Persistent marine-layer stratus and onshore sea breezes driven by strong Pacific upwelling continue to moderate San Francisco temperatures on August 8, 2026, producing the market’s broad distribution centered on 68–73 °F. National Weather Service and ensemble guidance indicate a daily maximum near 70–71 °F at KSFO under partly cloudy skies and light westerly flow, consistent with the long-term August climatology of 69 °F. Limited ridging aloft offers modest warming potential that could reach the low 72 °F range if marine influence weakens, while stronger onshore flow or earlier fog burn-off keeps readings in the upper 60s. Model spread and microclimate variability across the city sustain roughly even probabilities across the three central bins, with only remote chances assigned to 74 °F-plus outcomes that would require atypical offshore flow.