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San Diego, California weather

Current conditions, hourly and 7-day forecast, official alerts, and air quality for San Diego, United States. Coordinates 32.72, -117.16 · America/Los_Angeles.

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ADVISORYalert level: Advisory

Heat Advisory

WeatherSignal priority 44/100

Heat Advisory issued August 28 at 11:46AM PDT until August 29 at 8:00PM PDT by NWS San Diego CA

Official severity:
Moderate
Urgency:
Expected
Certainty:
Likely
Issued by:
NWS San Diego CA
Starts:
8/28/2026, 6:46:00 PM
Expires:
8/29/2026, 5:15:00 AM
Area:
San Diego County Coastal Areas
Official recommended action

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Read the full official alert

San Diego, California

United States · America/Los_Angeles

81°F

Fog

Feels like 90° · High 88° / Low 73°

Precipitation
0%

Chance of measurable precipitation this hour

Wind
3 SWmph

Sustained wind speed and direction

Humidity
87%

How much moisture the air holds

Visibility
0.0mi

How far you can clearly see

Pressure
1010hPa

Falling pressure often means unsettled weather

Dew point
71°F

Above 65° feels muggy

UV index
9.4

8 or higher: limit midday sun

Air quality
94

US EPA AQI · Moderate

Sunrise 11 PM Sunset 11 AM Cloud cover 57% Wind direction SW

Source updated: 2:43:02 AM · WeatherSignal checked: 2:43:02 AM

Source: Open-Meteo (national weather-service models)

WeatherSignal Right Now

Plain-language answers calculated from this location's own forecast values — see how each one works on our methodology page.

Today's Weather Score

60/100

Mixed day

Starts at 100 and subtracts published penalties for heat, cold, rain, wind, UV, humidity, low visibility, and active official alerts.

  • Feels like 90° — warm-8
  • UV index 9.4 — very high-6
  • Dew point 71° — oppressive humidity-10
  • Visibility 0.0 mi-10
  • Active Heat Advisory-6
How this score is calculated

Right now

It's 81° but feels like 90°, fog, 87% humidity. 1 official alert in effect — see the warning above.

Today's high is 6° warmer than the average of the next 6 days.

  • Umbrella or nah?

    Nah(Favourable)

    Nothing in the next 12 hours reaches a 40% chance of rain. Peak chance is 0%.

    Why
    • Peak precipitation probability: 0%
    • Total expected precipitation: 0.00″

  • Best time today

    6 AM(Favourable)

    6 AM has the most comfortable combination of temperature, rain chance, wind, and humidity in the remaining daylight hours.

    Why
    • Feels like 73°
    • Rain chance 0%
    • Wind 4 mph
    • Humidity 96%

  • Car wash check

    Go for it(Favourable)

    No hour in the next 48 hours reaches a 50% chance of rain or measurable precipitation.

    Why
    • No precipitation at or above 50% chance within 48 hours
    • Current wind: 3 mph

  • Dog walk window

    6 AM(Favourable)

    6 AM is the calmest hour in the 25–85° feels-like range with rain chance under 40%.

    Why
    • Feels like 73°
    • Rain chance 0%

  • Cookout check

    Green light(Favourable)

    Between 4 PM and 9 PM: up to 0% rain chance, wind to 11 mph, feels like 79–98°.

    Why
    • Evening peak rain chance: 0%
    • Evening peak wind: 11 mph

  • Windows down?

    Crack them(Mixed)

    Feels like 90°, 0% rain chance, wind 3 mph. Comfortable range used here: 58–84° with rain chance under 20% and wind under 18 mph.

    Why
    • Feels like 90°
    • Rain chance 0%
    • Wind 3 mph

  • Hair weather

    Frizz risk high(Unfavourable)

    Relative humidity is 87% with a 71° dew point. Moisture in the air is what swells hair strands, so dew point matters more than temperature.

    Why
    • Humidity 87%
    • Dew point 71°

These are WeatherSignal calculations, not official forecasts or warnings. They never override guidance from your national weather service.

What this means

Generated from the forecast values above using fixed rules — not an AI guess.

  • A Heat Advisory issued by NWS San Diego CA is active for San Diego County Coastal Areas.
  • No significant precipitation is expected in the next 24 hours.
  • UV index is very high today — limit midday sun exposure.

