Sweetwater Lake Weather Forecast

    • 82
    • 93

    Slight Chance Thunderstorms

    • 82
    • 92

    Slight Chance Rain Showers

    • 81
    • 92

    Mostly Sunny

    • 81
    • 90

    Partly Sunny

    • 82
    • 90

    Partly Sunny

    • 82
    • 90

    Slight Chance Thunderstorms

Today 22 Sep Galveston Island

Sunny with a slight chance of Showers and Thunderstorms. Humid with Highs in the lower 90s. North Winds 5 to 10 Mph, becoming northeast in the afternoon. Chance of rain 20 percent.

Tonight 22 Sep Galveston Island

Mostly clear in the Evening, then becoming partly cloudy. Humid with Lows in the lower 80s. Southeast Winds 5 to 10 Mph, becoming east after midnight.

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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

    85.6 °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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