Sunday morning, May 10, 2026, Miami woke to clear skies and air that felt more like a steam room than a spring morning. Temperatures hovered around 81°F at Miami International Airport (KMIA) with dew points near 75°F, so there was barely any overnight relief. A light southeast breeze is keeping the coast only a few degrees cooler than inland neighborhoods, and highs are set to climb again this afternoon.
Heat Through Monday
Forecasters say the heat will be the main story through Monday. According to the National Weather Service in Miami, there is a high (level 4 of 5) chance of heat‑related impacts across South Florida. Afternoon highs will stay in the upper 80s to lower 90s near the coast and rise into the mid‑to‑upper 90s inland. Paired with dew points in the mid‑70s, heat indices should peak around 100–105°F.
If you have outdoor plans, pace yourself. Build in extra water breaks, find shade whenever you can and check on older adults, children and pets who may struggle in this kind of heat.
Storms Increase Tuesday
Showers and isolated thunderstorms are possible late this afternoon and evening, but the wetter pattern really kicks in Tuesday as a frontal boundary pushes through and rain chances climb sharply. Tuesday into Wednesday carries the highest chance for showers and thunderstorms and could bring a few stronger, gusty cells with brief, heavy downpours and isolated urban flooding depending on timing.
If you are planning midweek outdoor events, keep plans flexible and have an indoor backup ready in case storms move through during peak activity times.
Where To Find Relief
Miami‑Dade County operates public cooling sites and community centers during the heat season. Before you head out, check updated locations and hours on the Miami‑Dade cooling sites page.
For beachgoers and boaters, the light southeast wind should keep seas modest this morning, but afternoon storms can quickly bring gusty winds and choppy conditions. If you or someone with you starts feeling dizzy, confused or weak while outdoors, move to a cool place right away, hydrate and seek medical help if symptoms do not improve.
Bottom line: expect another hot, sticky Sunday and Monday, followed by a higher chance of showers and thunderstorms Tuesday into Wednesday. Updates will follow if any heat headlines or advisories are issued.
