Miami woke up in full-on sauna mode Monday, June 15, 2026, with partly cloudy skies and temperatures stuck in the low 80s. Dew points are in the mid 70s and overnight lows barely dipped below 80°F, setting the stage for a quick warmup. A Heat Advisory is in effect as a late-afternoon sea breeze moves in, helping to fire up scattered storms after about 2 p.m. EDT on Monday.
Heat Advisory Details
The National Weather Service has a Heat Advisory in place for coastal and metropolitan Miami-Dade and Broward counties from 11 a.m. to 6 p.m. EDT Monday, June 15, 2026. Forecasters expect heat-index values to reach roughly 103–107°F in the advisory area, which raises the risk of heat-related illnesses for outdoor workers and vulnerable residents. The agency urges people to drink plenty of fluids, stay in air-conditioned spaces when possible, and check on neighbors, according to National Weather Service Miami.
Afternoon Storms And Flood Risk
Scattered showers and thunderstorms are most likely after about 2 p.m. EDT Monday, with the highest coverage inland and across western neighborhoods. Storms will move slowly and could drop brief, heavy downpours that trigger localized urban and poor-drainage flooding. A few stronger cells may bring gusty winds and quick drops in visibility. Anyone with outdoor plans should be ready for fast-changing conditions, as a short, intense shower might cool the air but also disrupt evening commutes.
Heat Safety And Cooling Sites
Miami-Dade County maintains a network of cooling sites, including libraries and community centers, that operate during heat season. Several locations are available daily for anyone who needs air conditioning. Residents are advised to call ahead for hours and capacity and to check the county list for the nearest facility and phone numbers. See Miami-Dade County for details.
Plan Ahead
Temperatures are expected to hold in the upper 80s to near 90°F through the week, and the humidity will keep heat-index values flirting with advisory levels on several afternoons. The daily sea breeze should continue to spark scattered showers and storms. If you need to be outside, try to schedule strenuous activity for the morning, take frequent water breaks, and keep a phone handy to track any rapidly issued radar-based warnings.
