San Diego/ Weather & Environment

Gloom to Glow: San Diego Forecast Points to a Warmer Weekend

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Published on September 21, 2026
Gloom to Glow: San Diego Forecast Points to a Warmer WeekendSource: Google Street View

San Diego is waking up under cloudy skies Monday, with temperatures around 70 degrees at San Diego International Airport and a mild afternoon ahead. The gray marine layer should thin by late morning, giving way to partly sunny skies and a high near 76 before clouds return tonight.

Clouds Fade, Then Return Overnight

The National Weather Service says coastal low clouds will cover much of the coast and nearby valleys into Tuesday morning. Monday afternoon will be mild, while clouds linger overnight.

Warmup Builds Through Saturday

Tuesday should be mostly sunny and reach 77 degrees. Wednesday climbs to 78, Thursday to 81, Friday to 75 and Saturday to 77.

A Sharper Turn From Sunday’s Forecast

That is a meaningful shift from Sunday’s Hoodline forecast, which called for a cooler start and possible patchy drizzle before the warmup. The updated outlook is cleaner and warmer for the second half of the week, especially Saturday.

Weekend Outlook

The weekend outlook includes possible tropical-system impacts. Coastal neighborhoods should stay milder than inland valleys and the lower deserts, where daytime temperatures will run considerably hotter.

No watches, warnings or advisories are listed for San Diego County in the current forecast. With clouds early, sun later and warmer afternoons ahead, Monday looks like a light-jacket morning that turns into a comfortable beach or patio day.