Sweetwater Lake Weather Forecast

    • 83
    • 92

    Mostly Sunny

    • 83
    • 92

    Thunderstorms Likely

    • 83
    • 91

    Thunderstorms Likely

    • 82
    • 91

    Mostly Sunny

    • 82
    • 90

    Mostly Sunny

    • 82
    • 91

    Chance Thunderstorms

    • 81
    • 91

    Chance Thunderstorms

Today 15 Sep Galveston Island

Mostly sunny with a slight chance of Showers with isolated Thunderstorms. Near steady temperature in the lower 90s. Southeast Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 109.

Tonight 15 Sep Galveston Island

Mostly clear. Humid with Lows in the mid 80s. Southeast Winds 5 to 10 Mph. Heat index Values up to 107 early.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sweetwater Lake Temperature Statistics

September Temperature

Galveston, Scholes Field (1.2 miles)

  • Lowest 4 September, 2026

    75.7 °F

  • Average September

    85.3 °F

  • Highest 3 September, 2026

    93.7 °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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