Port St Lucie Weather Forecast
- 75
- 94
Chance Thunderstorms
- 75
- 94
Chance Thunderstorms
- 75
- 94
Chance Thunderstorms
- 75
- 93
Thunderstorms Likely
- 75
- 93
Thunderstorms Likely
- 76
- 93
Thunderstorms Likely
Today 23 Aug Coastal St. Lucie
Mostly sunny late in the Morning, then partly cloudy with a chance of Showers and Thunderstorms late in the afternoon and towards Sunset. Highs in the lower 90s. Southwest Winds 5 to 10 Mph becoming southeast 10 to 15 Mph late in the afternoon and towards Sunset. Chance of rain 40 percent. Heat index Values up to 104.
Tonight 23 Aug Coastal St. Lucie
Partly cloudy. A slight chance of Showers and Thunderstorms in the late evening and early morning. Lows in the upper 70s. South Winds 5 to 10 Mph. Chance of rain 20 percent.
Port St Lucie Temperature Statistics
August Temperature
Witham Field Airport (9.9 miles)
Lowest 5 August, 2026
75.2 °FAverage August
82.6 °FHighest 17 August, 2026
96.8 °F
Climate (2021–2026)
Witham Field Airport (9.9 miles)
Average Low 2021–2026
69.4 °FAverage 2021–2026
74.6 °FAverage High 2021–2026
83.1 °F