The National Weather Service in San Francisco has issued a Heat Advisory in effect from 11 AM to 7 PM today, urging residents to find relief from the elevated temperatures, which are expected to hit the 90s in many interior locations and potentially break the 100-degree mark in some spots. Coastal areas can anticipate highs ranging from the 70s to mid-80s under mostly sunny skies, transitioning to increased cloud cover as the day progresses, with a call to stay hydrated and seek cooler environments during this period, as detailed in a report published by NWS San Francisco.
Moreover, an impending change in weather conditions is on the horizon with weak offshore flow persisting through Tuesday in higher terrains, and chances of rain showers along with an isolated thunderstorm making a comeback late tonight, continuing through Wednesday, indicative of a shift that will usher in more seasonal weather by the end of the week, the National Weather Service predicts, leading us into a weekend that aligns closer to what one would expect this time of year.
In parallel, a social media post from the NWS Bay Area relayed a succinct reminder: "A Heat Advisory goes in effect from 11am to 7pm today. Be sure to find ways to beat the heat, stay hydrated, and be prepared for a cool down and some rain chance late tonight and tomorrow!"
A Heat Advisory goes in effect from 11am to 7pm today.
— NWS Bay Area 🌉 (@NWSBayArea) September 23, 2025
Be sure to find ways to beat the heat, stay hydrated, and be prepared for a cool down and some rain chance late tonight and tomorrow!#CAwx pic.twitter.com/SJaNe83558
