**Forecast models from the National Weather Service and private sources converge on a Seattle high of 80–82°F for August 14, 2026, driven by mostly sunny skies after early sprinkles, light southwesterly winds, and persistent marine air moderating daytime heating.** This places the highest probability on the 80–81°F and 82–83°F bins, consistent with the market’s leading outcomes. The broader Pacific Northwest summer has run warmer than average, yet zonal flow aloft and onshore Pacific influence prevent stronger inland heating on this particular day, keeping values near or slightly above the mid-August climatological mean of ~77–79°F. Key uncertainties include the exact timing and extent of any marine layer or cloud cover, which could shave a degree or two, versus clearer conditions allowing brief additional warming. Official guidance will be updated with the next NWS model runs and morning observations.