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Official · NWS

Extreme Heat Warning

until 3:00 am

Extreme Heat Warning issued October 2 at 9:13PM PDT until October 8 at 8:00PM PDT by NWS San Diego CA

Full text

* WHAT...Dangerously hot conditions with high temperatures ranging from the mid 80s to lower 90s near the coast to the mid 90s to low 100s for the mesas and other higher coastal terrain expected. Nights will be very warm with low temperatures mostly in the 70s. * WHERE...San Diego County Coastal Areas. * WHEN...Until 8 PM PDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

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.

San Diego County Coastal Areas

Computed

Heat advisory

Sat

Feels-like high near 35°C.

Computed

Heat advisory

Sun

Feels-like high near 34°C.

Computed

Heat advisory

Mon

Feels-like high near 32°C.

San Diego Hourly Weather

California 3:59 am local updated now

Clear sky

74°

Clear sky

Feels like 74°

96° 73° today's high / low

+20.4° vs normal — extraordinarily warm

100

Perfect

Outdoor comfort right now

It is 74°F and clear sky in San Diego. Nothing wet on the radar for the next 24 hours. Temperatures climb about 11°F over the next six hours. Tomorrow: clear sky, high 94°F.

  • Pressure steady slowly 29.80 inHg
  • Wind 5 mph N
  • Humidity 62%
  • Cloud 0%
  • UV peak 8
  • Rain chance 1%

Next 48 hours

Scroll sideways — or pick a day below.

Now

Clear sky

0

4am

Clear sky

5

5am

Clear sky

6

6am

Clear sky

6

7am

Clear sky

7

8am

Clear sky

7

9am

Clear sky

7

10am

Clear sky

6

11am

Clear sky

5

12pm

Clear sky

5

1pm

Clear sky

7

2pm

Clear sky

9

3pm

Clear sky

10

4pm

Clear sky

1%

10

5pm

Clear sky

9

6pm

Clear sky

7

7pm

Clear sky

6

8pm

Clear sky

6

9pm

Clear sky

6

10pm

Clear sky

6

11pm

Clear sky

5

12am

Sun

Clear sky

5

1am

Clear sky

5

2am

Clear sky

5

3am

Clear sky

5

4am

Clear sky

5

5am

Clear sky

5

6am

Clear sky

5

7am

Clear sky

5

8am

Clear sky

4

9am

Clear sky

4

10am

Clear sky

4

11am

Clear sky

5

12pm

Clear sky

6

1pm

Clear sky

7

2pm

Clear sky

8

3pm

Clear sky

9

4pm

Clear sky

9

5pm

Clear sky

9

6pm

Clear sky

8

7pm

Clear sky

6

8pm

Clear sky

6

9pm

Clear sky

6

10pm

Clear sky

6

11pm

Clear sky

7

12am

Mon

Clear sky

7

1am

Clear sky

7

2am

Clear sky

7

Conditions in detail

  • Feels like

    74°

    About what it looks like

  • Dew point

    64°

    Noticeably humid

  • Wind

    5 mph

    Gusting 6 mph from N

  • Pressure

    29.80 inHg

    Steady slowly

  • Visibility

    9.9 mi

    Clear

  • UV index

    0

    Peaks at 8 today

  • Cloud cover

    0%

    —

  • Precipitation today

    0.00"

    None expected

Air quality

US AQI

74

Moderate

  • PM2.5 20 µg/m³
  • PM10 22 µg/m³
  • Ozone 21 µg/m³
  • NO₂ 43 µg/m³

Hour-by-hour forecast for San Diego

Every hour for the next 48 hours, local time.

