Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Rianxo, Spain

Sea temperature

In December, the average sea temperature in Rianxo, Spain, is 14.8°C (58.6°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.


The month with the shortest days is December, with an average of 9.1h of daylight.

What is the water temperature in December in Rianxo?

In Rianxo, Spain, the average seawater temperature in December is 14.8°C (58.6°F). Swimming in 14.8°C (58.6°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 Rianxo?

With an average of 9.1h of daylight, December has the shortest days of the year in Rianxo.

How many hours of daylight does Rianxo have in December?

In December, the average length of the day in Rianxo is 9.1h.
Average sea temperature in December - Rianxo, Spain
  • Average sea temperature in December: 14.8°C

The best months for swimming (with the highest average sea temperature) are August and September (18.3°C).
The coldest month (with the lowest average sea temperature) is March (13.3°C).

Average daylight in December - Rianxo, Spain
  • Average daylight in December: 9.1h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).