Today | Weather | Wednesday, July 15, 2026

Active Weather Warnings

Coastal Flood Advisory

Weather in Charleston, South Carolina

06:02 PM

Now

84° F

Feels Like 93°

Precipitation 34 %

Wind 7 mph

UV Index (0 - 11+) 1

Humidity 79 %

Today

Day 84°

Night 75°

Precipitation 87 %

Wind 6 mph

UV Index (0 - 11+) 5

Charleston Weather Forecast Updated

Last updated on July 15, 2026 at 4:35 PM

Weather Forecast History

Last Year's Weather on This Day (July 15, 2025)

Day

88°

Night

77°

Wind

8 mph

UV Index

Precipitation

90 %

Air Quality in Charleston

NOW

40 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 4.78 µg/m³

PM₁₀ 5.36 µg/m³

O₃ 0.043 ppm

NO₂ 1.3 ppb

SO₂ 0.3 ppb

CO 0.13 ppm

NH₃ 0.07 µg/m³

NO 0.11 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 – 4.78 µg/m³

PM₁₀ – 5.36 µg/m³

O₃ – 85.08 µg/m³

NO₂ – 2.46 µg/m³

SO₂ – 0.73 µg/m³

CO – 143.84 µg/m³

NH₃ – 0.07 µg/m³

NO – 0.11 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Charleston

Minor Expected Likely

Coastal Flood Advisory

Coastal Flood Advisory issued July 15 at 2:09PM EDT until July 16 at 12:00AM EDT by NWS Charleston SC

Jul 15, 8:00 PM → Jul 16, 12:00 AM

WHAT: Up to one half foot of inundation above ground level
expected along shorelines and tidal waterways (7.2 to 7.4 feet
Mean Lower Low Water at Charleston).

WHERE: Coastal Colleton and Charleston Counties.

WHEN: From 8 PM this evening to midnight EDT tonight.

IMPACTS: This could result in some roads becoming impassable.

ADDITIONAL DETAILS: High tide will occur around 9:53 PM today
at Charleston. Saltwater inundation will be possible 1 to 2
hours before and after high tide.

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If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Visit water.weather.gov for additional water level and flood impact information.

Updated: Jul 15, 4:35 PM Source: NWS Alert