Current short-range forecast guidance from the National Weather Service shows Miami’s overnight low on May 18 stabilizing in the mid- to upper-70s under a typical late-spring subtropical ridge. Persistent warm Gulf and Atlantic waters near 80 °F limit nocturnal cooling, while light easterly flow and partly cloudy skies suppress radiational drops. Ensemble model spreads remain modest, with the 10th–90th percentile range centered on 76–80 °F; deviations hinge on exact timing of any weak frontal moisture or afternoon convective outflow. Historical May minima average 73 °F, yet recent years have trended warmer, aligning with the market’s clustered probabilities around 76–83 °F. Updated model runs tonight and tomorrow morning will provide the final resolution inputs.