Port St Lucie Weather Forecast

    • 72
    • 85

    Thunderstorms Likely

    • 74
    • 86

    Thunderstorms Likely

    • 74
    • 86

    Thunderstorms Likely

    • 74
    • 87

    Thunderstorms Likely

    • 74
    • 88

    Thunderstorms Likely

    • 74
    • 90

    Chance Thunderstorms

    • 74
    • 90

    Chance Thunderstorms

Today 17 Sep Coastal St. Lucie

Cloudy early in the afternoon then becoming mostly cloudy. Showers and Thunderstorms likely. Highs in the mid 80s. East Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 17 Sep Coastal St. Lucie

Mostly cloudy with Showers and Thunderstorms likely early in the Evening, then considerable cloudiness with a chance of Showers and Thunderstorms in the late evening and overnight. Lows in the mid 70s. East Winds 5 to 10 Mph. Chance of rain 60 percent.

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Port St Lucie Temperature Statistics

September Temperature

Witham Field Airport (9.9 miles)

  • Lowest 14 September, 2025

    73.4 °F

  • Average September

    80 °F

  • Highest 7 September, 2025

    91.4 °F

Climate (2020–Present)

Witham Field Airport (9.9 miles)

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  • Average Low 2020–2025

    69.4 °F

  • Average 2020–2025

    74.6 °F

  • Average High 2020–2025

    83 °F
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