Orlando/ Weather & Environment

Orlando Heat Advisory And Thunderstorm Forecast Wednesday

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Published on August 19, 2026
Orlando Heat Advisory And Thunderstorm Forecast WednesdaySource: Benoît Prieur, CC0, via Wikimedia Commons

Orlando woke to clear skies and temperatures around 79 degrees Wednesday, but the calm start is a brief prelude to a dangerous heat-and-storm combo. A Heat Advisory runs from 10 a.m. to 8 p.m., with the heat index expected to reach 108 to 112 degrees before thunderstorms move in later in the day.

Heat Peaks Before Afternoon Storms

Mostly sunny skies will push temperatures toward a high near 97 degrees, with the heat index making it feel closer to 109. According to the National Weather Service in Melbourne, showers and thunderstorms become likely after 1 p.m., with the best chance arriving from midafternoon into early evening.

Storms could bring frequent lightning, brief wind gusts of 45 to 55 mph and heavy downpours. Forecasters say rainfall of 1 to 3 inches could fall quickly in some spots, creating the possibility of localized flooding and sudden road trouble.

Tonight Stays Muggy Before Thursday Repeats The Pattern

Storm chances remain elevated into Wednesday night, especially before 10 p.m., while skies turn partly cloudy and temperatures settle near 78 degrees. Thursday will look familiar: mostly sunny conditions early, a high near 96, a heat index up to 107, and a 60% chance of afternoon and evening thunderstorms.

Daily Storm Chances Continue Through Tuesday

Friday should reach about 95 degrees with storms likely after 2 p.m., followed by highs near 94 from Saturday through Sunday. Rain chances then ease somewhat Monday and Tuesday, but afternoon thunderstorms remain possible, with temperatures still hovering in the mid-90s.

Heat Safety Remains The Main Assignment

Drink plenty of water, take frequent breaks in shade or air conditioning, and move strenuous outdoor plans to early morning or evening. The Heat Advisory also urges residents to wear lightweight clothing and never leave children or pets in vehicles; during storms, head indoors at the first sound of thunder.