{"id":596,"date":"2026-06-10T22:03:01","date_gmt":"2026-06-10T22:03:01","guid":{"rendered":"https:\/\/sanfranciscomovingguide.com\/?p=596"},"modified":"2026-06-10T22:03:01","modified_gmt":"2026-06-10T22:03:01","slug":"heat-advisory-issued-as-bay-area-sees-major-temperature-increase","status":"publish","type":"post","link":"https:\/\/sanfranciscomovingguide.com\/?p=596","title":{"rendered":"Heat advisory issued as Bay Area sees major temperature increase"},"content":{"rendered":"
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A building ridge of high pressure in the Pacific Ocean is sending temperatures soaring in the Bay Area starting Wednesday, with even hotter weather expected Thursday.<\/p>

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Lamont Bain, a meteorologist with the National Weather Service, explained the \u201cculprit\u201d for the rapidly rising temperatures is \u201coffshore flow,\u201d where the wind blows from inland out to the ocean, bringing hot weather to normally cooler coastal regions.<\/p><\/div>

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\u201cWhen we see these offshore flow patterns, that really allows us to bake, because we don\u2019t get the influence of the marine layer,\u201d he told\u00a0SFGATE.<\/p><\/div>

On Wednesday, temperatures in much of the Bay Area will be 5 to 15 degrees above average, while Thursday temperatures are more likely to run closer to 20 degrees above normal,\u00a0Bain explained. The North Bay, where red flag warnings have been issued, could see temperatures 25 degrees above normal.<\/p><\/div>

The National Weather Service\u00a0issued a heat advisory starting noon on Thursday for parts of the Bay Area. The advisory comes as temperatures are expected to reach 103 for the interior valleys, especially at high elevations. Even coastal areas could see temperatures reach between 80 and 96 degrees.<\/p><\/div>

Temperatures inland in the East Bay are already climbing, with Concord expected to reach 96 on Wednesday and 104 on Thursday. San Jose is expected to near 90 on Wednesday and about 95 on Thursday. And while cooler, downtown San Francisco is expected to see a major temperature shift, rising to 77 degrees on Wednesday and 84 on Thursday.<\/p><\/div>

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Bain said the hot, windy weather will also dry out fuels in the hills, increasing the risk of wildfires. \u201cEven just a couple of days of sunshine will dry those grasses out,\u201d he said.<\/p><\/div>

The weather service\u00a0issued a red flag warning for parts of the North Bay interior mountains and the East Bay Hills starting Wednesday evening at 11 p.m. and lasting until 9 a.m. Thursday. The warning is in response to a forecast of low humidity and high winds of 10 to 20 mph, with gusts expected to top out at 45 mph or up to 60 mph on the ridgetops.\u00a0<\/p>

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It\u2019s the first red flag warning of the year for the Bay Area and comes as Cal Fire is still working to contain a fire in nearby Yolo County.<\/p><\/div>

\u201cThe combination of the\u00a0hot, dry, and windy conditions will result in critical fire weather\u00a0conditions where any fires that start could take hold and spread\u00a0rapidly,\u201d the weather service forecast discussion read.\u00a0<\/p><\/div>

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