Hot sunny day with palm trees. Photo via Pexels.com
Hot sunny day with palm trees. Photo via Pexels.com

Hot conditions will continue through the week for the inland parts of San Diego County, with gradually lower temperatures into next weekend, the National Weather Service said Sunday.

“Inland temperatures will remain above seasonal averages and next Saturday looks like it will be the coolest day but even then, temperatures will still be as much as 6 degrees above seasonal averages in the mountains and deserts,” forecasters said.

An excessive heat warning is in effect until at least 8 p.m. Monday, including in county valleys, El Cajon, Poway, San Marcos, Santee, La Mesa, and Escondido. Dangerously hot conditions and temperatures from 90 to 100 degrees are expected.

Valley areas in the western parts of the county could see highs in the upper 80s, while slightly warmer conditions near the foothills are expected, with temperatures possibly hitting the triple digits.

Coastal areas are anticipating partly cloudy conditions and patchy fog in the mornings this week, with breezes and highs in the mid-70s.

Downtown San Diego had a high near 78 Sunday, with mostly sunny conditions. Patchy fog is expected after 11 p.m., with a low around 64.

Monday’s San Diego surf forecast includes a moderate-risk rip current, with surf height from 2 to 4 feet and mixed south swell from 210 degrees and west swell from 290 degrees.

Fog with visibility from 1 to 3 nautical miles along the near-shore waters is expected to persist Sunday night into late Monday morning.

Otherwise, no hazardous marine conditions are expected through Thursday.

City News Service contributed to this report.