Galveston - Pier 21 Weather Forecast

    • 84
    • 89

    Slight Chance Thunderstorms

    • 84
    • 89

    Slight Chance Thunderstorms

    • 85
    • 91

    Chance Thunderstorms

    • 82
    • 92

    Mostly Sunny

    • 82
    • 92

    Mostly Sunny

    • 81
    • 91

    Mostly Sunny

Today 20 Sep Galveston Island

Sunny with a slight chance of Showers and Thunderstorms. Humid with Highs around 90. East Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 20 Sep Galveston Island

Partly cloudy. Humid. Near steady temperature in the mid 80s. Southeast Winds 5 to 10 Mph.

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Galveston - Pier 21 Temperature Statistics

September Temperature

Galveston, Scholes Field (4.3 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 (4.3 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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