Persistent marine layer conditions along the California coast continue to moderate temperatures in San Francisco, with the cool, moist onshore flow from the Pacific keeping daily highs near or slightly above seasonal norms around 70°F. Recent model guidance shows a compressed or lingering layer through the morning, limiting afternoon warming and creating close competition between the 70-71°F and 72-73°F bins as the primary resolution thresholds. Subtle differences in wind patterns, layer depth, and any localized clearing will determine whether peak readings edge higher, while typical August variability and the absence of strong high-pressure ridging support the tight market distribution across these outcomes. Updated National Weather Service forecasts this afternoon will provide the final observational data for market resolution.