Time Conditions Temp Feels Chance Amount Wind Humidity
Saturday Oct 3
3am Clear sky Clear sky 73° 73° 0% — 0 mph 72%
4am Clear sky Clear sky 76° 76° 0% — 5 mph 61%
5am Clear sky Clear sky 76° 76° 0% — 6 mph 59%
6am Clear sky Clear sky 76° 76° 0% — 6 mph 56%
7am Clear sky Clear sky 76° 76° 0% — 7 mph 53%
8am Clear sky Clear sky 79° 79° 0% — 7 mph 49%
9am Clear sky Clear sky 84° 83° 0% — 7 mph 44%
10am Clear sky Clear sky 89° 88° 0% — 6 mph 38%
11am Clear sky Clear sky 93° 91° 0% — 5 mph 34%
12pm Clear sky Clear sky 95° 93° 0% — 5 mph 32%
1pm Clear sky Clear sky 96° 94° 0% — 7 mph 31%
2pm Clear sky Clear sky 96° 95° 0% — 9 mph 31%
3pm Clear sky Clear sky 96° 94° 0% — 10 mph 32%
4pm Clear sky Clear sky 95° 93° 1% — 10 mph 33%
5pm Clear sky Clear sky 95° 93° 0% — 9 mph 34%
6pm Clear sky Clear sky 92° 91° 0% — 7 mph 37%
7pm Clear sky Clear sky 87° 87° 0% — 6 mph 41%
8pm Clear sky Clear sky 85° 85° 0% — 6 mph 45%
9pm Clear sky Clear sky 83° 83° 0% — 6 mph 48%
10pm Clear sky Clear sky 81° 82° 0% — 6 mph 51%
11pm Clear sky Clear sky 80° 80° 0% — 5 mph 54%
Sunday Oct 4
12am Clear sky Clear sky 79° 79° 0% — 5 mph 55%
1am Clear sky Clear sky 78° 78° 0% — 5 mph 56%
2am Clear sky Clear sky 78° 78° 0% — 5 mph 54%
3am Clear sky Clear sky 78° 78° 0% — 5 mph 53%
4am Clear sky Clear sky 78° 78° 0% — 5 mph 53%
5am Clear sky Clear sky 77° 77° 0% — 5 mph 55%
6am Clear sky Clear sky 76° 76° 0% — 5 mph 58%
7am Clear sky Clear sky 76° 76° 0% — 5 mph 57%
8am Clear sky Clear sky 78° 78° 0% — 4 mph 53%
9am Clear sky Clear sky 84° 83° 0% — 4 mph 47%
10am Clear sky Clear sky 90° 89° 0% — 4 mph 42%
11am Clear sky Clear sky 93° 92° 0% — 5 mph 39%
12pm Clear sky Clear sky 93° 92° 0% — 6 mph 37%
1pm Clear sky Clear sky 94° 92° 0% — 7 mph 37%
2pm Clear sky Clear sky 93° 92° 0% — 8 mph 38%
3pm Clear sky Clear sky 92° 91° 0% — 9 mph 40%
4pm Clear sky Clear sky 90° 90° 0% — 9 mph 42%
5pm Clear sky Clear sky 89° 88° 0% — 9 mph 44%
6pm Clear sky Clear sky 87° 86° 0% — 8 mph 47%
7pm Clear sky Clear sky 84° 84° 0% — 6 mph 50%
8pm Clear sky Clear sky 82° 83° 0% — 6 mph 54%
9pm Clear sky Clear sky 81° 82° 0% — 6 mph 56%
10pm Clear sky Clear sky 80° 82° 0% — 6 mph 58%
11pm Clear sky Clear sky 79° 79° 0% — 7 mph 60%
Monday Oct 5
12am Clear sky Clear sky 79° 79° 0% — 7 mph 61%
1am Clear sky Clear sky 78° 78° 0% — 7 mph 62%
2am Clear sky Clear sky 77° 77° 0% — 7 mph 63%

About this San Diego forecast

Updated 2026-10-03 10:59 UTC, and refreshed automatically every few minutes. Forecast data is provided by Visual Crossing; radar frames from RainViewer; the 20-year normals and records from the ERA5 reanalysis archive. No national weather service publishes point alerts here, so only computed watches are shown.

Watches labelled computed are worked out on this site from forecast thresholds and are not official warnings — always defer to your national weather service. Need help reading a number? See the sourced weather guide.

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