Port St Lucie - River Park Weather Forecast

    • 75
    • 85

    Chance Thunderstorms

    • 75
    • 87

    Slight Chance Thunderstorms

    • 74
    • 87

    Partly Sunny

    • 74
    • 88

    Chance Thunderstorms

    • 75
    • 88

    Chance Thunderstorms

    • 75
    • 89

    Chance Thunderstorms

    • 76
    • 89

    Chance Thunderstorms

Today 18 May Coastal St. Lucie

Partly sunny with a chance of Showers. A slight chance of Thunderstorms late in the Morning, then a chance of Thunderstorms late in the afternoon and towards Sunset. Breezy. Highs in the mid 80s. East Winds 15 to 20 Mph. Chance of rain 30 percent.

Tonight 18 May Coastal St. Lucie

A slight chance of Thunderstorms through early morning. Partly cloudy with a slight chance of Showers. Breezy. Lows in the upper 70s. East Winds 15 to 20 Mph decreasing to 10 to 15 Mph in the late evening and overnight. Chance of rain 20 percent.

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Port St Lucie - River Park Temperature Statistics

May Temperature

Witham Field Airport (11.8 miles)

  • Lowest 7 May, 2026

    68 °F

  • Average May

    78.5 °F

  • Highest 2 May, 2026

    95 °F

Climate (2021–Present)

Witham Field Airport (11.8 miles)

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  • Average Low 2021–2026

    69.3 °F

  • Average 2021–2026

    74.5 °F

  • Average High 2021–2026

    82.9 °F
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