Heat Advisory · until 8:00 PM EDT

Heat Advisory

Moderate · Inland Volusia; Northern Lake County; Orange; Seminole; Osceola; Okeechobee; Coastal Volusia; Southern Lake County; Coastal Indian River; Coastal St. Lucie; Coastal Martin; Inland Northern Brevard; Inland Indian River; Inland St. Lucie; Inland Martin; Mainland Northern Brevard; Northern Brevard Barrier Islands; Inland Southern Brevard; Mainland Southern Brevard; Southern Brevard Barrier Islands

Heat Advisory issued August 11 at 12:13AM EDT until August 11 at 8:00PM EDT by NWS Melbourne FL

Instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

View

Units

Port St. Lucie, Florida weather · now

90°

Partly Cloudy

Feels: 108°
High / Low: 94° / 75°
Wind: 37 mph E
Humidity: 75%

No precipitation expected in the next 1.7 hours.

Precipitation · next 12 hrs

Peak 21% · 4 PM

1 PM

4 PM

7 PM

10 PM

12 AM

GoodAir quality PollenTreeNoneGrassModerateWeedModerate

Sun 6:50 AM 8:02 PM 13h 12m

Moon Waning Crescent 3% lit

Current weather and 7-day forecast for Port St. Lucie, Florida, sourced directly from the National Weather Service. Expect slight chance showers and thunderstorms today. Today's high is 94° with a low near 75°. 1 active weather alert in effect.

What to wear today

Loose, light, and water nearby

94°F — wear breathable fabrics and stay hydrated.

