Recent forecasts from the National Weather Service and other models point to a shallow marine layer and moderate onshore flow keeping San Francisco’s overnight minimum near seasonal norms, with the exact low hinging on stratus coverage and wind strength that limit radiative cooling. A building ridge has produced slightly above-average daytime warmth, yet the persistent California Current and coastal upwelling maintain ocean temperatures in the mid-50s, capping how much the air mass can warm overnight. Model spreads reflect uncertainty in marine-layer depth and timing of any clearing, which directly influences whether the low settles in the mid-to-upper 50s or edges into the lower 60s. Historical August minima average 56 °F, and current conditions show no strong offshore flow or clear-sky radiative setup that would push readings notably lower.