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Today | Weather | Monday, March 16, 2026
Active Weather Warnings

Weather in San Diego, California

08:39 PM
Now
Cloudy Night
66° F
Feels Like 64°
Precipitation 0 %
Wind 5 mph
Humidity 69 %
Today
Cloudy Weather
Day 81°
Night 55°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 6

San Diego Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (March 16, 2025)
Cloudy Weather

Day

64°

Night

50°

Wind

4 mph

UV Index

6

Precipitation

0 %

Air Quality in San Diego

NOW
60 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 16.83 µg/m³
PM10 24.64 µg/m³
O3 0.048 ppm
NO2 0.3 ppb
SO2 0.2 ppb
CO 0.12 ppm
NH3 0 µg/m³
NO 0 µg/m³
PM2.5 – 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)
PM2.5 – 16.83 µg/m³
PM10 – 24.64 µg/m³
O3 – 93.36 µg/m³
NO2 – 0.61 µg/m³
SO2 – 0.43 µg/m³
CO – 133.38 µg/m³
NH3 – 0 µg/m³
NO – 0 µg/m³
View Hourly Air Quality Forecast

Weather Alerts and Warnings for San Diego

Severe Future Likely

Extreme Heat Watch

Extreme Heat Watch issued March 14 at 5:51AM PDT until March 20 at 8:00PM PDT by NWS San Diego CA
Mar 16, 10:00 AM → Mar 20, 8:00 PM
WHAT: Dangerously hot conditions with temperatures 85 to 90 near
the coast, up to 105 inland.

WHERE: Orange County Coastal Areas, Orange County Inland Areas,
San Bernardino and Riverside County Valleys-The Inland Empire, San
Diego County Coastal Areas, San Diego County Valleys, and Santa
Ana Mountains and Foothills.

WHEN: From Monday morning through Friday evening.

IMPACTS: Heat related illnesses increase significantly during
extreme heat events.

ADDITIONAL DETAILS: High temperatures next week will be 20 to
potentially 30 degrees above
normal for this time of year, where record breaking heat is likely.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
Updated: Mar 14, 11:17 AM Source: NWS Alert
Moderate Expected Likely

Beach Hazards Statement

Beach Hazards Statement issued March 16 at 12:19PM PDT until March 18 at 11:00PM PDT by NWS San Diego CA
Mar 16, 12:19 PM → Mar 18, 11:00 PM
WHAT: Surf of 3 to 5 feet, with sets to 6 feet.

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

WHEN: Through Wednesday evening.

IMPACTS: Moderate rip current risk and locally hazardous
swimming conditions.
+ Read More
A beach hazards statement is issued when threats such as rip currents and other hazards are possible. Caution should be used when in or near the water.
Updated: Mar 16, 6:58 PM Source: NWS Alert
Moderate Expected Likely

Heat Advisory

Heat Advisory issued March 16 at 9:16AM PDT until March 20 at 8:00PM PDT by NWS San Diego CA
Mar 16, 10:00 AM → Mar 20, 8:00 PM
WHAT: Hot conditions with temperatures 80 to 90 degrees near the
coast and 95 to 102, locally up to 105 degrees inland. Overnight
lows will be in the 60s.

WHERE: Orange County Coastal Areas, Orange County Inland Areas,
San Bernardino and Riverside County Valleys-The Inland Empire, San
Diego County Coastal Areas, San Diego County Valleys, and Santa
Ana Mountains and Foothills.

WHEN: Until 8 PM PDT Friday.

IMPACTS: Hot temperatures may cause heat illnesses. Increased
heat impacts due to long-duration early season heat wave.

ADDITIONAL DETAILS: High temperatures this week will be 20 to 30
degrees above normal for this time of year. Record breaking heat
is likely. Widespread Moderate to locally Major HeatRisk is
expected.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Updated: Mar 16, 6:58 PM Source: NWS Alert

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