SAN DIEGO — San Diego County can expect a mostly sunny day Sunday with variable high clouds, temperatures above seasonal averages and a sea breeze by early afternoon, weather forecasters said.

The marine layer and onshore flow will continue to bring areas of coastal low clouds and fog during the nights and mornings through Tuesday, according to a forecast summary issued at 9:30 a.m. Sunday.

The National Weather Service said Sunday's expected high in downtown San Diego was 63.

The formation of a coastal eddy could help to spread the marine layer clouds and fog farther inland Sunday night and again Monday night. 

SUNDAY MICROCLIMATE HIGHS:

  • Coastal highs near 65°, normal around 65°
  • Inland highs near 70°, normal around 70°
  • Mountain highs near 65°, normal around 52°
  • Desert highs near 78°, normal around 71°

By next week, there is a potential for locally strong Santa Ana winds to return to the forecast. A trough of low pressure will move in by the start of next week with high pressure building in over the Great Basin behind it. This will trigger offshore winds Monday night through Thursday. Models are hinting the strongest winds will be late Tuesday through Wednesday.

At the same time, a high pressure ridge over the Pacific will track closer to the West Coast. In response, our daytime highs will peak several degrees above average by midweek.