South Bay Weather Forecast

    • 61
    • 65

    Mostly Cloudy

    • 68
    • 73

    Chance Thunderstorms

    • 69
    • 75

    Chance Rain Showers

    • 68
    • 78

    Slight Chance Thunderstorms

    • 69
    • 75

    Partly Sunny

    • 70
    • 77

    Partly Sunny

Today 15 Dec Coastal Cameron

Mostly cloudy. Cooler with Highs in the mid 60s. North Winds 10 to 15 Mph with Gusts up to 20 Mph.

Tonight 15 Dec Coastal Cameron

Mostly cloudy. Lows in the mid 50s. Northeast Winds 5 to 10 Mph.

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South Bay Temperature Statistics

December Temperature

Port Isabel, Port Isabel-Cameron County Airport (13 miles)

  • Lowest 9 December, 2025

    48 °F

  • Average December

    63 °F

  • Highest 10 December, 2025

    82.9 °F

Climate (2020–Present)

Port Isabel, Port Isabel-Cameron County Airport (13 miles)

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  • Average Low 2020–2025

    68.5 °F

  • Average 2020–2025

    75.8 °F

  • Average High 2020–2025

    83.5 °F
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