Today | Weather | Wednesday, January 7, 2026

Active Weather Warnings

Wind Advisory

Weather in Lake Forest, California

11:46 PM

Now

54° F

Feels Like 46°

Precipitation 0 %

Wind 15 mph

Humidity 32 %

Today

Day 64°

Night 50°

Precipitation 6 %

Wind 7 mph

UV Index (0 - 11+) 3

Lake Forest Weather Forecast Updated

14 minutes ago

Last updated on January 07, 2026 at 11:31 PM

Air Quality in Lake Forest

NOW

41 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 3.8 µg/m³

PM₁₀ 13.64 µg/m³

O₃ 0.044 ppm

NO₂ 0.8 ppb

SO₂ 0.2 ppb

CO 0.12 ppm

NH₃ 0.11 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 considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 3.8 µg/m³

PM₁₀ – 13.64 µg/m³

O₃ – 86.32 µg/m³

NO₂ – 1.54 µg/m³

SO₂ – 0.59 µg/m³

CO – 133.85 µg/m³

NH₃ – 0.11 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Lake Forest

Moderate Expected Likely

Wind Advisory

Wind Advisory issued January 7 at 7:25PM PST until January 9 at 1:00PM PST by NWS San Diego CA

Jan 8, 9:00 PM → Jan 9, 1:00 PM

WHAT: Northeast winds 15 to 25 mph with gusts 35 to 45 mph
expected. Strongest winds are expected east of Interstate 5 and
near the foothills of the Santa Ana mountains.

WHERE: Orange County Inland Areas.

WHEN: From 9 PM Thursday to 1 PM PST Friday.

IMPACTS: Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.

+ Read More

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.

Updated: Jan 7, 11:31 PM Source: NWS Alert