San Luis Obispo County is going on day three of a heat advisory that is covering the inland valley communities. Wednesday is expected to be the hottest day of the week, but Tuesday will be hard to beat. On Tuesday, San Miguel reached 101 degrees, but the peak daytime high for Wednesday is 105 degrees. The advisory will remain in place through 7:00 p.m. Thursday before temperatures across the interiors return to near average for the weekend.
The rest of the Central Coast will have mild to moderate conditions Wednesday. The coastal valleys will range from the mid-70s to the low 80s, while the beaches will have a mix of mid-60s and low 70s. Mostly sunny skies are in the forecast for Wednesday, but as onshore flow increases Thursday so will marine layer.
Northwesterly winds will be mild for the Central Coast Wednesday with potential to increase across the inland valleys by the afternoon. Paso Robles and San Miguel could experience wind gusts close to 24 mph. Wind speeds will be similar for the south coast, except winds will be shifting out of the southwest.
There will be a shift in the forecast Friday as an upper level low develops off the coast, bringing continued cooling and cloudy skies. Plus, there's about a 40% chance of light showers by Saturday morning. The weekend forecast will also include increased overnight clouds and fog, but as onshore flow backs off Sunday, temperatures will slightly increase.