Miami started Thursday mostly cloudy, and by 1:53 p.m. Miami International Airport was 86 degrees, with a west wind at 8 mph. The National Weather Service’s afternoon forecast calls for a chance of showers and thunderstorms.
Afternoon Showers Could Interrupt Outdoor Plans
Mostly cloudy skies are forecast Thursday, with showers and thunderstorms possible. Across South Florida, the NWS forecasts precipitation chances of 20% to 40% and thunder chances of 10% to 20%. Locally heavy rain or an isolated gusty storm remains possible, though confidence in minor urban flooding is low.
No warnings or advisories are in effect for Miami.
A Stronger Front Arrives Before Friday Morning
A stronger cold front is expected to move through South Florida during the pre-dawn and early-morning hours Friday. The NWS expects any prefrontal showers to be light, with rain chances no higher than 10% overnight and near zero after daybreak. Friday will turn partly sunny.
This is a stronger system than the weak boundary crossing South Florida Thursday: the NWS Miami discussion traces the change to an upper-level trough and surface low moving east, and says the front should bring South Florida its first chilly air mass of the fall. Prefrontal showers are expected to be brief and light, with rain chances no higher than 10% overnight and near zero after daybreak Friday.
Friday’s high is forecast near 81 degrees in Miami, with temperatures dropping to around 60 degrees Friday night. Saturday is forecast sunny, with a high near 72 degrees. The National Weather Service forecast points to a cooler, breezier day.
Sunday Brings Drier, Warmer Weather
Sunday is forecast mostly sunny, with a high near 78 degrees, according to the National Weather Service.
The cold front is a short-term change; the broader seasonal outlook points to a potentially stormier winter. The NWS South Florida 2026-27 dry-season outlook says a very strong El Niño is likely to tilt the season wetter and stormier than normal, with above-normal precipitation favored from January through April. The outlook stresses that seasonal forecasts shift probabilities; they do not guarantee specific storms or local weather on a given day.
