Houston woke up to a steamy start on Saturday, July 18, 2026, with clear skies, temperatures already in the low 80s (about 81°F), and dew points in the upper 70s. In other words, it is every bit as muggy as it feels, and the heat is only set to climb through the afternoon as that humidity hangs around.
Highs are expected to top out near 95°F today, Saturday, July 18, 2026, with heat index readings pushing up to about 104°F and light south winds around 5 to 10 mph. Forecasters at the National Weather Service Houston/Galveston say rain chances will stay under 10% through midweek, and no watches or warnings are currently in effect for much of the metro area.
Hotter By Sunday and Into Next Week
Sunday, July 19, 2026, looks even hotter, with highs near 98°F and heat indices again reaching the low triple digits. By Monday, inland spots could see highs near 101°F. Overnight lows will linger in the upper 70s, which means limited relief from the heat even after sunset.
Find Relief and Avoid Heat Risks
To cope with the heat, it is smart to schedule outdoor chores for the early morning or late evening, drink plenty of water, and check on older neighbors and pets during the hottest part of the day. The city and its partners have opened "Beat the Heat" cooling centers across Houston. For a local list and guidance, residents can call 3-1-1 or check coverage from Click2Houston.
Marine Outlook
Out on the water, boaters can expect light southerly winds and seas of about 2 to 3 feet through midweek, with conditions easing as high pressure builds. Anyone heading offshore should keep an eye on updated marine forecasts from the National Weather Service Houston/Galveston for the latest details in the Gulf.
