Miami started Thursday, June 11 feeling more like mid-afternoon than sunrise, with clear skies and a muggy 79°F (26°C) already on the board at Miami International Airport. By midday, temperatures are expected to jump into the mid to upper 80s, and the humidity will crank up the heat index to around 100°F this afternoon. An umbrella is a smart accessory, since isolated to scattered afternoon storms are likely to flare up, especially inland and over the southwest side of the metro.
This Afternoon
There is a slight chance of showers before 10 a.m., followed by scattered storms bubbling up through the afternoon and into early evening. Any storm that forms can drop brief heavy rain and kick up gusty winds. East winds of 7 to 12 mph should keep the coastline on the breezy side, while spots farther inland carry the best odds of getting a storm. According to the National Weather Service Miami, the chance of precipitation sits at about 20% today, with the strongest storms most likely inland and across southwest Florida.
Weekend Heat And Rain Chances
Rain chances climb on Friday and into the weekend as southeasterly low level flow returns and drags in more tropical moisture. Highs are expected to stay in the upper 80s to near 90, while heat indices could reach 100 to 105 on Friday and through the weekend. That level of heat and humidity raises the risk of heat stress, especially for people who work outdoors or who do not have regular access to air conditioning. If you need a place to cool off, the City of Miami website hosts a cooling centers page with locations and hours for the extreme heat season.
Beaches And Boaters
Onshore winds should keep the surf generally modest, but any nearby thunderstorms can quickly churn up choppy conditions and raise the rip current risk along Atlantic beaches. The flags posted by lifeguards remain the most reliable local signal of what is safe. Small craft can encounter locally hazardous winds and rougher seas in and near squalls this afternoon, so boaters should keep tabs on marine forecasts and radar. If you hear thunder or spot lightning, it is time to get out of the water, since storms often pop up fast during the hottest part of the day.
What To Do
Stay hydrated by carrying water, try to schedule strenuous outdoor plans for the morning or evening, and keep your phone charged so you can track fast developing storms on radar. Beachgoers should stick to lifeguarded areas and follow the flag warnings. If you or someone nearby starts to feel faint or dizzy, move to a cooler spot right away and call 911 if symptoms get worse. There are no watches or warnings in effect for the metro area at the moment, but conditions may change quickly as the weekend unfolds.
