Recent National Weather Service and model guidance point to marine air returning Wednesday behind Tuesday’s offshore flow and thermal trough, moderating highs in Seattle to the mid-to-upper 70s under partly sunny skies. This aligns with the market’s strongest implied probabilities on 78–79 °F (39.5 %) and 76–77 °F (28.5 %), well above the long-term August 26 average of 75.5 °F yet below the hotter ridge-influenced readings expected Tuesday. Ensemble consistency and the timing of the onshore push leave only modest room for 80–81 °F outcomes (16.5 %), while probabilities drop sharply outside the 74–81 °F window as cooler, cloudier conditions are expected to lock in by midday. Updated model runs and any last-minute stratus timing will be the key near-term variables.