An upper level ridge continues to build over The West. This will start to warm the inland valleys back up after several comfortable days. Thursday highs in northern SLO county will already near 100 and likely get there and stay there Friday into the middle of next week.
Coastal temps will also rise but some night and morning marine layer and afternoon onshore winds will keep temperatures from becoming extreme. I think coastal valleys will be in the upper 70s to middle 80s into the middle of next week.
Beaches are interesting, some will visit the 70s in the forecast but west0facing beaches stay in the mid to upper 60s.
The other element to consider in the forecast is some slight uptick of mugginess with the summer monsoon trying to push in from the east but thunderstorms don’t look to be an issue.