Current National Weather Service and model consensus forecasts point to an overnight low of 80–82°F in Miami for the night of August 18–19 under clear skies and light southerly winds, supporting the market’s leading 80–81°F outcome at 48.5% implied probability. Persistent warm, humid air from the Gulf of Mexico limits radiational cooling, while the urban heat island effect and absence of frontal passages or tropical moisture keep minimum temperatures above the August climatological average of ~78°F. Recent observations show no significant deviations from this pattern, with forecasters noting only minor model spread around 79–81°F. Updated evening soundings and any late adjustments to wind or cloud cover remain the primary near-term catalysts that could shift probabilities before resolution.