Jacksonville is starting Tuesday mostly clear and already near 79 degrees, but the easy morning setup will give way to dangerous afternoon heat. A Heat Advisory runs from noon to 7 p.m., with a high near 95 and heat index values reaching as high as 110.
Heat Peaks Before Storm Chances
Mostly sunny skies will push temperatures into the mid-90s, with west winds of 3 to 8 mph. The National Weather Service in Jacksonville says a 30% chance of showers and thunderstorms arrives after 3 p.m.; stronger storms could bring frequent lightning, brief heavy downpours and wind gusts of 40 to 50 mph, though coverage is expected to be greater near Southeast Georgia than in Jacksonville.
For Jacksonville and nearby inland neighborhoods, the bigger concern is heat exposure, especially for people working outside, exercising or waiting at bus stops during peak heating. City guidance recommends drinking plenty of fluids, staying in air conditioning when possible, avoiding direct sun and checking on relatives and neighbors; the city's Stay Cool Jax page lists cooling-center information when the local heat response is activated.
Warm Nights Keep The Heat Going
Tonight will remain muggy, with a low around 78 and a slight chance of storms before 9 p.m. Skies should turn partly cloudy, but heat index values could still reach 105 overnight.
Mid-90s Continue Through The Weekend
Wednesday through Monday stays hot, with highs generally from 95 to 97 degrees and heat index values near 105 to 110. Afternoon and evening storm chances rise to roughly 40% to 50% Wednesday through Saturday, then ease somewhat Sunday and Monday, while additional heat advisories are possible most afternoons.
Friday looks like the hottest day in the current forecast, with a high near 97, followed by another 96-degree Saturday. At Northeast Florida beaches, the rip-current risk is moderate Tuesday before dropping to low from Wednesday through at least Saturday, so swimmers should check beach conditions before heading into the water.
