Here is this week’s weather forecast by PG&E meteorologist John Lindsey.
An upper-level ridge of high pressure will shift west today, sending the North County into a brief warming trend with daytime highs rising to the mid-90s this afternoon.
Marine low clouds and fog will once again burn back to the beaches today, giving way to clear skies in the coastal valleys. In the coastal valleys, high temperatures will reach the high 70s.
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At the beaches, mostly clear skies will develop by the afternoon hours. Beach temperatures will range from the low-60s along the northwesterly facing beaches (Morro Bay, Los Osos, Montaña De Oro and the Nipomo Mesa); the mid-60s along the westerly facing beaches (Pismo Beach, Grover Beach and Cambria); to the high 60s along the southwesterly facing beaches (Cayucos, Avila Beach and Shell Beach).
Temperatures will top out Tuesday with high 90s to the low 100s across the North County, low 80s in the coastal valleys and the mid-60s to low 70s along the beaches.
An upper-level low pressure trough then sets up off the Pacific northwest coast on Wednesday, increasing the northwesterly (onshore) winds and providing cool and dry conditions across the Central Coast. A deeper marine layer and fresh to strong (25- to 31-mph) winds will keep temperatures slightly below normal for most of the workweek, with temperatures gradually warming to above-normal levels by the weekend.
Today’s 3- to 5-foot northwesterly (310-degree deep-water) swell (with an 8- to 11-second period) will remain at this height and period through Wednesday morning.
Increasing northwesterly winds will generate a 4- to 6-foot northwesterly (315-degree deep-water) sea and swell (with a 5- to 9-second period) along our coastline on Wednesday afternoon. This 4- to 6-foot northwesterly sea and swell will remain at this height and period through Sunday.
Arriving from the Southern Hemisphere:
A 1-foot southern hemisphere (175-degree deep-water) swell (with an 18- to 20-second period) will arrive along our coastline today, increasing to 1 to 2 feet (with a 15- to 17-second period) on Tuesday through Wednesday.
A 1- to 2-foot southern hemisphere (225-degree deep-water) swell (with a 17- to 19-second period) will arrive along our coastline Friday, increasing to 1 to 3 feet (with a 15- to 17-second period) on Saturday through Sunday.
Seawater temperatures will range between 54 and 56 degrees through Wednesday, decreasing to 52 and 54 degrees on Thursday through Sunday.