December weather forecast and climate
Sheerness, United Kingdom

Sea temperature

In December, the average sea temperature in Sheerness, United Kingdom, is 11.4°C (52.5°F).
Note: Swimming in 11.4°C (52.5°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.


The month with the shortest days in Sheerness is December, with an average of 7.9h of daylight.

What is the water temperature in December in Sheerness?

In Sheerness, United Kingdom, in December, the average water temperature is 11.4°C (52.5°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 month with the shortest days in Sheerness?

With an average of 7.9h of daylight, December has the shortest days of the year in Sheerness.

How many hours of daylight does Sheerness have in December?

In Sheerness, the average length of the day in December is 7.9h.
Average sea temperature in December - Sheerness, United Kingdom
  • Average sea temperature in December: 11.4°C

The best month for swimming (with the highest average sea temperature) is September (17.5°C).
The coldest month (with the lowest average sea temperature) is March (7.8°C).

Average daylight in December - Sheerness, United Kingdom
  • Average daylight in December: 7.9h

The month with the longest days is June (Average daylight: 16.5h).
The month with the shortest days is December (Average daylight: 7.9h).