Next 24 hours

1 PM

93°

4%
3 PM

92°

16%
5 PM

91°

19%
7 PM

88°

15%
9 PM

83°

6%
11 PM

81°

4%
1 AM

79°

5%
3 AM

77°

1%
5 AM

77°

3%
7 AM

75°

5%
9 AM

82°

2%
11 AM

89°

4%

Live radar

View full radar →

Open full radar →

7 days

Today 8/11 Slight Chance Showers And Thunderstorms 21% 94° · 75°
1. 1 PM 93° Sunny 4%
2. 2 PM 93° Mostly Sunny 12%
3. 3 PM 92° Slight Chance Showers And Thunderstorms 16%
4. 4 PM 93° Slight Chance Showers And Thunderstorms 21%
5. 5 PM 91° Slight Chance Showers And Thunderstorms 19%
6. 6 PM 90° Slight Chance Showers And Thunderstorms 17%
7. 7 PM 88° Slight Chance Showers And Thunderstorms 15%
8. 8 PM 85° Mostly Clear 7%
9. 9 PM 83° Mostly Clear 6%
10. 10 PM 82° Mostly Clear 3%
11. 11 PM 81° Mostly Clear 4%
Wed 8/12 Sunny then Chance Showers And Thunderstorms 34% 95° · 75°
1. 12 AM 79° Mostly Clear 3%
2. 1 AM 79° Mostly Clear 5%
3. 2 AM 78° Mostly Clear 2%
4. 3 AM 77° Mostly Clear 1%
5. 4 AM 77° Mostly Clear 2%
6. 5 AM 77° Mostly Clear 3%
7. 6 AM 77° Sunny 3%
8. 7 AM 75° Sunny 5%
9. 8 AM 78° Sunny 4%
10. 9 AM 82° Sunny 2%
11. 10 AM 87° Sunny 2%
12. 11 AM 89° Sunny 4%
13. 12 PM 92° Sunny 9%
14. 1 PM 93° Mostly Sunny 12%
15. 2 PM 93° Chance Showers And Thunderstorms 31%
16. 3 PM 93° Chance Showers And Thunderstorms 34%
17. 4 PM 93° Chance Showers And Thunderstorms 32%
18. 5 PM 90° Chance Showers And Thunderstorms 30%
19. 6 PM 89° Chance Showers And Thunderstorms 30%
20. 7 PM 88° Chance Showers And Thunderstorms 33%
21. 8 PM 84° Partly Cloudy 5%
22. 9 PM 82° Partly Cloudy 5%
23. 10 PM 81° Mostly Clear 5%
24. 11 PM 80° Mostly Clear 5%
Thu 8/13 Sunny then Chance Showers And Thunderstorms 40% 94° · 75°
1. 12 AM 79° Mostly Clear 5%
2. 1 AM 79° Mostly Clear 5%
3. 2 AM 78° Mostly Clear 2%
4. 3 AM 78° Mostly Clear 2%
5. 4 AM 77° Mostly Clear 2%
6. 5 AM 77° Mostly Clear 2%
7. 6 AM 77° Sunny 2%
8. 7 AM 78° Sunny 2%
9. 8 AM 78° Sunny 8%
10. 9 AM 82° Sunny 8%
11. 10 AM 85° Sunny 8%
12. 11 AM 89° Sunny 8%
13. 12 PM 90° Sunny 8%
14. 1 PM 91° Sunny 8%
15. 2 PM 92° Chance Showers And Thunderstorms 40%
16. 3 PM 91° Chance Showers And Thunderstorms 40%
17. 4 PM 91° Chance Showers And Thunderstorms 40%
18. 5 PM 90° Chance Showers And Thunderstorms 40%
19. 6 PM 88° Chance Showers And Thunderstorms 40%
20. 7 PM 86° Chance Showers And Thunderstorms 40%
21. 8 PM 84° Partly Cloudy 3%
22. 9 PM 82° Partly Cloudy 3%
23. 10 PM 81° Mostly Clear 3%
24. 11 PM 80° Mostly Clear 3%
Fri 8/14 Sunny then Chance Showers And Thunderstorms 28% 93° · 76°
1. 12 AM 79° Mostly Clear 3%
2. 1 AM 78° Mostly Clear 3%
3. 2 AM 77° Mostly Clear 1%
4. 3 AM 77° Mostly Clear 1%
5. 4 AM 76° Mostly Clear 1%
6. 5 AM 76° Mostly Clear 1%
7. 6 AM 76° Sunny 1%
8. 7 AM 77° Sunny 1%
9. 8 AM 78° Sunny 4%
10. 9 AM 82° Sunny 4%
11. 10 AM 86° Sunny 4%
12. 11 AM 90° Sunny 4%
13. 12 PM 92° Sunny 4%
14. 1 PM 92° Mostly Sunny 4%
15. 2 PM 92° Chance Showers And Thunderstorms 28%
16. 3 PM 92° Chance Showers And Thunderstorms 28%
17. 4 PM 91° Chance Showers And Thunderstorms 28%
18. 5 PM 90° Chance Showers And Thunderstorms 28%
19. 6 PM 88° Chance Showers And Thunderstorms 28%
20. 7 PM 85° Chance Showers And Thunderstorms 28%
21. 8 PM 85° Mostly Clear 2%
22. 9 PM 84° Mostly Clear 2%
23. 10 PM 82° Mostly Clear 2%
24. 11 PM 81° Mostly Clear 2%
Sat 8/15 Chance Showers And Thunderstorms 30% 93° · 75°
1. 12 AM 80° Mostly Clear 2%
2. 1 AM 79° Mostly Clear 2%
3. 2 AM 78° Clear 3%
4. 3 AM 77° Clear 3%
5. 4 AM 77° Clear 3%
6. 5 AM 77° Clear 3%
7. 6 AM 77° Sunny 3%
8. 7 AM 78° Sunny 3%
9. 8 AM 79° Slight Chance Showers And Thunderstorms 20%
10. 9 AM 82° Slight Chance Showers And Thunderstorms 20%
11. 10 AM 86° Slight Chance Showers And Thunderstorms 20%
12. 11 AM 89° Slight Chance Showers And Thunderstorms 20%
13. 12 PM 90° Slight Chance Showers And Thunderstorms 20%
14. 1 PM 91° Slight Chance Showers And Thunderstorms 20%
15. 2 PM 91° Chance Showers And Thunderstorms 30%
16. 3 PM 91° Chance Showers And Thunderstorms 30%
17. 4 PM 92° Chance Showers And Thunderstorms 30%
18. 5 PM 91° Chance Showers And Thunderstorms 30%
19. 6 PM 90° Chance Showers And Thunderstorms 30%
20. 7 PM 88° Chance Showers And Thunderstorms 30%
21. 8 PM 86° Mostly Clear 1%
22. 9 PM 84° Mostly Clear 1%
23. 10 PM 82° Mostly Clear 1%
24. 11 PM 80° Mostly Clear 1%
Sun 8/16 Sunny 7% 94° · 75°
1. 12 AM 79° Mostly Clear 1%
2. 1 AM 78° Mostly Clear 1%
3. 2 AM 78° Clear
4. 3 AM 77° Clear
5. 4 AM 77° Clear
6. 5 AM 77° Clear
7. 6 AM 77° Sunny
8. 7 AM 77° Sunny
9. 8 AM 78° Sunny 1%
10. 9 AM 81° Sunny 1%
11. 10 AM 85° Sunny 1%
12. 11 AM 89° Sunny 1%
13. 12 PM 91° Sunny 1%
14. 1 PM 92° Sunny 1%
15. 2 PM 93° Mostly Sunny 7%
16. 3 PM 94° Mostly Sunny 7%
17. 4 PM 94° Mostly Sunny 7%
18. 5 PM 93° Mostly Sunny 7%
19. 6 PM 91° Partly Cloudy 7%
20. 7 PM 89° Partly Cloudy 7%
21. 8 PM 86° Mostly Clear 2%
22. 9 PM 84° Mostly Clear 2%
23. 10 PM 82° Mostly Clear 2%
24. 11 PM 80° Mostly Clear 2%
Mon 8/17 Sunny then Slight Chance Showers And Thunderstorms 20% 94° · 76°
1. 12 AM 79° Mostly Clear 2%
2. 1 AM 78° Mostly Clear 2%
3. 2 AM 78° Mostly Clear 2%
4. 3 AM 77° Mostly Clear 2%
5. 4 AM 77° Mostly Clear 2%
6. 5 AM 77° Mostly Clear 2%
7. 6 AM 77° Sunny 2%
8. 7 AM 77° Sunny 2%
9. 8 AM 78° Sunny 5%
10. 9 AM 81° Sunny 5%
11. 10 AM 85° Sunny 5%
12. 11 AM 89° Sunny 5%
13. 12 PM 91° Sunny 5%
14. 1 PM 92° Sunny 5%
15. 2 PM 92° Slight Chance Showers And Thunderstorms 20%
16. 3 PM 93° Slight Chance Showers And Thunderstorms 20%
17. 4 PM 93° Slight Chance Showers And Thunderstorms 20%
18. 5 PM 93° Slight Chance Showers And Thunderstorms 20%
19. 6 PM 91° Slight Chance Showers And Thunderstorms 20%
20. 7 PM 89° Slight Chance Showers And Thunderstorms 20%
21. 8 PM 86° Partly Cloudy 6%
22. 9 PM 84° Partly Cloudy 6%
23. 10 PM 82° Partly Cloudy 6%
24. 11 PM 80° Partly Cloudy 6%

