Sweetwater Lake Weather Forecast

    • 78
    • 84

    Chance Thunderstorms

    • 78
    • 85

    Thunderstorms Likely

    • 79
    • 87

    Thunderstorms Likely

    • 78
    • 86

    Rain Showers

    • 77
    • 86

    Rain Showers Likely

    • 78
    • 86

    Chance Thunderstorms

Today 20 May Galveston Island

Mostly cloudy. Showers likely with a chance of Thunderstorms in the Morning, then a slight chance of Showers and Thunderstorms in the afternoon. Breezy with Highs in the mid 80s. East Winds 20 to 25 Mph, Diminishing to around 10 Mph in the afternoon. Chance of rain 70 percent.

Tonight 20 May Galveston Island

Showers and Thunderstorms. Some Thunderstorms may produce gusty Winds. Near steady temperature in the lower 70s. East Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sweetwater Lake Temperature Statistics

May Temperature

Galveston, Scholes Field (1.2 miles)

  • Lowest 2 May, 2026

    56.6 °F

  • Average May

    76 °F

  • Highest 9 May, 2026

    87.7 °F

Climate (2021–Present)

Galveston, Scholes Field (1.2 miles)

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  • Average Low 2021–2026

    68.6 °F

  • Average 2021–2026

    73.8 °F

  • Average High 2021–2026

    79.6 °F
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