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

March weather forecast and climate
Alderney, Guernsey

Sea temperature

With an average sea temperature of 9.3°C (48.7°F), Marzo is the month with the coldest seawater in Alderney, Guernsey.
Note: 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.

Daylight

In Alderney, the average length of the day in Marzo is 11.9h.

When is the sea coldest in Alderney?

With an average sea temperature of 9.3°C (48.7°F), Marzo is the month with the coldest seawater in Alderney, Guernsey.

How cold is the water in Marzo in Alderney?

In Marzo, the average sea temperature is 9.3°C (48.7°F). Swimming in 9.3°C (48.7°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

How many hours of daylight does Alderney have in Marzo?

The average length of the day in Marzo in Alderney is 11.9h.
Average sea temperature in March - Alderney, Guernsey
  • Average sea temperature in March: 9.3°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 March - Alderney, Guernsey
  • Average daylight in March: 11.9h

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