Bay Area/ San Francisco

Bay Area Braces for Sweltering Weekend as Temperatures Soar, NWS San Francisco Issues Heat Advisory

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Published on August 06, 2025
Bay Area Braces for Sweltering Weekend as Temperatures Soar, NWS San Francisco Issues Heat AdvisorySource: Raydann, CC BY-SA 4.0, via Wikimedia Commons

The National Weather Service San Francisco reports a warming trend through the upcoming weekend, with temperatures climbing into the mid to upper 90s across interior portions of the Bay Area, raising concerns for people sensitive to heat, particularly those without effective cooling and adequate hydration. With many regions potentially seeing high temperatures above 90 degrees, pockets of moderate HeatRisk are forecasted, primarily affecting the interior North Bay, East Bay Hills, and Santa Clara Valley, including San Jose, according to the National Weather Service.

In a detailed forecast discussion shared by the same source, conditions for the interior East and South Bays are also expected to suffer from this exacerbated warmth Friday through Sunday, with interior pockets possibly reaching up to 101 degrees, the moderation of which will be forcibly challenged by daily afternoon breezes intensifying fire weather concerns given the warming trend. Lower coastal regions, however, are anticipated to see more breathable numbers with temperatures in the continuous caress of the 60s along the Pacific coast.

Officials urge those at risk, such as children, the elderly, pregnant women, and outdoor workers, to take the dangers of heat-related illnesses seriously and recommend preventive measures like drinking plenty of water, wearing light-colored clothing, and seeking shade wherever possible. "Moderate HeatRisk means that most individuals (especially if you work outside) will be impacted by heat, especially if you don’t have adequate cooling and/or adequate hydration," the NWS San Francisco cautioned in its alert.

From an aviation and marine standpoint, normal to favourable flying conditions are expected around San Francisco with some variations due to stratus clouds being shooed away by morning, according to a morning update from the National Weather Service San Francisco. At the same time, fresh to strong northwesterly gusts will stir the waters Wednesday through Thursday, and mariners navigate as they always have through the unpredictable whispers and roars of our living ocean. A coastal jet off of Point Reyes will likely lead to near gale force gusts for the northern coastal waters, affecting small craft advisories, which should improve by Friday as the winds drop to a more placid state over the weekend.