Next 24 hours

Will it rain during your commute? When does the storm arrive?

Hourly forecast for the next 24 hours
TimeConditionTempFeelsPrecip %AmountWindHumidity
8 PMFog80°87°0%0.00″3 SSW89%
9 PMFog79°79°0%0.00″3 SSW90%
10 PMFog78°78°0%0.00″3 SW92%
11 PMFog77°77°0%0.00″3 ESE93%
12 AMFog76°76°0%0.00″2 NNE94%
1 AMFog76°76°0%0.00″2 WNW94%
2 AMFog75°75°0%0.00″5 WNW94%
3 AMFog74°74°0%0.00″5 NW96%
4 AMFog73°73°0%0.00″5 NNE96%
5 AMFog73°73°0%0.00″5 N97%
6 AMFog73°73°0%0.00″4 N96%
7 AMFog73°73°0%0.00″5 NW94%
8 AMFog77°77°0%0.00″5 NW91%
9 AMFog81°89°0%0.00″4 NW86%
10 AMFog85°97°0%0.00″5 W81%
11 AMFog87°102°0%0.00″8 W80%
12 PMFog88°103°0%0.00″9 W77%
1 PMFog88°104°0%0.00″12 WNW79%
2 PMFog87°104°0%0.00″13 WNW80%
3 PMFog87°102°0%0.00″12 WNW79%
4 PMMainly clear86°98°0%0.00″11 WNW76%
5 PMClear sky84°94°0%0.00″10 NW79%
6 PMClear sky82°90°0%0.00″10 WNW82%
7 PMClear sky79°85°0%0.00″9 WNW86%

7-day forecast

Confidence decreases the further out you look.

  • Today

    Fog

    88° / 73°

    Precip:
    0% · 0.00″
    Wind:
    13 mph
    UV:
    9.4
    Sun:
    11 PM–11 AM

  • Sun, Aug 30

    Clear sky

    84° / 71°

    Precip:
    0% · 0.00″
    Wind:
    10 mph
    UV:
    9.2
    Sun:
    11 PM–11 AM

  • Mon, Aug 31

    Overcast

    80° / 69°

    Precip:
    0% · 0.00″
    Wind:
    9 mph
    UV:
    7.3
    Sun:
    11 PM–11 AM

  • Tue, Sep 1

    Clear sky

    78° / 68°

    Precip:
    0% · 0.00″
    Wind:
    10 mph
    UV:
    0.0
    Sun:
    11 PM–11 AM

  • Wed, Sep 2

    Clear sky

    80° / 69°

    Precip:
    0% · 0.00″
    Wind:
    12 mph
    UV:
    0.0
    Sun:
    11 PM–11 AM

    Lower confidence — long-range outlook, not a certainty.

  • Thu, Sep 3

    Clear sky

    83° / 70°

    Precip:
    0% · 0.00″
    Wind:
    12 mph
    UV:
    0.0
    Sun:
    11 PM–11 AM

    Lower confidence — long-range outlook, not a certainty.

  • Fri, Sep 4

    Clear sky

    82° / 69°

    Precip:
    0% · 0.00″
    Wind:
    9 mph
    UV:
    0.0
    Sun:
    11 PM–11 AM

    Lower confidence — long-range outlook, not a certainty.

Forecasts describe likely conditions, not guaranteed outcomes. Official warnings from your national weather service always take precedence over anything shown here.

Air quality

US EPA AQI · Moderate

AQI
94

Moderate

Primary
Ozone

Highest measured pollutant

PM2.5
28.2µg/m³
PM10
33.5µg/m³
Ozone
97.0µg/m³
Dust
1.0µg/m³

Unusually sensitive people should consider shortening intense outdoor activity.

Air-quality guidance comes from the published category definitions of the source scale. WeatherSignal does not provide medical advice.

Source updated: not provided · WeatherSignal checked: 2:43:01 AM

Source: Open-Meteo Air Quality (CAMS / US EPA scale)

Radar & storm tracking

Animated precipitation radar centred on this area.

Air quality detail

Pollutants, category, and official guidance.

Travel & outdoor planning

Rain-free windows, commute weather, best time outside.

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