Ballycastle
United Kingdom
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Ballycastle, United Kingdom

Sea temperature

In December, the average sea temperature in Ballycastle, United Kingdom, is 10.5°C (50.9°F).
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

December has the shortest days of the year in Ballycastle, with an average of 7.2h of daylight.

What is the sea water temperature in December in Ballycastle?

In Ballycastle, United Kingdom, the average seawater temperature in December is 10.5°C (50.9°F). Swimming in 10.5°C (50.9°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.

What is the month with the shortest days in Ballycastle?

With an average of 7.2h of daylight, December has the shortest days of the year.

What is the average length of the day in December in Ballycastle?

In Ballycastle, the average length of the day in December is 7.2h.
Average sea temperature in December - Ballycastle, United Kingdom
  • Average sea temperature in December: 10.5°C

The best month for swimming (with the highest average sea temperature) is August (14.2°C).
Coldest months (with the lowest average sea temperature) are February and March (8.3°C).

Average daylight in December - Ballycastle, United Kingdom
  • Average daylight in December: 7.2h

The month with the longest days is June (Average daylight: 17.3h).
The month with shortest days is December (Average daylight: 7.2h).