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

December weather forecast and climate
Ardglass, United Kingdom

Sea temperature

In December, the average sea temperature in Ardglass, United Kingdom, is 10.9°C (51.6°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.


With an average of 7.4h of daylight, December has the shortest days of the year in Ardglass.

What is the sea water temperature in December in Ardglass?

In Ardglass, United Kingdom, the average seawater temperature in December is 10.9°C (51.6°F). Swimming in 10.9°C (51.6°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Ardglass?

The month with the shortest days in Ardglass is December, with an average of 7.4h of daylight.

How many hours of daylight does Ardglass have in December?

The average length of the day in December is 7.4h.
Average sea temperature in December - Ardglass, United Kingdom
  • Average sea temperature in December: 10.9°C

The best month for swimming (with the highest average sea temperature) is August (14.8°C).
The coldest month (with the lowest average sea temperature) is March (8.2°C).

Average daylight in December - Ardglass, United Kingdom
  • Average daylight in December: 7.4h

The month with the longest days is June (Average daylight: 17.1h).
The month with shortest days is December (Average daylight: 7.4h).