San Diego, CA – San Diego County will remain under hot conditions through Wednesday, with some areas facing heat advisories and extreme heat warnings before a cooling trend brings temperatures below normal heading into the weekend, according to the National Weather Service (NWS).
Heat Advisories and Warnings in Place
The mountain areas of the county are under a heat advisory until Monday evening, while the desert regions face more severe conditions under an extreme heat warning through Tuesday evening as reported by Times of San Diego.
Meteorologists say a high-pressure system settling over the region is responsible for the spike in temperatures, creating what they describe as a “temperature rollercoaster” this week.
Forecasted High Temperatures
On Monday, temperatures are expected to reach:
- 71 to 76 degrees near the coast
- 78 to 82 degrees inland
- 81 to 85 degrees in the western valleys
- 89 to 94 degrees near the foothills
- 88 to 98 degrees in the mountains
- 111 to 115 degrees in the deserts
Cooling Pattern Arrives Midweek
The turning point is expected Wednesday, when a gradual cooling trend will begin. Temperatures are forecast to drop 3–5 degrees each day through Friday as the weather pattern shifts.
The marine layer is expected to strengthen and push further inland each morning, bringing cooler air to more areas across the county.
By the weekend, temperatures are projected to fall 5–10 degrees below normal, with the below-average pattern continuing into early next week.
How to Keep Yourself Safe in Extreme Heat
Health officials warn that extreme heat can be dangerous, especially for vulnerable populations such as young children, the elderly, and those with chronic health conditions.
Residents are urged to:
- Stay hydrated by drinking plenty of water throughout the day
- Avoid strenuous outdoor activity during peak heat hours (10 a.m. to 4 p.m.)
- Seek shade or air-conditioned spaces when possible
- Check on neighbors and relatives who may be at higher risk for heat-related illness
- Never leave children or pets unattended in vehicles
The NWS also reminds residents that heat-related illnesses, including heat exhaustion and heat stroke, can develop quickly and require immediate medical attention.
How do you plan to beat the heat in San Diego County this week? Share your tips below in the comments section.













