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

September weather forecast and climate
Moss Beach, CA

Ocean temperature

With an average ocean temperature of 56.8°F (13.8°C), September is the month with the warmest seawater in Moss Beach, 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 Moss Beach, the average length of the day in September is 12.4h.

When is the ocean warmest in Moss Beach?

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

What is the water temperature in September in Moss Beach?

In September, the average ocean temperature in Moss Beach, California, 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.

How many hours of daylight does Moss Beach have in September?

In Moss Beach, the average length of the day in September is 12.4h.
Average sea temperature in September - Moss Beach, 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 - Moss Beach, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.6h).