Alderney
Guernsey
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Alderney, Guernsey

Sea temperature

In Alderney, Guernsey, in Mayo, the average water temperature is 11.8°C (53.2°F).
Note: 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.

Daylight

The average length of the day in Mayo in Alderney is 15.4h.

What is the sea water temperature in Mayo in Alderney?

In Mayo, the average sea temperature in Alderney is 11.8°C (53.2°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

What is the average length of the day in Mayo in Alderney?

In Mayo, the average length of the day in Alderney, Guernsey, is 15.4h.
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: 15.4h

The month with the longest days is June (Average daylight: 16.2h).
The month with shortest days is December (Average daylight: 8.2h).