Temps look to be near their peak Wednesday inland as an upper level ridge zips over the area. It’ll be replace quickly by a trough digging into the Pac NW. The result will be mid to upper 90s again Wednesday but a fast flip back into the 80s Thursday and Friday.
At the coast the marine layer has been squished down by this ridge. That means the coastal valleys have cleared out nicely but the beach clouds have been more stubborn thanks to the strength of the temperature inversion cap on top of the clouds.
The coolest day inland will be Friday inland with highs in the lower to mid 80s. This trough digging into the Pac NW is why. It pulls out quickly and we are back to 90+ inland by Sunday.
High pressure over the SW will drive another hot day Wednesday but cooler with wind Thursday and Friday before inland temps jump back into the 90s Sunday into next week.
All that changes Thursday and Friday as the trough will not only deepen the marine clouds but should also crank up the winds Friday for more sunshine but also cool to mild conditions because that wind will be onshore.
The onshore winds weaken over the weekend and not only will inland temps leap back quickly but also the coastal temps are set to jump back into the 80s at the coastal valleys and beaches could be in the mid-70s on the weekend (best chance for the warmest beach day is Sunday but both look good).
The thing to watch for is the potential for a stronger offshore event Sunday into early next week. It is a safe bet inland temps jump early next week but if some models are right the coast could also be hot but right now playing that part of the forecast conservatively.