Monday is starting warm and sticky across Miami, with clear skies and temperatures already near 84°F at Miami International Airport as of 5:35 a.m. The real story, though, is what that heat will feel like once the afternoon humidity and a strengthening south wind kick in.
The National Weather Service has a Heat Advisory in place for Miami‑Dade and Broward counties from 11 a.m. to 7 p.m. Monday, July 20, with heat‑index values expected to soar to between 104°F and 108°F, according to NWS Miami. Officials are urging residents to drink plenty of water, use air conditioning if they have it, and go easy on outdoor work or exercise during the hottest part of the day.
Afternoon Storms Mostly Inland
There is a slight chance of showers and a few isolated thunderstorms from late morning into early afternoon, mainly over interior areas and near Lake Okeechobee. Any storms that do pop up should stay scattered. A passing cell could briefly dump heavy rain and kick up gusty winds, but forecasters are not expecting widespread severe weather.
Winds And Boating Conditions
South winds will ramp up to around 15 to 18 mph this afternoon with gusts reaching into the low 20s. That breeze will shove the worst of the heat inland while keeping the coastline steamy. Boaters can look for choppy waters and occasional stronger gusts offshore. A Small Craft Advisory is posted for parts of the Gulf waters today, with seas running around 2 to 4 feet.
Where To Cool Off
The City of Miami and Miami‑Dade County run a network of cooling centers during stretches of extreme heat, with locations and hours listed on the city’s cooling centers page. Anyone needing a break from the heat is encouraged to head to an air‑conditioned public site, keep water close by, and check in on older neighbors and pets throughout the day. For local assistance and information, residents can call 311.
What To Expect This Week
Forecast guidance suggests a slightly drier air mass arrives Tuesday, which could cut back on shower coverage for a bit, but temperatures will still stay hot with highs near or above 90°F through the week. Forecasters note that more Heat Advisory days are possible as humidity ramps up again, so it is a good idea to plan outdoor jobs, workouts, and events around the afternoon peak.
