San Antonio Bay Weather Forecast

    • 79
    • 88

    Rain Showers Likely

    • 77
    • 86

    Rain Showers

    • 78
    • 86

    Chance Thunderstorms

    • 79
    • 86

    Slight Chance Rain Showers

    • 79
    • 86

    Chance Rain Showers

    • 80
    • 87

    Chance Rain Showers

    • 80
    • 87

    Chance Rain Showers

Today 6 Sep Calhoun Islands

Partly cloudy with a chance of Showers and Thunderstorms. Highs in the upper 80s. South Winds 10 to 15 Mph, becoming southeast 5 to 10 Mph this afternoon. Chance of rain 50 percent.

Tonight 6 Sep Calhoun Islands

Partly cloudy with a chance of Thunderstorms. A chance of Showers this Evening, then Showers likely after midnight. Lows in the upper 70s. East Winds 5 to 10 Mph. Chance of rain 70 percent.

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San Antonio Bay Temperature Statistics

September Temperature

Rockport Aransas County Airport (21.7 miles)

  • Lowest 4 September, 2025

    75.9 °F

  • Average September

    84.2 °F

  • Highest 3 September, 2025

    93.9 °F

Climate (2020–Present)

Rockport Aransas County Airport (21.7 miles)

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  • Average Low 2020–2025

    67 °F

  • Average 2020–2025

    74 °F

  • Average High 2020–2025

    81.5 °F
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