| NWS Forecast for: Galveston Island Issued by: National Weather Service Houston, TX Last Update: 122 AM CDT Sat Sep 12 2026 |  |
| Rest Of Tonight: Partly cloudy with a slight chance of showers and thunderstorms. Near steady temperature in the mid 80s. South winds 15 to 20 mph. Chance of rain 20 percent. Saturday: Mostly sunny with a slight chance of showers and thunderstorms. Humid with highs in the lower 90s. South winds around 15 mph. Chance of rain 20 percent. Heat index values up to 109. Saturday Night: Partly cloudy. Humid with lows in the mid 80s. South winds 10 to 15 mph. Heat index values up to 105 early. Sunday: Mostly sunny. Humid with highs around 90. South winds 10 to 15 mph. Heat index values up to 108. Sunday Night: Partly cloudy. Humid with lows in the lower 80s. South winds 10 to 15 mph. Heat index values up to 105 early. Monday: Mostly sunny. Highs around 90. Heat index values up to 110. Monday Night: Mostly clear. Near steady temperature in the mid 80s. Tuesday: Sunny. Highs around 90. Heat index values up to 105. Tuesday Night: Mostly clear. Near steady temperature in the mid 80s. Wednesday: Mostly sunny. Highs around 90. Heat index values up to 105. Wednesday Night: Partly cloudy. A chance of showers and thunderstorms after midnight. Near steady temperature in the mid 80s. Chance of rain 30 percent. Thursday: Mostly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 50 percent. Heat index values up to 105. Thursday Night: Partly cloudy. Lows in the lower 80s. Friday: Sunny. Highs in the upper 80s. | |
| Zone Forecast: Galveston Island | |
Visit your local NWS office at: https://www.weather.gov/hgx |