Today | Weather | Monday, July 20, 2026

Active Weather Warnings

High Surf Advisory

Weather in Chula Vista, California

04:41 PM

Now

75° F

Feels Like 75°

Precipitation 20 %

Wind 9 mph

UV Index (0 - 11+) 3

Humidity 64 %

Today

Day 81°

Night 66°

Precipitation 49 %

Wind 6 mph

UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Chula Vista Weather Forecast Updated

8 minutes ago

Last updated on July 20, 2026 at 4:32 PM

Weather Forecast History

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

Day

72°

Night

63°

Wind

5 mph

Precipitation

1 %

Air Quality in Chula Vista

NOW

35 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 5.26 µg/m³

PM₁₀ 14.42 µg/m³

O₃ 0.037 ppm

NO₂ 0.1 ppb

SO₂ 0.2 ppb

CO 0.07 ppm

NH₃ 0 µg/m³

NO 0.05 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 – 5.26 µg/m³

PM₁₀ – 14.42 µg/m³

O₃ – 73.27 µg/m³

NO₂ – 0.23 µg/m³

SO₂ – 0.56 µg/m³

CO – 82.8 µg/m³

NH₃ – 0 µg/m³

NO – 0.05 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Chula Vista

Minor Expected Likely

High Surf Advisory

High Surf Advisory issued July 20 at 2:06PM PDT until July 21 at 11:00PM PDT by NWS San Diego CA

Jul 20, 2:06 PM → Jul 21, 11:00 PM

WHAT: Large breaking waves of 4 to 7 feet with sets up to 8
feet at south or southwest facing beaches.

WHERE: San Diego County Coastal Areas and Orange County
Coastal Areas.

WHEN: Until 11 PM PDT Tuesday.

IMPACTS: Dangerous swimming and surfing conditions and
localized beach erosion.

ADDITIONAL DETAILS: South swell of 4 to 5 feet with a period
of 11-13 seconds generating high surf, primarily for south-
facing beaches. High risk of rip currents exists with high
surf and strong longshore currents are expected on west-facing
beaches. High tides will generally be at or below 5.5 feet,
but localized areas of beach erosion and minor tidal overflow
may occur with the high surf during high tides. Swell and surf
will decrease late Tuesday into Wednesday.

+ Read More

Inexperienced swimmers should remain out of the water due to dangerous surf conditions.

Updated: Jul 20, 4:32 PM Source: NWS Alert