Port St Lucie Weather Forecast

    • 73
    • 93

    Thunderstorms Likely

    • 74
    • 93

    Thunderstorms Likely

    • 74
    • 92

    Thunderstorms Likely

    • 74
    • 91

    Thunderstorms Likely

    • 74
    • 92

    Thunderstorms Likely

    • 74
    • 90

    Thunderstorms Likely

Today 25 Aug Coastal St. Lucie

Partly sunny with a chance of Showers and Thunderstorms early in the Afternoon, then considerable cloudiness with Showers and Thunderstorms likely late in the afternoon and towards Sunset. Highs in the lower 90s. West Winds 5 to 10 Mph. Chance of rain 70 percent. Heat index Values up to 103.

Tonight 25 Aug Coastal St. Lucie

Considerable cloudiness early in the evening then becoming partly cloudy. Showers and Thunderstorms likely early in the Evening, then a slight chance of Showers in the late evening and early morning. Lows in the mid 70s. West Winds around 5 Mph. Chance of rain 70 percent.

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Port St Lucie Temperature Statistics

August Temperature

Witham Field Airport (9.9 miles)

  • Lowest 11 August, 2025

    73.4 °F

  • Average August

    82.6 °F

  • Highest 21 August, 2025

    95 °F

Climate (2020–Present)

Witham Field Airport (9.9 miles)

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  • Average Low 2020–2025

    69.5 °F

  • Average 2020–2025

    74.6 °F

  • Average High 2020–2025

    82.9 °F
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