San Francisco Forecast: Persistent Marine Layer to Keep Highs Below 74°F on August 27, 2026
San Francisco's weather on August 27, 2026, is expected to be influenced by a persistent marine layer, which will likely suppress daytime highs. According to the National Weather Service (NWS) Bay Area, the high temperature is projected to remain in the 68-71°F (20-22°C) range, falling short of the 74-75°F (23-24°C) bracket that had been a leading forecast probability. The city's microclimate, shaped by cold Pacific upwelling and the marine layer, often keeps summer temperatures cooler than expected. The NWS will provide official temperature readings to confirm the day's high, with updates sharpening as the date approaches. Source time: not specified. 
