San Diego/ Weather & Environment

Inland San Diego Sizzles Under Heat Advisories While Coast Basks in Sunny 80s

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Published on August 22, 2026
Inland San Diego Sizzles Under Heat Advisories While Coast Basks in Sunny 80sSource: Rctckc, Public domain, via Wikimedia Commons

San Diego is starting today with partly cloudy skies and temperatures around 70 degrees, but the gray will give way to a mostly sunny afternoon near 84. The bigger heat concern is east of the coast, where inland valleys, mountains and deserts are facing a much hotter stretch.

Sunny Afternoon After A Cloudy Start

Patchy low clouds along the coast should thin by late morning, setting up a dry afternoon with west winds generally between 0 and 10 mph. Rain is essentially off the table, with only a 1% chance of precipitation in the city forecast.

Inland Areas Face The Bigger Heat Risk

The National Weather Service San Diego has a Heat Advisory in effect from 10 AM today through 8 PM next Monday for inland valleys and mountain areas, including parts of San Diego County. An Extreme Heat Warning remains in effect for the county deserts through next Friday, according to the National Weather Service.

Warm Pattern Holds Through Next Week

Tomorrow is expected to be slightly hotter, with a high near 86, followed by 85 next Monday and highs around 86 from next Tuesday through next Friday. Overnight lows will stay unusually warm, generally around 70 to 72 degrees, meaning homes and bodies may get less relief after sunset.

Plan Outdoor Time Around The Heat

Beach and coastal plans should be comfortable after the morning clouds clear, but anyone heading inland should schedule strenuous activities earlier, carry water and take regular breaks in the shade. San Diego libraries and recreation centers can serve as places to cool down during extreme heat; locations and operating details are listed on the city’s Places to Cool Down page.