Weather in May
May carries forward the positive weather trends observed in April in Alderney. The city becomes bathed in sunlight for no less than 15.4 hours a day on average, manifesting the fullness of spring and the looming arrival of summer. An equally remarkable uptick occurs in sea temperatures surging to a more tepid 11.8°C (53.2°F), enhancing the allure of outdoor sea activities. May emerges as a transformative period in Alderney's calendar year, bridging the mildness of spring to the imminent heat of summer.
Note: Unprotected swimming in 11.8°C (53.2°F) is dangerous due to potential cold shock. Especially when temperatures go below 10°C (50°F), leading to hyperventilation.
On the first day of the month, sunrise is at 05:44 and sunset at 20:27. On the last day of May, sunrise is at 05:06 and sunset at 21:07 BST.
Sea temperature
In Alderney, in May, the average water temperature is 11.8°C (53.2°F).Note: Unprotected swimming in 11.8°C (53.2°F) is dangerous due to potential cold shock. Especially when temperatures go below 10°C (50°F), leading to hyperventilation.
Daylight
The average length of the day in May is 15h and 24min.On the first day of the month, sunrise is at 05:44 and sunset at 20:27. On the last day of May, sunrise is at 05:06 and sunset at 21:07 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
What is the sea water temperature in May?
In Alderney, the average seawater temperature in May is 11.8°C (53.2°F). Swimming in 11.8°C (53.2°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.
How many hours of daylight does Alderney have in May?
In Alderney, the average day length in May is 15h and 24min.
When are sunrise and sunset in May?
In May, on the first day of the month, sunrise is at 05:44 and sunset at 20:27. On the last day of the month, sunrise is at 05:06 and sunset at 21:07 BST.
Average sea temperature in May
Alderney, Guernsey
- Average sea temperature in May: 11.8°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 May
Alderney, Guernsey
- Average daylight in May: 15h and 2min
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).
Alderney, Guernsey
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