MIAMI, Florida – The National Weather Service in Miami forecasts scattered showers and thunderstorms developing late this morning and into the afternoon, favoring inland South Florida. A slight chance of showers and thunderstorms is expected today. Any stronger cells may produce gusty winds, heavy downpours, localized flooding in poor drainage areas, frequent lightning, and small hail. Frequent lightning will be the primary hazard where storms develop. Today’s South Florida Rain Chances Today's South Florida Rain Chances – Valid Saturday, July 18, 2026 Rain chances (Saturday, July 18, 2026): Slight chance (around 20%) overall, with the best chances inland and during the afternoon. West Palm Beach: ~25-30% Fort Lauderdale: ~20-25% Miami: ~20% Palmdale: ~25% Immokalee: ~20-25% Clewiston: ~20-25% Homestead: ~20% Naples: ~15-20% Everglades City: ~10-15% Flamingo: ~10% NWS Miami South Florida Doppler Radar Heat Continues Today High temperatures will rise into the upper 80s to low 90s across most of South Florida. Peak Heat Index Values will range up to 103°F this afternoon, with the highest readings across urban metro areas including Miami, Fort Lauderdale, and West Palm Beach. Maximum Heat Index – Saturday Afternoon, July 18, 2026 No Heat Advisory is currently in effect. Miami Weather Forecast Today (Sat) A slight chance of showers and thunderstorms after 10am. Partly sunny, with a high near 89. Heat index values as high as 103. South wind 9 to 13 mph, with gusts as high as 18 mph. Tonight Partly cloudy, with a low around 84. South wind around 11 mph. Sunday A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Heat index values as high as 105. South wind 11 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 20%. Sunday Night Partly cloudy, with a low around 84. South wind 10 to 13 mph. Monday A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. South wind 11 to 15 mph, with gusts as high as 21 mph. Monday Night Partly cloudy, with a low around 84. Southeast wind 9 to 13 mph. Tuesday Mostly sunny, with a high near 90. South wind 11 to 13 mph. Tuesday Night Partly cloudy, with a low around 82. Southeast wind 7 to 9 mph. Wednesday Mostly sunny, with a high near 91. Southeast wind 7 to 10 mph.