South Bay Weather Forecast

    • 64
    • 69

    Chance Thunderstorms

    • 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 17 Dec Aransas Islands

A chance of Thunderstorms. Showers. Patchy fog. Locally heavy rainfall possible late this morning. Near steady temperature in the upper 60s. East Winds 5 to 10 Mph. Chance of rain 90 percent.

Tonight 17 Dec Aransas Islands

Mostly cloudy. Patchy fog. Near steady temperature in the mid 60s. Southeast Winds around 5 Mph.

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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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