Thunderstorms, Flooding For South Florida

MIAMI, FL — The National Weather Service in Miami has issued a forecast of scattered to numerous showers and thunderstorms across South Florida today, Sunday, August 31, 2025, with rain chances favoring the interior areas amid near-normal temperatures.

A few storms may become strong to marginally severe this afternoon into evening, capable of producing gusty and erratic winds up to 35 mph, heavy downpours, and frequent lightning. Excessive rainfall could lead to isolated urban and poor drainage flooding, with reduced visibility.

Temperatures will reach 90 to 94°F, with high humidity amplifying heat indices over 100°F, potentially approaching 108°F.

Rainfall chances today are moderate to high, with Palmdale at 73%, Clewiston at 70%, West Palm Beach at 65%, Immokalee at 70%, Naples at 64%, Everglades City at 68%, Fort Lauderdale at 69%, Miami at 73%, Homestead at 70%, and Flamingo at 63%, according to the NWS forecast. These probabilities show scattered to numerous shower and thunderstorm activity across South Florida, with potential for localized heavy rainfall.

Storm Timing:

• Morning: Widely scattered thunderstorms
• Late afternoon into evening: Increased coverage of showers and thunderstorms

Possible Hazards:

• Heavy downpours with poor visibility
• Localized urban flooding, especially in urban areas and roadways
• Gusty, erratic winds from strong storms up to 35 mph
• Frequent lightning strikes

National Weather Service Miami South Florida Doppler Radar

Miami Weather Forecast

Today

A chance of showers and thunderstorms, mainly this afternoon. Mostly sunny, with a high near 91°F. Heat index values as high as 103°F. Southeast wind 6 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Tonight

A 30 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 82°F. Southeast wind around 6 mph.

Monday

A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 91°F. Heat index values as high as 103°F. Southeast wind 6 to 10 mph.

Monday Night

A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 82°F. Southeast wind 3 to 6 mph.

Tuesday

A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91°F. Light and variable wind becoming southeast 5 to 7 mph in the morning.

Tuesday Night

A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 82°F. Southeast wind around 6 mph.