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

September weather forecast and climate
Isla Vista, CA

Ocean temperature

In September, the average ocean temperature in Isla Vista, California, is 61.3°F (16.3°C).
Note: Swimming in 61.3°F (16.3°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

The average length of the day in September in Isla Vista, California, is 12.4h.

How cold is the water in September in Isla Vista?

In Isla Vista, California, the average seawater temperature in September is 61.3°F (16.3°C). For swimming, a surface water temperature of 61.3°F (16.3°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

How many hours of daylight does Isla Vista have in September?

The average length of the day in September in Isla Vista, California, is 12.4h.
Average sea temperature in September - Isla Vista, CA
  • Average sea temperature in September: 61.3°F

The best month for swimming (with the highest average sea temperature) is August (62.2°F).
The coldest month (with the lowest average sea temperature) is April (55.7°F).

Average daylight in September - Isla Vista, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).