Port St. Lucie, FL Weather Tomorrow

Explore tomorrow's Port St. Lucie weather before planning your week with a detailed 5 day forecast featuring daily precipitation forecasts, changing sky conditions, daytime highs, overnight lows, Fahrenheit and Celsius temperatures, sunrise, sunset, wind chill, and local wind details for the Port St. Lucie area.
Updated: Sun Sep 13th 2026 10:30 AM EDT
Port St. Lucie, FL Weather – 9-13 – Overcast
87° / 77°
Overcast
In Port St. Lucie, it will be overcast with highs near 87°F and lows around 77°F. The chance of rain is 76% with an estimated 0.28in. Wind will be moderate, blowing around 11mph on average and gusts of 20.4mph at 3 PM. The humidity will be on the higher side, averaging about 73%, the maximum being 77% at 8 PM and 60% being its lowest at 2 PM. Barometric pressure is its highest of 30.08inHg at 11 AM, a lowest point of 29.99inHg at 5 PM with an avg 30.03inHg.
Port St. Lucie, FL Weather – 9-14 – Overcast
89° / 78°

Weather Tomorrow

Overcast
Port St. Lucie is set for overcast with temperatures peaking at 89°F and dipping to 78°F. The chance of rain is 80% with an estimated 0.43in. Winds will be light at 9mph and gusts of 15.2mph at 3 PM. The humidity will be on the higher side, averaging about 76%, the maximum being 84% at 6 AM and 62% being its lowest at 12 PM. Barometric pressure is its highest of 30.06inHg at 11 AM, a lowest point of 29.99inHg at 5 PM with an avg 30.02inHg.
Port St. Lucie, FL Weather – 9-15 – Scattered Showers
85° / 79°
Scattered Showers
In Port St. Lucie, showers likely at times with highs near 85°F and lows around 79°F. The chance of rain is 76% with an estimated 0.24in. Wind will be moderate, blowing around 15mph on average and gusts of 19.5mph at 10 PM. The humidity will be on the higher side, averaging about 76%, the maximum being 84% at 6 AM and 65% being its lowest at 12 PM. Barometric pressure is its highest of 30.11inHg at 12 PM, a lowest point of 30.01inHg at 4 AM with an avg 30.06inHg.
Port St. Lucie, FL Weather – 9-16 – Light Rain Shower
83° / 80°
Light Rain Shower
In Port St. Lucie, it will rain at times with highs near 83°F and lows around 80°F. The chance of rain is 83% with an estimated 0.63in. Wind will be moderate, blowing around 20mph on average and gusts of 24.7mph at 10 PM. The humidity will be on the higher side, averaging about 77%, the maximum being 80% at 6 AM and 72% being its lowest at 2 PM. Barometric pressure is its highest of 30.13inHg at 12 PM, a lowest point of 30.06inHg at 4 AM with an avg 30.09inHg.
Port St. Lucie, FL Weather – 9-17 – Light Rain Shower
83° / 79°
Light Rain Shower
In Port St. Lucie, periods of rain are likely with highs near 83°F and lows around 79°F. The chance of rain is 82% with an estimated 0.42in. Wind will be moderate, blowing around 18mph on average and gusts of 22.6mph at 12 AM. The humidity will be on the higher side, averaging about 77%, the maximum being 81% at 1 AM and 72% being its lowest at 3 PM. Barometric pressure is its highest of 30.1inHg at 12 AM, a lowest point of 30.02inHg at 6 PM with an avg 30.05inHg.
Port St. Lucie, FL Weather – 9-18 – Sunny
84° / 78°
Sunny
Daytime highs will reach 84°F with lows dropping to 78°F in Port St. Lucie, where bright and sunny conditions. Rainfall predicted to have a 69% chance with an estimated 0.29in. Winds will be light at 9mph and gusts of 19.5mph at 2 PM. The humidity will be on the higher side, averaging about 73%, the maximum being 79% at 11 PM and 66% being its lowest at 11 AM. Barometric pressure is its highest of 30.03inHg at 12 AM, a lowest point of 29.95inHg at 5 PM with an avg 29.99inHg.

Currently

Partly Cloudy 83°F
30.07 inHg.
Barometer
68%
Humidity
WNW 3.6 mph
Wind
Partly Cloudy

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