Today | Weather | Wednesday, March 18, 2026

Active Weather Warnings

Rip Current Statement

Weather in Port St. Lucie, Florida

06:47 AM

Now

61° F

Feels Like 57°

Precipitation 34 %

Wind 9 mph

Humidity 74 %

Today

Day 70°

Night 55°

Precipitation 84 %

Wind 15 mph

UV Index (0 - 11+) 2

Port St. Lucie Weather Forecast Updated

22 minutes ago

Last updated on March 18, 2026 at 6:24 AM

Weather Forecast History

Last Year's Weather on This Day (March 18, 2025)

Day

72°

Night

48°

Wind

12 mph

UV Index

Precipitation

0 %

Air Quality in Port St. Lucie

NOW

62 AQI

Moderate air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 2 µg/m³

PM₁₀ 3.73 µg/m³

O₃ 0.058 ppm

NO₂ 0.6 ppb

SO₂ 0.3 ppb

CO 0.13 ppm

NH₃ 1.17 µg/m³

NO 0 µg/m³

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

NH₃ – Ammonia

NO – Nitric oxide

Health Recommendations:

Air quality is acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 2 µg/m³

PM₁₀ – 3.73 µg/m³

O₃ – 113.65 µg/m³

NO₂ – 1.09 µg/m³

SO₂ – 0.71 µg/m³

CO – 143.61 µg/m³

NH₃ – 1.17 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

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, 6:24 AM Source: NWS Alert