Today | Weather | Wednesday, May 20, 2026

Active Weather Warnings

Rip Current Statement

Weather in Port St. Lucie, Florida

04:53 PM

Now

84° F

Feels Like 90°

Precipitation 7 %

Wind 13 mph

UV Index (0 - 11+) 3

Humidity 64 %

Today

Day 86°

Night 72°

Precipitation 25 %

Wind 10 mph

UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Port St. Lucie Weather Forecast Updated

Last updated on May 20, 2026 at 3:51 PM

Weather Forecast History

Last Year's Weather on This Day (May 20, 2025)

Day

95°

Night

73°

Wind

9 mph

UV Index

Precipitation

25 %

Air Quality in Port St. Lucie

NOW

36 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 2.32 µg/m³

PM₁₀ 3.5 µg/m³

O₃ 0.039 ppm

NO₂ 0.6 ppb

SO₂ 0.2 ppb

CO 0.09 ppm

NH₃ 0.14 µg/m³

NO 0.16 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 considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 2.32 µg/m³

PM₁₀ – 3.5 µg/m³

O₃ – 76.44 µg/m³

NO₂ – 1.21 µg/m³

SO₂ – 0.55 µg/m³

CO – 102.27 µg/m³

NH₃ – 0.14 µg/m³

NO – 0.16 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 May 20 at 2:39AM EDT until May 21 at 4:00AM EDT by NWS Melbourne FL

May 20, 2:39 AM → May 21, 4:00 AM

WHAT: Numerous dangerous rip currents.

WHERE: The beaches of Volusia, Brevard, Indian River, Saint
Lucie, and Martin counties.

WHEN: Through late tonight.

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: May 20, 3:51 PM Source: NWS Alert