Swan Lake Weather Forecast

    • 79
    • 92

    Mostly Sunny

    • 79
    • 91

    Rain Showers Likely

    • 78
    • 91

    Rain Showers Likely

    • 76
    • 90

    Rain Showers Likely

    • 76
    • 87

    Rain Showers Likely

    • 76
    • 88

    Chance Thunderstorms

Today 4 Sep Calhoun Islands

Sunny. Highs around 90. Southwest Winds 5 to 10 Mph, increasing to south 10 to 15 Mph this afternoon.

Tonight 4 Sep Calhoun Islands

Mostly clear. Lows in the lower 80s. South Winds 10 to 15 Mph.

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Swan Lake Temperature Statistics

September Temperature

Rockport Aransas County Airport (23.6 miles)

  • Lowest 1 September, 2025

    78.1 °F

  • Average September

    83.2 °F

  • Highest 2 September, 2025

    91.9 °F

Climate (2020–Present)

Rockport Aransas County Airport (23.6 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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