Sweetwater Lake Weather Forecast

    • 81
    • 92

    Thunderstorms Likely

    • 83
    • 91

    Thunderstorms

    • 84
    • 92

    Chance Thunderstorms

    • 83
    • 92

    Chance Thunderstorms

    • 83
    • 92

    Chance Thunderstorms

    • 82
    • 92

    Chance Thunderstorms

Today 31 Aug Galveston Island

Partly sunny. A chance of Showers and Thunderstorms late this Morning, then a slight chance of Showers and Thunderstorms this afternoon. Highs in the lower 90s. Northeast Winds 5 to 10 Mph, becoming east this afternoon. Chance of rain 40 percent. Heat index Values up to 107.

Tonight 31 Aug Galveston Island

Mostly cloudy. A slight chance of Showers and Thunderstorms in the Evening, then Showers and Thunderstorms likely after midnight. Humid with Lows in the lower 80s. Southeast Winds 5 to 10 Mph, becoming northeast after midnight. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sweetwater Lake Temperature Statistics

August Temperature

Galveston, Scholes Field (1.2 miles)

  • Lowest 10 August, 2026

    78.7 °F

  • Average August

    87.6 °F

  • Highest 22 August, 2026

    95.6 °F

Climate (2021–2026)

Galveston, Scholes Field (1.2 miles)

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  • Average Low 2021–2026

    68.6 °F

  • Average 2021–2026

    73.9 °F

  • Average High 2021–2026

    79.6 °F
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