National Weather Service forecasts highlight a persistent marine layer and moderate onshore flow as the dominant influences keeping San Francisco's July 10 high likely in the mid-to-upper 60s. Model consensus points to morning clouds giving way to partial sunshine, with sea breezes strengthening by afternoon to cap warming near the coast. This setup aligns with historical July patterns where coastal locations average around 67°F, well below inland values. The near-even market split between 66-67°F and 68-69°F reflects uncertainty in exact burn-off timing and wind strength, both of which can shift the peak by 1-2°F. Updated NWS guidance and morning observations will provide the clearest signals ahead of resolution.