San Diego's Weather Forecast for Sept. 15, 2021: Cool, Dry, and Breezy

Posted at 4:56 AM, Sep 15, 2021
and last updated 2021-09-16 01:48:47-04

Despite the cool down, we are gearing up for elevated fire danger into next week.

The latest ridge of high pressure continues to break down, allowing the marine layer to strengthen and for onshore winds to pick up speed. We can expect gusty westerly winds each afternoon and evening over the mountains and deserts ranging from 20 to 35mph.

As temperatures continue to drop, the air will become drier leading to relative humidity levels in the teens over the mountains and single digits in the deserts. The combination of dry air, and gusty winds will mean elevated fire danger. The fire concern is expected to continue through the weekend, before we could possibly shift into Santa Ana conditions early next week.

Elevated surf will be ending tonight with a Beach Hazard Statement in effect until 9pm.

The marine layer will spread farther inland each morning this week, before clearing out to sunny skies. Patchy fog will be possible during the morning commute.

Fall is right around the corner with the Autumnal Equinox happening at 12:21pm on September 22nd.

Thursday's Highs:
Coast: 70-76°
Inland: 78-87°
Mountains: 78-92°
Deserts: 105-110°

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