This Weekend's South Florida Forecast: What to Expect Across Miami-Dade, Broward & Monroe Counties

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Posted May. 15, 2026, 6:21 AM

South Florida residents heading outdoors this weekend should be prepared for classic late-season conditions across Miami-Dade, Broward, and Monroe counties, with warm temperatures, high humidity, and the possibility of afternoon storms keeping forecasters busy.

Miami-Dade County

Expect highs near 89°F Saturday and Sunday, with partly cloudy skies giving way to scattered afternoon and evening thunderstorms — typical of the region's weather pattern. Morning hours will offer the best window for outdoor activities before storm cells develop. Overnight lows will dip to around 76°F. Winds will be light out of the southeast at 10–15 mph.

Broward County

Broward will see similar conditions, with highs topping out around 88°F both days. A 50–60% chance of afternoon showers and thunderstorms is in the forecast, particularly between 2 p.m. and 7 p.m. Residents along the coast can expect moderate surf and a light sea breeze providing some relief from the heat. Overnight lows near 75°F.

Monroe County (Florida Keys)

The Keys will enjoy slightly lower humidity compared to the mainland, with highs around 86°F and a gentle easterly breeze at 10–20 mph. Boaters and water enthusiasts should note a small craft advisory may be in effect, with seas running 2–4 feet offshore. Isolated showers are possible Saturday afternoon, with Sunday looking marginally drier.

What to Watch For

Forecasters are monitoring a broad area of atmospheric moisture moving through the region, which could enhance storm activity, particularly Saturday evening. Residents should stay weather-aware, especially if attending outdoor events. Lightning safety remains a priority — when thunder roars, go indoors.

For the most up-to-date conditions, check the National Weather Service Miami office at weather.gov or your local news broadcast.