Weather in August
August conveys the tail end of summer in Viana do Castelo, Portugal. With the highest low temperature of the year at 15.1°C (59.2°F), it enjoys a tiny marginally cooler climate compared to July. Owing to the generally pleasant weather, activities in Viana do Castelo rarely face any hindrance. As the temperature begins to dip towards the end of the month, conditions start to change hinting at the forthcoming autumn season in September.
Note: Most people find it challenging to enjoy swimming in water that is 17.9°C (64.2°F). As water temperature falls below 21°C (69.8°F), controlling breathing grows increasingly difficult.
On the first day of August in Viana do Castelo, sunrise is at 06:30 and sunset at 20:53. On the last day of the month, sunrise is at 07:00 and sunset at 20:10 WEST.
[Resources]Temperature
August brings the highest temperatures in Viana do Castelo, with an average high of 26.4°C (79.5°F) and an average low of 15.1°C (59.2°F).Sea temperature
In Viana do Castelo, the average seawater temperature in August is 17.9°C (64.2°F).Note: Most people find it challenging to enjoy swimming in water that is 17.9°C (64.2°F). As water temperature falls below 21°C (69.8°F), controlling breathing grows increasingly difficult.
Daylight
The average length of the day in August is 13h and 49min.On the first day of August in Viana do Castelo, sunrise is at 06:30 and sunset at 20:53. On the last day of the month, sunrise is at 07:00 and sunset at 20:10 WEST.
Frequently asked questions
What is the hottest time of year in Viana do Castelo?
Temperature readings in Viana do Castelo, Portugal, reach their annual highs in August, averaging 26.4°C (79.5°F) and a minimum average of 15.1°C (59.2°F).
What is the temperature in August in Viana do Castelo?
The high-temperature, in August, in Viana do Castelo, records 26.4°C (79.5°F), while the low-temperature is 15.1°C (59.2°F).
How cold is the water in August in Viana do Castelo?
In Viana do Castelo, the average seawater temperature in August is 17.9°C (64.2°F). For swimming, a surface water temperature of 17.9°C (64.2°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).
What is the average length of the day in August in Viana do Castelo?
In August, the average day length is 13h and 49min.
What time are sunrise and sunset in August in Viana do Castelo?
On the first day of August in Viana do Castelo, sunrise is at 06:30 and sunset at 20:53. On the last day of the month, sunrise is at 07:00 and sunset at 20:10 WEST.
Average temperature in August
Viana do Castelo, Portugal
- Average high temperature in August: 26.4°C
The warmest month (with the highest average high temperature) is August (26.4°C).
The month with the lowest average high temperature is January (14.6°C).
- Average low temperature in August: 15.1°C
The month with the highest average low temperature is July (15.3°C).
The coldest month (with the lowest average low temperature) is January (4.9°C).
Average sea temperature in August
Viana do Castelo, Portugal
- Average sea temperature in August: 17.9°C
The best month for swimming (with the highest average sea temperature) is September (18.3°C).
The coldest months (with the lowest average sea temperature) are February and March (13.8°C).
Average daylight in August
Viana do Castelo, Portugal
- Average daylight in August: 13h and 5min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
Viana do Castelo, Portugal
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