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Extreme Heat Watch Issued for San Diego and Orange County Coastal Areas

August 22, 2026 · wweather1 editorial · 1 min read

The National Weather Service in San Diego has issued an Extreme Heat Watch for coastal areas in San Diego and Orange counties from Tuesday morning through Friday evening. High temperatures are forecast to reach the upper 80s to low 90s.

The National Weather Service San Diego CA issued the Extreme Heat Watch on August 22 at 1:10 PM PDT. The alert period begins on Tuesday morning, August 25, and remains in effect until Friday, August 28, at 8:00 PM PDT.

Dangerously hot conditions are expected across the affected region, which includes the San Diego County Coastal Areas and Orange County Coastal Areas. Daytime high temperatures are predicted to reach the upper 80s to low 90s, with limited overnight cooling as temperatures struggle to fall below the lower 70s.

The National Weather Service notes that heat-related illnesses increase significantly during extreme heat events. The prolonged heat and warm nighttime temperatures will especially affect individuals without access to air conditioning.

Why it is dangerous and what to do

⚠️ Safety
• Drink plenty of fluids.
• Stay in an air-conditioned room and remain out of the sun.
• Check up on relatives and neighbors.
📊 The numbers, from wweather1 data
San Diego: now +28°, Clear.
That is 4° above the August climate norm.
The record for this date is +34° (1944).
Three-day forecast: 23 August: +30°/+19° · 24 August: +29°/+20° · 25 August: +30°/+24°
The figures are computed automatically from the Open-Meteo/ERA5 archive — no eyeball estimates.

🌍 Weather in nearby cities

📰 Data source: NWS. Forecast and analysis — wweather1, based on Open-Meteo / met.no data.

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