Bay Area/ San Francisco

San Francisco Anticipates Warmer Weather as Inland Areas Brace for Heat Spike

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Published on August 18, 2025
San Francisco Anticipates Warmer Weather as Inland Areas Brace for Heat SpikeSource: Yourusernamewillbepublic2, CC0, via Wikimedia Commons

San Francisco residents can expect to see a climb in temperatures as the week progresses, according to the National Weather Service San Francisco CA, with forecasts indicating moderate heat risk in the inland areas from Thursday through Saturday, wayswept and weather-willed, we find mercy in the slight cooling that the weekend promises, but it's clear that the balmy days will stretch their arms into the next work week.

Highs are looking to peak in the low 90s in the far interior, while coastal areas like ours are keeping to the more comfortable 60s and 70s, "Winds will also begin to back off today," the National Weather Service noted this morning, and while the SF Bay might see some clouds lingering, our southern neighbors in Half Moon Bay can enjoy clear skies, much to the envy of the fog-cloaked citizens, we are often reminded by nature, of our place within it, that which we cannot control but only respond to.

This trend follows a compressing marine layer, and as the upper-level pressure ridge strengthens, inland valleys might see temperatures rising into the 100s — with some "isolated areas in the Santa Lucias could break into the 110s," the NWS warns.

But not all is fire and heat; those heading to the coast might appreciate, aside from the cooler airs, a bit of a show from Mother Nature, "The astronomical set up will give us a bit more movement in the tides into the  mid week," wherein high tides brush close to coastal flooding criteria, without quite inviting a flood advisory, and despite these predictions, the NWS suggests a slight cooling down as onshore flows comfort us once more, ever so slight, into the weekend, reminding us that the Bay embraces us within cycles larger and more enduring than our current concerns.

As for the flyers and sailors among us, aviation and marine conditions appear favorable, with NWS's marine forecaster, Sarment, highlighting "Localized minor coastal flooding will likely occur in Bayside Marin County through Sunday, August 24th as high tides will remain in excess of 6.0 feet." Boaters should be aware of moderate to strong northwesterly breezes, particularly along the coastal jet regions like Point Reyes and Point Sur over the coming days and small craft advisories have already been issued, our city by the Bay, quite familiar with the whims of wind and water, prepares its sails accordingly.

For a detailed day-by-day outlook, the 7 Day Forecast promises mostly sunny days ahead with highs ranging from the mid-60s to high 70s, and those in San Francisco can ready themselves for clear skies and bearable winds — gusts peaking at 21 mph today, calming slightly but persisting through the week.