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

September weather forecast and climate
Bolinas, CA

Ocean temperature

With an average ocean temperature of 56.8°F (13.8°C), September is the month with the warmest seawater in Bolinas, California.
Note: Swimming in 56.8°F (13.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In Bolinas, the average length of the day in September is 12.4h.

What month is the ocean warmest in Bolinas?

The month with the warmest seawater in Bolinas, California, is September, with an average ocean temperature of 56.8°F (13.8°C).

How cold is the water in September in Bolinas?

In Bolinas, the average seawater temperature in September is 56.8°F (13.8°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.

What is the average length of the day in September in Bolinas?

In Bolinas, the average length of the day in September is 12.4h.
Average sea temperature in September - Bolinas, CA
  • Average sea temperature in September: 56.9°F

The best month for swimming (with the highest average sea temperature) is September (56.9°F).
The coldest month (with the lowest average sea temperature) is June (52.4°F).

Average daylight in September - Bolinas, CA
  • Average daylight in September: 12.4h

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