South Florida Weekend Forecast: Heat Index Near 100°F with Thunderstorms Through Monday

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Miami, Florida – Scattered afternoon thunderstorms could snarl traffic and disrupt weekend plans across South Florida, with the National Weather Service warning of a daily 30–50% chance of storms through Tuesday.

According to the NWS Miami office, storms are most likely between 1 p.m. and 6 p.m. each day, with heavy downpours, lightning, and brief gusty winds expected. Highs near 90°F and heat index values pushing 100°F will add to the discomfort, especially in Miami, Hialeah, and Fort Lauderdale.

The risk is greatest during afternoon peak hours, with storm cells potentially impacting I-95, U.S. 1, and major beach corridors from Sunny Isles to South Beach. Storms may develop rapidly and could cause brief urban street flooding in low-lying or poorly drained areas.

Winds remain light through the period, generally from the east or southeast at 6 to 10 mph. Residents are advised to stay weather-aware, avoid outdoor plans during the mid-afternoon, and charge mobile devices in case of lightning-related outages.

This pattern of heat and pop-up storms continues through at least Tuesday, with slightly drier air possible by midweek.

Five Day Forecast for Miami, FL:

  • Saturday: 40% chance of storms, high near 89°F
  • Sunday: 50% chance of storms, high near 90°F
  • Monday: Sunny, then 50% chance of storms, high near 90°F
  • Tuesday: 50% chance of storms, high near 90°F
  • Wednesday: 30% chance of storms, high near 91°F