South Bay Weather Forecast

    • 58
    • 71

    Decreasing Clouds

    • 62
    • 66

    Mostly Sunny

    • 67
    • 72

    Mostly Sunny

    • 68
    • 73

    Partly Sunny

    • 67
    • 73

    Partly Sunny

    • 67
    • 73

    Partly Sunny

Today 18 Dec Aransas Islands

Mostly cloudy in the Morning, then becoming partly cloudy. Patchy fog in the morning. Highs in the lower 70s. Light and variable Winds, becoming east around 5 Mph in the afternoon.

Tonight 18 Dec Aransas Islands

Mostly clear. Lows in the mid 50s. Northeast Winds 5 to 10 Mph, increasing to 10 to 15 Mph after midnight.

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South Bay Temperature Statistics

December Temperature

Port Aransas, Mustang Beach Airport (5.6 miles)

  • Lowest 15 December, 2025

    41.4 °F

  • Average December

    59 °F

  • Highest 13 December, 2025

    75.7 °F

Climate (2020–Present)

Port Aransas, Mustang Beach Airport (5.6 miles)

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  • Average Low 2020–2025

    69.1 °F

  • Average 2020–2025

    73.6 °F

  • Average High 2020–2025

    78.4 °F
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