USA Miami Weather Forecast Today (May 28, 2026): Expect another day of extreme heat and humidity in Miami and much of South Florida, with temperatures staying above seasonal averages.

Forecasters expect daytime highs to climb into the upper 80s and low 90s Fahrenheit, while the heat index could make conditions feel even hotter during the afternoon hours. Weather experts say the combination of tropical moisture and light winds is creating uncomfortable outdoor conditions across the region.

Meteorologists have warned residents to stay hydrated and avoid extended exposure to direct sunlight, especially during peak afternoon hours. The hot and muggy weather pattern is expected to continue into the weekend, with little overnight cooling in urban areas, including downtown Miami and Miami Beach. Local forecasts indicate that "feels-like" temperatures may continue reaching the mid-90s due to elevated humidity levels.

Heavy Rain and Thunderstorm Chances Increase

Alongside the heatwave-like conditions, South Florida is also preparing for periods of heavy rain and thunderstorms. Forecasters are tracking deep tropical moisture moving north from the Caribbean and Gulf regions, increasing rain chances across Miami-Dade County. Scattered showers began developing early Thursday morning, with stronger thunderstorms expected later in the afternoon and evening.

Weather agencies estimate rain chances between 60% and 70% across parts of South Florida through Friday. Some storms may produce torrential downpours, lightning, gusty winds, and localized flooding in low-lying neighborhoods and poorly drained streets. Flood advisories were already issued Thursday morning after several areas received nearly three inches of rainfall within a short period.

Meteorologists say the weather pattern may continue through early next week. Although the rain could provide temporary relief from the heat, humidity levels are expected to remain high, keeping conditions sticky and uncomfortable across the Miami metropolitan area.

Flooding Risks and Travel Concerns

Heavy rain bands moving through South Florida have increased concerns about urban flooding and traffic disruptions. Officials are urging drivers to remain cautious during evening commutes as roads could quickly become waterlogged during sudden downpours. Several flood advisories were issued near downtown Miami and the Florida Keys after repeated thunderstorms moved across the area.

Beachgoers are also being advised to monitor rip current warnings and changing weather conditions before entering the water. Strong onshore winds and thunderstorms may create hazardous conditions along coastal areas during the late afternoon hours.