August weather forecastAlderney, Guernsey
August
Weather in August
August in Alderney perseveres with the trend of comfortable summer weather. There are still long stretch of hours under the sun, claiming a substantial 14.4 daylight hours on average. Sea conditions remain inviting, with temperatures hovering around 17.2°C (63°F). August stands out as a slightly milder alternative to July, allowing for enjoyable summer outdoor activities without the intensity of peak summer heat.Sea temperature
In Alderney, the average seawater temperature in August is 17.2°C (63°F).Note: For most people, a water temperature of 17.2°C (63°F) is not conducive to enjoyable swimming. Breathing control becomes harder as the water temperature dips below 21°C (69.8°F).
Daylight
In Alderney, the average length of the day in August is 14h and 23min.On the first day of the month, sunrise is at 05:40 and sunset at 20:50. On the last day of August, sunrise is at 06:23 and sunset at 19:54 BST.
Updated: Jun 5, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In August, the average sea temperature is 17.2°C (63°F). Swimming in 17.2°C (63°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).
The average day length in August is 14h and 23min.
In August, on the first day of the month, sunrise is at 05:40 and sunset at 20:50. On the last day of the month, sunrise is at 06:23 and sunset at 19:54 BST.
Average sea temperature in August
Alderney, Guernsey
- Average sea temperature in August: 17.2°C
The best month for swimming (with the highest average sea temperature) is September (17.4°C).
The coldest month (with the lowest average sea temperature) is March (9.3°C).
Average daylight in August
Alderney, Guernsey
- Average daylight in August: 14h and 24min
The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 12min).





