Miami woke up to clear, sticky air on Thursday, July 9, 2026, with temperatures already parked in the mid-80s before breakfast. By late morning, the real trouble arrives: the National Weather Service has South Florida under a Heat Advisory from 11 a.m. to 7 p.m., warning that the heat index could spike between 105 and 110 degrees during the hottest part of the day, according to the National Weather Service in Miami.
Afternoon Heat And Winds
Afternoon temperatures are expected to top out near 91 degrees, with southeast winds around 10 to 15 mph. That breeze will not do much for comfort, since it will help keep humidity high and make it feel significantly hotter than the actual air temperature. With little to no meaningful rain in the forecast, your best bets for relief are shade, air conditioning, or both.
Outdoor work or workouts are safest in the early morning or later in the evening. The bulk of the dangerous heat is expected during the advisory window from late morning through early evening, in line with the outlook from the National Weather Service in Miami.
Cooling Centers And Safety
City and county officials have cooling centers open for anyone who needs a place to cool down during the extreme heat season. The City of Miami operates 11 park locations, and Miami-Dade County adds library and community sites with air-conditioned space.
If you are heading out into the heat, bring plenty of water, wear light, loose-fitting clothing, and steer clear of strenuous activity between 11 a.m. and 7 p.m. A full list of cooling center locations and hours is available from the City of Miami.
Late Week Outlook
The pattern starts to shift Friday into Saturday as deeper moisture returns and daily storms make a comeback. A chance of showers and thunderstorms develops after 9 a.m. on Friday, July 10, with scattered to numerous storms possible by Saturday, and some of those storms could turn strong.
Friday will still be hot, with a high near 90 degrees and a heat index likely in the mid-100s. East winds could gust to around 20 mph. For the complete forecast and any updated advisories or warnings, check the latest from the National Weather Service in Miami.
