Sweetwater Lake Weather Forecast

    • 80
    • 90

    Mostly Sunny

    • 79
    • 89

    Slight Chance Thunderstorms

    • 80
    • 89

    Mostly Sunny

    • 79
    • 88

    Chance Thunderstorms

    • 79
    • 89

    Chance Thunderstorms

    • 79
    • 88

    Chance Thunderstorms

Today 16 Sep Galveston Island

Sunny. Highs in the upper 80s. East Winds 5 to 10 Mph.

Tonight 16 Sep Galveston Island

Clear. Lows around 80. Southeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sweetwater Lake Temperature Statistics

September Temperature

Galveston, Scholes Field (1.2 miles)

  • Lowest 10 September, 2025

    75.2 °F

  • Average September

    82.4 °F

  • Highest 2 September, 2025

    87.8 °F

Climate (2020–Present)

Galveston, Scholes Field (1.2 miles)

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  • Average Low 2020–2025

    68.3 °F

  • Average 2020–2025

    73.4 °F

  • Average High 2020–2025

    79.2 °F
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