Saturday, May 16, 2026: Miami rolled out of bed to clear skies and that familiar wall of warm air, with Miami International Airport clocking about 75°F and a light east breeze. By this afternoon, expect it to turn full-on steamy, with sun, muggy air, and a high near 85°F. Heat indices are set to spike into the upper 90s to around 100°F in some inland neighborhoods, and there is a slight chance of showers and isolated thunderstorms after 11 a.m., mainly over interior South Florida.
Overnight into early Sunday, May 17, forecasters are watching a small window for storms between 2 a.m. and 4 a.m. before activity scatters out. Temperatures will barely budge, with lows near 81°F as easterly winds strengthen and keep the air feeling more like a hair dryer than a night breeze.
Afternoon Storms Stick Inland
Any storms that do fire up will ride the sea breeze and are expected to stay mostly over inland neighborhoods and across southwest Florida. They could bring frequent lightning and brief heavy downpours. Widespread severe weather is not on the table, but brief gusty winds could knock down visibility and trigger localized street flooding, so drivers should be ready to slow down and splash through it carefully. East winds climb through the weekend, into the 10 to 15 mph range with gusts near 20 to 25 mph by Sunday.
Coastal Hazards
The National Weather Service Miami is flagging a high rip current risk for parts of the Palm Beaches and a moderate risk for many Atlantic beaches. Swimmers are urged to stay near lifeguards and obey the flags, even if the water looks inviting. Boaters should also be ready for choppier seas as those easterly breezes stiffen along the coast.
Beat The Heat
Inland, the heat indices in the upper 90s to around 100°F will raise the risk of heat-related illness during the peak afternoon hours. Miami-Dade County runs a network of cooling sites and community centers where residents can duck out of the worst of the heat, with locations listed on the county website, according to Miami-Dade County.
This update keeps the warming trend we flagged when Miami was set to sizzle as soupy heat locked in for days, but now throws in a near-term surf hazard for parts of Palm Beach County. If you are planning to be outside, aim for morning or evening, carry water like it is your new best friend, and let lifeguards and local forecasts call the shots on any beach or boating plans.
