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Extreme Heat Warning Issued for San Diego County Coastal Areas

October 1, 2026 · wweather1 editorial · 1 min read

The National Weather Service has issued an Extreme Heat Warning for San Diego County Coastal Areas, effective from 10:00 AM Friday until 8:00 PM PDT Thursday. Dangerously hot conditions are expected throughout the affected region.

The National Weather Service in San Diego, California, issued the warning on October 1 at 1:12 PM PDT. The alert covers San Diego County Coastal Areas, where dangerously high temperatures are expected to persist through the week.

High temperatures near the coast are forecast to range from the mid-80s to lower 90s. Higher coastal terrain and mesa areas will experience warmer conditions, with highs reaching from the mid-90s to around 100 degrees.

Overnight conditions will remain unusually warm throughout the period. Low temperatures are expected to stay mostly in the lower to mid-70s.

The Weather Service notes that extreme heat events significantly increase the risk of heat-related illnesses.

Why it is dangerous and what to do

⚠️ Safety
• Drink plenty of fluids and stay in air-conditioned rooms.
• Stay out of the sun and limit outdoor exposure.
• Check up on relatives and neighbors.
• Do not leave young children or pets in unattended vehicles.
📊 The numbers, from wweather1 data
San Diego: now +27°, Clear.
That is 5° above the October climate norm.
The record for this date is +37° (1945).
Three-day forecast: 1 October: +28°/+19° · 2 October: +35°/+18° · 3 October: +36°/+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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