San Diego, CA

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Last Map Update: Tue, Mar 17, 2026 at 1:54:15 am PDT

Watches, Warnings & Advisories

National Weather Service Los Angeles, CA

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National Weather Service NWS Flagstaff, AZ

Extreme Heat Warning

Heat Advisory

Beach Hazards Statement

Heat Advisory & Extreme Heat Warnings

Record Temperature Potential

High Temperatures for Thursday

Hottest Day of the Week, Highs on Friday

A Heat Advisory remains in effect for the coastal areas, inland valleys, and mountains until 8 PM Friday. An Extreme Heat Warning is in effect for the lower deserts from 10 AM Wednesday through 8 PM Saturday.

An early season heat wave has the potential to break monthly high temperature records, especially in the mountains and deserts.

As a very strong ridge builds in over the region by later this week, we will begin to see the possibility of breaking monthly records as highs soar more than 30 degrees above the seasonal average for some locations by Thursday! Daily max temperature records will likely be broken for many locations.

By Friday, as the ridge is at its strongest over the region, we will see the hottest temperatures of the week, with quite a few locations likely breaking monthly records within the lower deserts, mountains, and inland areas.