Hourly Weather Forecast for Port St. Lucie, Florida

Hourly Weather | Today › Wednesday, March 18, 2026

Active Weather Warnings

Rip Current Statement

Port St. Lucie, Florida

9 AM

55°

Feels Like 52°

Humidity: 88%

UV Index: 1

Wind: 14 mph

10 AM

61°

Feels Like 55°

Humidity: 83%

UV Index: 1

Wind: 14 mph

11 AM

63°

Feels Like 55°

Humidity: 80%

UV Index: 1

Wind: 15 mph

12 PM

64°

Feels Like 61°

Humidity: 76%

UV Index: 2

Wind: 15 mph

1 PM

64°

Feels Like 61°

Humidity: 74%

UV Index: 2

Wind: 16 mph

2 PM

66°

Feels Like 64°

Humidity: 72%

UV Index: 2

Wind: 15 mph

3 PM

68°

Feels Like 63°

Humidity: 70%

UV Index: 1

Wind: 15 mph

4 PM

70°

Feels Like 66°

Humidity: 66%

UV Index: 1

Wind: 16 mph

5 PM

68°

Feels Like 64°

Humidity: 69%

UV Index: 1

Wind: 16 mph

6 PM

66°

Feels Like 64°

Humidity: 70%

UV Index: 0

Wind: 15 mph

7 PM

66°

Feels Like 61°

Humidity: 71%

UV Index: 0

Wind: 14 mph

8 PM

66°

Feels Like 63°

Humidity: 75%

UV Index: 0

Wind: 12 mph

9 PM

64°

Feels Like 61°

Humidity: 77%

UV Index: 0

Wind: 10 mph

10 PM

63°

Feels Like 61°

Humidity: 79%

UV Index: 0

Wind: 10 mph

11 PM

63°

Feels Like 61°

Humidity: 79%

UV Index: 0

Wind: 9 mph

Hourly Air Quality Forecast - AQI (US EPA)

9 AM

55 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.85 µg/m³
PM₁₀: 3.39 µg/m³
O₃: 0.056 ppm
NO₂: 0.8 ppb
SO₂: 0.2 ppb
CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

10 AM

51 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.77 µg/m³
PM₁₀: 3.28 µg/m³
O₃: 0.054 ppm
NO₂: 1.1 ppb
SO₂: 0.2 ppb
CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

11 AM

50 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.74 µg/m³
PM₁₀: 3.33 µg/m³
O₃: 0.053 ppm
NO₂: 1.3 ppb
SO₂: 0.3 ppb
CO: 0.13 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

12 PM

52 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 1.82 µg/m³
PM₁₀: 3.79 µg/m³
O₃: 0.055 ppm
NO₂: 1.5 ppb
SO₂: 0.3 ppb
CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

1 PM

55 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.05 µg/m³
PM₁₀: 4.39 µg/m³
O₃: 0.056 ppm
NO₂: 1.6 ppb
SO₂: 0.3 ppb
CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

2 PM

59 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.3 µg/m³
PM₁₀: 4.79 µg/m³
O₃: 0.057 ppm
NO₂: 1.5 ppb
SO₂: 0.3 ppb
CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

3 PM

64 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.47 µg/m³
PM₁₀: 4.93 µg/m³
O₃: 0.058 ppm
NO₂: 1.4 ppb
SO₂: 0.2 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

4 PM

68 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.48 µg/m³
PM₁₀: 4.83 µg/m³
O₃: 0.060 ppm
NO₂: 1.4 ppb
SO₂: 0.2 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

5 PM

70 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.38 µg/m³
PM₁₀: 4.64 µg/m³
O₃: 0.061 ppm
NO₂: 1.6 ppb
SO₂: 0.2 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

6 PM

73 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.21 µg/m³
PM₁₀: 4.23 µg/m³
O₃: 0.061 ppm
NO₂: 1.7 ppb
SO₂: 0.2 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

7 PM

75 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.11 µg/m³
PM₁₀: 3.92 µg/m³
O₃: 0.062 ppm
NO₂: 1.9 ppb
SO₂: 0.2 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

8 PM

77 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.12 µg/m³
PM₁₀: 3.86 µg/m³
O₃: 0.063 ppm
NO₂: 1.8 ppb
SO₂: 0.2 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

9 PM

76 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.21 µg/m³
PM₁₀: 4.21 µg/m³
O₃: 0.062 ppm
NO₂: 1.8 ppb
SO₂: 0.2 ppb
CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

10 PM

74 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.35 µg/m³
PM₁₀: 4.87 µg/m³
O₃: 0.062 ppm
NO₂: 1.6 ppb
SO₂: 0.2 ppb
CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

11 PM

71 AQI

Moderate air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 2.44 µg/m³
PM₁₀: 5.43 µg/m³
O₃: 0.061 ppm
NO₂: 1.4 ppb
SO₂: 0.2 ppb
CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Port St. Lucie

Moderate Expected Likely

Rip Current Statement

Rip Current Statement issued March 18 at 12:33AM EDT until March 20 at 3:00AM EDT by NWS Melbourne FL

Mar 18, 12:33 AM → Mar 20, 3:00 AM

WHAT: Dangerous rip currents.

WHERE: Coastal Volusia, Indian River, Saint Lucie, Coastal
Martin, and Brevard Counties.

WHEN: Through late Thursday night.

IMPACTS: Rip currents can sweep even the best swimmers away
from shore into deeper water.

+ Read More

Rip currents are powerful channels of water flowing quickly away from shore, which occur most often at low spots or breaks in the sandbar and in the vicinity of structures such as jetties and piers. Heed the advice of lifeguards, beach patrol flags and signs. Entering the surf is strongly discouraged. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.

Updated: Mar 18, 7:59 AM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

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Weather Alerts and Warnings for Port St. Lucie

Rip Current Statement

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