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

October weather forecast and climate
Belvedere, CA

Ocean temperature

In October, the average ocean temperature in Belvedere, California, is 57°F (13.9°C).
Note: Swimming in 57°F (13.9°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.


The average length of the day in October is 11.2h.

What is the ocean temperature in October in Belvedere?

In Belvedere, California, in October, the average water temperature is 57°F (13.9°C). 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.

How many hours of daylight does Belvedere have in October?

In Belvedere, California, the average length of the day in October is 11.2h.
Average sea temperature in October - Belvedere, CA
  • Average sea temperature in October: 56.9°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 October - Belvedere, CA
  • Average daylight in October: 11.2h

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