San Diego/ Weather & Environment

San Diego Forecast: Afternoon Showers, Late Wednesday Thunderstorm Chances

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Published on October 21, 2026
San Diego Forecast: Afternoon Showers, Late Wednesday Thunderstorm ChancesSource: Mds08011 / Wikimedia Commons

Low clouds are expected to redevelop overnight and extend into parts of the inland valleys by early Wednesday. Showers could reach coastal areas Wednesday afternoon, while the greatest thunderstorm chances are late Wednesday night into Thursday. The high will be near 76, with a 10% chance of rain during the day and southeast winds of 5 to 10 mph that could gust to 20 mph.

Coastal Showers Possible Wednesday Afternoon

According to the National Weather Service San Diego, showers could reach coastal areas Wednesday afternoon, while the greatest thunderstorm chances are late Wednesday night into Thursday. Coastal showers could make roads slick and visibility uneven, so drivers should use caution.

Wettest Stretch Comes Overnight

Wednesday night brings an 80% chance of showers and thunderstorms, mostly cloudy skies and a low around 64 degrees. Rainfall in San Diego County is expected to vary, with roughly 0.50 to 0.75 inch possible in the south and around 1 inch in the north through Thursday night.

Thursday Stays Cool Before The Weekend Rebound

Thursday will remain mostly cloudy with rain showers, a high near 70 and an 80% chance of precipitation. Rain may linger into Thursday night, but Friday turns mostly sunny near 70 before temperatures climb to about 75 Saturday, 80 Sunday, 81 Monday and 80 Tuesday.

The shift from last week’s heat and Santa Ana winds, previously covered by Hoodline, is now complete. No watches or warnings are listed for San Diego in the current forecast, but residents should still secure loose outdoor items, allow extra travel time and avoid driving through standing water.