Extended outlook days 8–16

Tue 8/18 Drizzle 22% 91° · 76°
Wed 8/19 Rain Showers 28% 95° · 73°
Thu 8/20 Thunderstorms 40% 92° · 75°
Fri 8/21 Drizzle 36% 92° · 76°
Sat 8/22 Cloudy 43% 91° · 79°
Sun 8/23 Drizzle 47% 92° · 77°
Mon 8/24 Cloudy 55% 93° · 76°
Tue 8/25 Thunderstorms 58% 92° · 75°
Wed 8/26 Rain Showers 56% 91° · 77°

Days 8+ from the Open-Meteo multi-model ensemble — treat as a guide; accuracy drops past day 7.

Best day this week

Mild temps, low rain chance, clearer skies.

Sunday, 8/16

Sunny, 94° / 75°

Tomorrow95°75°
Thu94°75°
Fri93°76°
Sat93°75°
Sun94°75°
Mon94°76°

Best time to head outside

Picks the upcoming daytime hour with the most favorable conditions for each activity. Factors in temperature, wind, precipitation timing, and pollen.

RunTomorrow 7 AM
warm at 75°F · calm wind · no rain expected · pollen moderate today
Good80 / 100
BikeTomorrow 6 AM
comfortable at 77°F · calm wind · no rain expected · pollen moderate today
Excellent100 / 100
GolfTomorrow 6 AM
comfortable at 77°F · calm wind · no rain expected · pollen moderate today
Excellent100 / 100
PicnicTomorrow 6 AM
comfortable at 77°F · calm wind · no rain expected · pollen moderate today
Excellent100 / 100
Magic ShowAnytime
Any weather is magic show weather. Indoors or out, magic doesn't care.
Corporate Magician Scott Henderson

Climate normals

What weather to expect in Port St. Lucie

Port St. Lucie in August typically averages 90° highs and 76° lows, with about 29 days of rain. The hottest stretch is July (average high 92°); the coldest is January (average low 54°).

Month	Avg high	Avg low	Rainy days
Jan	72°	54°	11
Feb	77°	57°	10
Mar	80°	62°	16
Apr	82°	68°	13
May	89°	73°	25
Jun	90°	75°	27
Jul	92°	75°	25
Aug	90°	76°	29
Sep	87°	74°	29
Oct	82°	72°	23
Nov	80°	63°	11
Dec	77°	61°	12

Normals derived from the past two years of observations via Open-Meteo's historical archive.

More for Port St. Lucie

Other cities in Florida

Detailed forecast (NWS)

This Afternoon: A slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 94. Heat index values as high as 107. East wind around 5 mph. Chance of precipitation is 20%.
Wednesday: A chance of showers and thunderstorms after 2pm. Sunny. High near 95, with temperatures falling to around 90 in the afternoon. Heat index values as high as 106. West wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Thursday: A chance of showers and thunderstorms after 2pm. Sunny, with a high near 94. Southeast wind 0 to 5 mph. Chance of precipitation is 40%.
Friday: A chance of showers and thunderstorms after 2pm. Sunny, with a high near 93. South southeast wind 0 to 10 mph. Chance of precipitation is 30%.

Forecast details

NWS gridpoint: MLB 71,18
Radar station: KMLB
Time zone: America/New_York
Coordinates: 27.294, -80.350