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

August 24, 2026 · wweather1 editorial · 1 min read

The National Weather Service in San Diego has issued an Extreme Heat Watch for coastal areas of San Diego and Orange counties, in effect from Tuesday morning through Friday evening. Possible daytime temperatures will range from 85 to 92 degrees.

The National Weather Service in San Diego, California, issued the alert on August 23 at 9:40 PM PDT. The watch applies to San Diego County Coastal Areas and Orange County Coastal Areas, taking effect on August 25 at 10:00 AM PDT and lasting through August 28 at 8:00 PM PDT.

Daytime temperatures between 85 and 92 degrees are forecasted for the affected areas. Additionally, overnight low temperatures are expected to remain around 5 to 7 degrees above normal throughout the event.

According to the National Weather Service, heat-related illnesses increase significantly during extreme heat events. The elevated overnight temperatures will limit relief from the heat, particularly for individuals without access to adequate cooling.

Why it is dangerous and what to do

⚠️ Safety
• Drink plenty of fluids.
• Stay in an air-conditioned room and stay out of the sun.
• Check up on relatives and neighbors.
📊 The numbers, from wweather1 data
San Diego: now +34°, Clear.
That is 12° above the September climate norm.
The record for this date is +36° (1944).
Three-day forecast: 8 September: +37°/+24° · 9 September: +32°/+23° · 10 September: +26°/+22°
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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