Port Lavaca Weather Forecast

    • 82
    • 90

    Decreasing Clouds

    • 82
    • 90

    Mostly Sunny

    • 81
    • 92

    Mostly Sunny

    • 81
    • 92

    Mostly Sunny

    • 81
    • 92

    Mostly Sunny

    • 82
    • 91

    Mostly Sunny

Today 19 Aug Coastal Calhoun

Partly cloudy. Highs in the lower 90s. South Winds 5 to 10 Mph, increasing to 10 to 15 Mph this afternoon.

Tonight 19 Aug Coastal Calhoun

Partly cloudy. Lows in the lower 80s. South Winds 10 to 15 Mph.

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Port Lavaca Temperature Statistics

August Temperature

Palacios Municipal Airport (23 miles)

  • Lowest 17 August, 2026

    72 °F

  • Average August

    87.3 °F

  • Highest 2 August, 2026

    98.7 °F

Climate (2021–2026)

Palacios Municipal Airport (23 miles)

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  • Average Low 2021–2026

    65.6 °F

  • Average 2021–2026

    73.3 °F

  • Average High 2021–2026

    81.1 °F
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