Current National Weather Service forecasts for San Francisco on August 30 point to a high near 66°F under partly cloudy skies, shaped by a persistent marine layer, strong onshore southwest flow, and cool adjacent Pacific waters near 55–58°F that limit afternoon warming. This setup, typical for late summer, produces sea breezes and stratus that cap maxima well below the ~70°F climatological average at SFO, where the market resolves. Minor model differences in the timing of any clearing or wind strength create the tight clustering around the 66–69°F bins, with traders assigning the highest implied probabilities to those ranges as the most consistent with official guidance and recent observational trends. Updated model runs and morning observations tomorrow will refine the exact peak.