Measurements:
°C
°F
CURRENT WEATHER
11:15
Port St. Lucie
90°F
W 6 mph
Feels like: 98°F
Precip: 57%
World Resorts USA Port St. Lucie Weather

7 Day Weather Forecast

09.15
tue
DAY
90°F
W 6 mph
precip
57%
NIGHT
86°F
W 12 mph
precip
19%
09.16
wed
DAY
88°F
SW 16 mph
precip
62%
NIGHT
84°F
W 17 mph
precip
51%
09.17
thu
DAY
88°F
SW 16 mph
precip
46%
NIGHT
84°F
W 12 mph
precip
51%
09.18
fri
DAY
88°F
W 12 mph
precip
43%
NIGHT
84°F
W 6 mph
precip
39%
09.19
sat
DAY
90°F
W 9 mph
precip
36%
NIGHT
86°F
W 12 mph
precip
26%
09.20
sun
DAY
88°F
W 7 mph
precip
23%
NIGHT
84°F
NW 7 mph
precip
7%
09.21
mon
DAY
90°F
NE 3 mph
precip
26%
NIGHT
84°F
NW 8 mph
precip
64%

Port St. Lucie Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Port St. Lucie was 29.4°F. The maximum and minimum values were 29.0°F and 29.7°F respectively.

Port St. Lucie on the Weather Map

Best Time to Visit Port St. Lucie
The most sunny months:
March 15 days
December 14 days
May 13 days
The most warm months:
July 92.7 °F
August 92.5 °F
June 89.9 °F
Warmest sea temperature:
August 88.8 °F
September 88.3 °F
July 87.8 °F
The most cold months:
January 72.6 °F
December 75.9 °F
February 76.8 °F
The most rainy months:
September 4 days
May 3 days
August 3 days
The most windy months:
November 11 mph
April 11 mph
March 11 mph
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