from 8.8 °C (47.8 °F) in January to 15.6 °C (60.1 °F) in August.

January weather

The day temperature is on its minimum, with its value being 14.9 °C (58.8 °F) in Cascais, while the sea temperature descents similarly to the previous month, with its value being 15.1 °C (59.2 °F). The beginning of the descent of the number of rainy days could be noticed, with its value being 10 days, and the rainfall amount descent's start could be observed as well in this month. The night temperature is on its minimum, the value of this measure is 8.8 °C (47.8 °F). The humidity is on its maximum, its value is 81 %.

February weather

The beginning of the rise of the day temperature could be noticed, the value of this measure is 15.8 °C (60.4 °F) in Cascais, while the minimum of the sea temperature can be noticed in February. The beginning of the rise of the night temperature could be noticed in February. The rainfall amount descents similarly to the previous month. The beginning of the rise of the number of sun hours (without clouds) could be noticed in this month.

March weather

The day temperature rises similarly to the previous month, with its value being 17.8 °C (64.0 °F) in Cascais, and the rise of the night temperature can be observed as well, with its value being 10.8 °C (51.4 °F). The number of rainy days starts to descent, its value is 7 days, while the rainfall amount continues to descent, with its value of 49 mm (1.91 in). The rise of the number of sun hours (without clouds) can be observed, with its value being 7 hours.

April weather

The rise of the day temperature can be observed, with its value of 18.4 °C (65.1 °F) in Cascais, and the night temperature continues to rise too, with its value of 11.4 °C (52.5 °F). The beginning of the rise of the number of rainy days could be noticed, with its value of 9 days, and the rainfall amount starts to rise too, its value is 58 mm (2.29 in). The rise of the number of sun hours (without clouds) can be observed, the value of this measure is 8 hours.

May weather

The beginning of the rise of the sea temperature could be noticed, with its value being 16.2 °C (61.1 °F) in Cascais, while the day temperature rises similarly to the previous month, with its value being 20.0 °C (68.0 °F). The beginning of the descent of the number of rainy days could be noticed, with its value being 6 days, and the rainfall amount starts to descent too, with its value of 44 mm (1.73 in). The night temperature rises similarly to the previous month, with its value of 12.9 °C (55.2 °F). The rise of the number of sun hours (without clouds) can be observed, its value is 9 hours.

June weather

The sea temperature continues to rise in Cascais, and the day temperature continues to rise too, with its value of 22.6 °C (72.7 °F). The rainfall amount descents similarly to the previous month, with its value of 15 mm (0.58 in), and the number of rainy days continues to descent as well, with its value being 3 days. The rise of the number of sun hours (without clouds) can be observed. The night temperature rises similarly to the previous month, its value is 15.0 °C (59.0 °F).

July weather

The tourist season slowly starts in Cascais. The sea temperature continues to rise, with its value of 18.4 °C (65.1 °F), and the rise of the day temperature can be observed as well, its value is 23.2 °C (73.8 °F). The number of rainy days reaches its minimum, its value is 1 days, and the minimum of the rainfall amount can be noticed as well, with its value of 5 mm (0.18 in). The number of sun hours (without clouds) is on its maximum in this month.

August weather

The day temperature reaches its maximum, with its value being 23.5 °C (74.3 °F) in Cascais, and the maximum of the sea temperature can be noticed too, with its value of 18.8 °C (65.9 °F). There is pending tourist season, and the dry season is close to its peak as well this month. The maximum of the night temperature is observable, with its value being 15.6 °C (60.1 °F). The minimum of the humidity can be noticed, with its value of 64 %.

September weather

There is pending tourist season in Cascais, and the dry season continues as well. The beginning of the descent of the day temperature could be noticed in September. The rainfall amount starts to rise, and the number of rainy days rise's start could be observed too, the value of this measure is 4 days. The beginning of the descent of the number of sun hours (without clouds) could be noticed, with its value being 8 hours.

October weather

The day temperature continues to descent, its value is 21.2 °C (70.2 °F) in Cascais, while the beginning of the descent of the sea temperature could be noticed, with its value of 18.1 °C (64.6 °F). The number of rainy days rises similarly to the previous month, with its value being 9 days, and the rainfall amount rises similarly to the previous month as well, with its value of 87 mm (3.41 in). The night temperature starts to descent, with its value of 14.7 °C (58.5 °F). The number of sun hours (without clouds) descents similarly to the previous month.

November weather

The descent of the day temperature can be observed, with its value being 17.7 °C (63.9 °F) in Cascais, and the sea temperature descents similarly to the previous month as well, the value of this measure is 17.1 °C (62.8 °F). The maximum of the number of rainy days can be noticed, the value of this measure is 11 days, and the maximum of the rainfall amount is observable too, the value of this measure is 109 mm (4.30 in). The descent of the number of sun hours (without clouds) can be observed, with its value being 5 hours. The descent of the night temperature can be observed, with its value of 12.0 °C (53.6 °F).

December weather

The descent of the day temperature can be observed, its value is 15.3 °C (59.5 °F) in Cascais, and the sea temperature descents similarly to the previous month too, with its value being 15.9 °C (60.7 °F). The night temperature continues to descent, its value is 10.1 °C (50.2 °F). The number of sun hours (without clouds) reaches its minimum, with its value being 5 hours. The day length reaches its minimum, its value is 9 hours.

FAQs

How many sunny hours can I expect in Cascais in March?

In March in Cascais, you can expect around 7 hours of sunshine.

What is the air temperature in Cascais in April at night?

The average night temperature in Cascais in April is 11.4 °C (52.5 °F). Nights can be cooler, morning running can be refreshing but choose appropriate clothing, evening outdoor sitting can be pleasant but you can also be cold.

Are there good conditions to visit in May in Cascais?

Cascais can be visited in May - the weather will be moderate. The temperature of 12.9 °C (55.2 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.

What is the average number of rainy days in Cascais in June?

In Cascais in June, we can expect 3 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 0.6 days of the week, or in general - 9 % days.

What is the temperature in Cascais during the day in July?

The average daily temperature in July in Cascais is 23.2 °C (73.8 °F). A comfortable temperature for most people, where it is neither too cold nor too hot, and a large number of activities can be carried out comfortably, including sunbathing by the water. Lighter clothing will be suitable - shorts, skirts, t-shirts, jackets; a light sweater and long trousers may also be useful.

What is the sea temperature in August in Cascais?

In August in Cascais expect the sea to be warm at 18.8 °C (65.9 °F). At this sea temperature, swimming probably won't be the best experience. You probably won't like to stay in water for a long time. On the other hand, there are a minority of people who seek these conditions.

Is September part of the wet season in Cascais?

No, there is no wet season in September in Cascais - you can expect 4 days of rain during the month.

Is there a dry season in Cascais in October?

No, October is not a dry month in Cascais, expect rain approximately 9 days in a month.