The Bay is bracing for a sweltering couple of days, as the National Weather Service in San Francisco issued advisories for high temperatures and fire weather risk. According to NWS San Francisco's latest report, inland areas could see highs from the 90s to near 102 degrees today, while coastal areas remain significantly cooler with persistent stratus along the coast. Those in the Bay Area and Central Coast are advised of a patchy Moderate HeatRisk and cautioned to expect a moderate risk of heat-related illnesses for sensitive groups such as children, the elderly, pregnant women, and outdoor workers without adequate hydration or cooling. The NWS provided heat safety tips, including the need to stay hydrated, wear lightweight clothing, reduce outdoor time or find shade, never leave anyone in vehicles, and use sunscreen.
Denser complications cloud the already hot conditions. A social media update from NWS Bay Area warns of a Dense Fog Advisory effective through 10 AM for the Central Coast, Monterey Bay, and North Bay Interior Valleys. With visibility reduced, hazardous driving conditions may plague drivers, and mariners are expected to have difficulty navigating. Localized elevated fire weather threats continue to lurk above areas less influenced by coastal dampness, with the higher terrain seeing diurnally driven fire conditions due to low daytime humidities and possible gusts up to 30 mph.
Dense Fog Advisory in effect through 10AM for the Central Coast, Monterey Bay, & North Bay Interior Valleys. Thus, drivers & mariners will be impacted. Please take the proper precautions as low visibility could make driving conditions hazardous & will make navigation difficult. pic.twitter.com/ycRnFVcisb
— NWS Bay Area 🌉 (@NWSBayArea) July 10, 2025
The long-term outlook provides a glimmer of relief; an upper-level trough developing over the eastern Pacific into the West Coast is anticipated to trigger a gradual cooling trend starting the middle of next week. This break is needed as inland regions experience a sustained heat wave through the weekend, though slight temperature reductions are expected.
In the meantime, the aviation sector won't be spared from nature's inconveniences. The National Weather Service detailed a compressing marine layer, bringing about IFR/MVFR ceilings that should lift by late morning but will return by evening. Travelers passing through SFO can expect occasionally breezy onshore winds this afternoon, and mariners are prepped for persistent moderate to strong winds today, with gale strength forecasted in the northern outer waters. These winds contribute to rough seas, making for choppy conditions that will thankfully start to subside as the weekend approaches.
