SAN DIEGO (FOX 5/KUSI) — After several days of warm, sunny weather, Southern California residents can expected a noticeable cooling trend this weekend with afternoon highs 10 to 20 degrees below seasonal averages. 

It comes as our marine layer deepens and an incoming system brings chances of light rain Saturday afternoon.

First up, overcast conditions later Thursday evening into Friday more with a more expansive and deeper marine layer. Expect patchy drizzle for early Friday but clearing of the clouds by late morning/early afternoon.

More weather: ➡️ Forecast | ⚠️ Alerts | 🗺️ Live Radar | 📧Newsletter

Daytime highs for the beaches and valleys will top out in the low to mid-60s with low 50s for the mountains and low 80s for the deserts.

Heading into Saturday, an area of low pressure from the Gulf of Alaska swings down the coast of California and pushes inland. The chances of moisture will ramp up late Friday into Saturday with the highest likelihood of light rainfall between 12 p.m. and 3 p.m. Saturday. 

There’s a possibility of a thunderstorm or two mainly focused in Orange and San Bernardino Counties.

Stronger onshore flow also sets up for the weekend as westerly winds pick up across the mountains and deserts. Expect gusts to reach 45 to 55 mph Friday afternoon through Saturday evening.

Stagecoach Country Music Festival in the Coachella Valley will be cooler than normal for this time of wind with gusty winds kicking up dust and dried grass. 

Drier and more stable air settle in for early next week as a warming trend follows. 

Copyright 2025 Nexstar Media Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.