Port St. Lucie 7-day weather forecast

Written by:
September 8, 2025
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Port St. Lucie 7-day weather forecast

Stacker created the forecast for Port St. Lucie, Florida using data from OpenWeather. This week's high is 88 °F on Sunday, while the low is 73 °F on Thursday. There are expected to be 3 sunny days and rain on 7 days this week.

There are currently no weather alerts.

Monday, September 15

- High of 87 °F, low of 75 °F (57% humidity)
- Sunny with a 92% chance of rain (2 mm of rain)
- Very high risk of harm from sun exposure (10 UV index)
- Gentle breeze (11 mph wind)
- Sunrise at 7:07 AM, sunset at 7:26 PM
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Tuesday, September 16

- High of 85 °F, low of 77 °F (61% humidity)
- Sunny with a 100% chance of rain (1 mm of rain)
- Very high risk of harm from sun exposure (10 UV index)
- Moderate breeze (14 mph wind)
- Sunrise at 7:07 AM, sunset at 7:25 PM
2 / 6
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Wednesday, September 17

- High of 83 °F, low of 75 °F (78% humidity)
- Overcast with a 100% chance of rain (9 mm of rain)
- Very high risk of harm from sun exposure (7 UV index)
- Gentle breeze (11 mph wind)
- Sunrise at 7:07 AM, sunset at 7:24 PM
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Thursday, September 18

- High of 78 °F, low of 73 °F (98% humidity)
- Overcast with a 100% chance of rain (101 mm of rain)
- Fresh breeze (19 mph wind)
- Sunrise at 7:08 AM, sunset at 7:22 PM
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Friday, September 19

- High of 84 °F, low of 75 °F (69% humidity)
- Overcast with a 100% chance of rain (24 mm of rain)
- Gentle breeze (9 mph wind)
- Sunrise at 7:08 AM, sunset at 7:21 PM
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Saturday, September 20

- High of 84 °F, low of 76 °F (71% humidity)
- Overcast with a 100% chance of rain (7 mm of rain)
- Gentle breeze (11 mph wind)
- Sunrise at 7:09 AM, sunset at 7:20 PM
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Dmitry Naumov // Shutterstock

Sunday, September 21

- High of 88 °F, low of 76 °F (60% humidity)
- Mostly sunny with a 100% chance of rain (6 mm of rain)
- Light breeze (5 mph wind)
- Sunrise at 7:09 AM, sunset at 7:19 PM
- New moon

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