Sunshine and Sudden Warmth: San Diego Braces for Near-80 Temps This Thursday

Morning: A Foggy Start Giving Way to Gold

San Diego residents waking up this Thursday, February 26, 2026, may find themselves shrouded in a familiar coastal blanket. Patchy fog is expected to linger across the region through the early morning hours, particularly in coastal and valley areas. However, as the sun climbs, the marine layer is predicted to retreat rapidly, making way for clear, bright skies by mid-morning. Temperatures will start in the high 50s, providing a crisp but comfortable commute for those heading out early.

Afternoon: Unseasonable Heat and Coastal Breezes

The main story for today is the significant warmup. Forecasters from the National Weather Service indicate that a ridge of high pressure is pushing temperatures well above the February average. Expect a daytime high near 79°F at San Diego International Airport, while inland coastal areas could see mercury levels reaching between 76°F and 84°F. This represents a "minor heat risk" for the region, as these temperatures are 10 to 20 degrees above the seasonal norm.

• Temperature Peak: Highs will reach approximately 79°F to 84°F between 1:00 PM and 3:00 PM.
• Wind Conditions: Light northerly winds in the morning will shift to the northwest at 5 to 10 mph in the afternoon.
• Wind Gusts: Occasional gusts may reach up to 20 mph near the immediate coast, offering a slight reprieve from the midday heat.

Evening: The Return of the Marine Layer

As the sun sets over the Pacific, the unseasonable heat will dissipate, leading to a pleasant and mild evening. Skies will remain mostly clear until late, allowing for a low of approximately 58°F. However, San Diegans should expect a return of the marine influence as the night progresses. Patchy fog is forecast to redevelop after 10:00 PM, moving inland and potentially impacting visibility on coastal highways by the early hours of Friday morning.

Weather Alerts and Safety

While there are no active rain or wind warnings, the National Weather Service has highlighted a cooling trend expected for early next week, making today and Friday the peak of this brief February heatwave. Residents are encouraged to stay hydrated and take advantage of the sunny conditions before the stormier patterns typically seen in late winter return. With humidity levels around 54% to 60%, the air will feel dry and warm throughout the day.