California, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Belvedere, CA

Ocean temperature

In January, the average ocean temperature in Belvedere, California, is 53.2°F (11.8°C).
Note: At temperatures below 50°F (10°C), 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 55.4°F (13°C) is not comfortable.


In January, the average length of the day in Belvedere is 9.9h.

How cold is the water in January in Belvedere?

In Belvedere, California, the average seawater temperature in January is 53.2°F (11.8°C). Swimming in 53.2°F (11.8°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

How many hours of daylight does Belvedere have in January?

In Belvedere, the average length of the day in January is 9.9h.
Average sea temperature in January - Belvedere, CA
  • Average sea temperature in January: 53.2°F

The best month for swimming (with the highest average sea temperature) is September (57.3°F).
Coldest months (with the lowest average sea temperature) are April and June (53°F).

Average daylight in January - Belvedere, CA
  • Average daylight in January: 9.9h

The month with the longest days is June (Average daylight: 14.8h).
The month with shortest days is December (Average daylight: 9.6h).