Here is this week’s weather forecast by PG&E meteorologist John Lindsey.
High pressure will continue to weaken and shift eastward as an upper-level trough develops off the West Coast.
Strong to gale-force (25- to 38-mph) afternoon northwesterly winds will develop along the coast, which will bring below-normal daytime highs to the North County. Closer to the coast, marine low clouds with areas of mist will develop during the night and morning hours. This condition also will produce sundowner winds along the southern Santa Barbara County coastline.
Monday’s maximum temperatures are expected to reach the high 80s in Paso Robles, while San Luis Obispo will reach the mid-70s. High temperatures along the beaches will range from the mid-60s along the northwesterly facing beaches of Morro Bay, Los Osos, Montaña de Oro and Nipomo, and the high 60s along the westerly facing beaches of Cambria, Grover Beach and Pismo Beach. The southwesterly facing beaches of Cayucos and Avila Beach will be in the 70s, while the southern Santa Barbara County coastline is expected to hit the high 80s.
A cold front is forecast to move southward down the California coastline Thursday, producing decreasing northwesterly winds and a deeper and more persistent marine layer with areas of night and morning dense fog into Friday.
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High pressure will build in behind this cold front and will produce strong to gale-force northwesterly winds Saturday into next Monday.
Temperatures will remain near to slightly below normal through the weekend, with long-range forecast models suggesting a gradual warming trend the following week.
Strong to gale-force (25- to 38-mph) northwesterly winds will generate a 3- to 5-foot northwesterly (320-degree, deep-water) sea and swell (with a 4- to 9-second period) Monday afternoon into Wednesday. A 3- to 4-foot northwesterly (300-degree, deep-
water) swell (with an 8- to 10-second period) will develop along our coastline Thursday into Friday.
Strong to gale-force (25- to 38-mph) northwesterly winds along the California coast will generate a 4- to 6-foot northwesterly (320-degree, deep-water) sea and swell (with a 4- to 9-second period) Saturday through next Monday.
From the Southwest
Hurricane Guillermo is expected to reach the Hawaiian Islands on Wednesday and Thursday as a tropical storm. Southwesterly swell from this tropical cyclone will arrive along our coastline Tuesday into Thursday at 1- to 2-feet (with an 11- the 13-second period).
Arriving from the Southern Hemisphere
A 1- to 2-foot Southern Hemisphere (185-degree, deep-water) swell (with a 16- to 18-second period) will arrive Monday and will continue at this height but with a gradually shorter period through Thursday.
Seawater temperatures will range between 54 and 57 degrees through Sunday.
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At PG&E, your safety is our first concern. The Central Coast will probably experience areas of dense fog during the late night and early morning hours. When driving in fog, reduce your speed and turn on your low-beam headlights and your fog lights if you have them.