SAN DIEGO — Thursday afternoon high temperatures will be above seasonal norms.
- Coastal highs 70-79, normal around 68.
- Inland highs 78-86, normal around 76.
- Mountain highs 74-81, normal around 61.
- Desert highs 90-95, normal around 85.
Moderate rip current risk. Water temperature 59-61. Wave heights 1'-3' with sets to 4' possible. Steep northwest swell and a continuing south swell.
The UV Index for San Diego is 9, very high. The EPA has issued a UV Alert for San Diego County due to an unusually high UV Index. UV radiation is highest from 10 AM to 4 PM. The EPA strongly recommends that precautions be taken to reduce the risk of overexposure.
Skies mostly clear with passing high clouds through the day. Humidity levels in the County are fairly humid. Coastal and inland dew points will hover around the 50s and steadily increase through the day. Mountain and desert dew points hover in the 30s and lower 40s.
The Week Ahead:
The high pressure ridge will begin to weaken on Friday as an area of low pressure moves towards California. Minor cooling will occur along the coast and spread inland on Friday. But, the mountains and desert will continue warming Friday.
A weak trough of low pressure will move into California from the northwest on Saturday. Temperatures will be much cooler, closer to seasonal average. Onshore winds will strengthen, with gusty winds in the mountains and deserts peaking Saturday afternoon and evening. The return of the marine layer will lead to morning low clouds and possibly fog through the weekend.
After the trough leaves the region Monday, higher pressure returns and pushes high temperatures up once again. Temperatures jump back up to 10-15 degrees above seasonal norms. The warming will continue through the next week.