By
May 8, 2026 / 6:49 AM PDT / CBS LA
Southern California is preparing to have a [major warm-up over the Mother's Day weekend](https://forecast.weather.gov/product.php?site=lox&issuedby=LOX&product=AFD) with summer-like conditions returning to the region.
A high-pressure system is moving in from the west and will cause a shift in the forecast beginning on Friday. Temperatures will reach the mid-70s to 80s across most communities and climb to the 80s and 90s over the weekend through Tuesday.
The [National Weather Service](https://www.weather.gov/lox/) says there is a chance that temperatures could reach 100 degrees in parts of the valleys on Sunday and Monday. Weather officials recommend people stay in well-shaded or air-conditioned spaces, limit outdoor activities, stay hydrated and take frequent breaks.
Maximum temperatures over the next few days:
* Los Angeles: 86
* Pasadena: 91
* Ventura: 76
* Santa Clarita: 95
* Camarillo: 80
* Simi Valley: 90
On Sunday, there will still be a marine layer near the coast in the morning, but it will clear in the afternoon. That is when temperatures are expected to climb into the mid-90s in the coastal valleys, mid-80s in downtown LA and mid-70s by the beaches.
The NWS says the hottest day of the heat wave will be on Monday. Most communities across the region will be in the 80s to mid-90s.
Conditions will cool out by the end of the week.
© 2026 CBS Broadcasting Inc. All Rights Reserved.