SLO County weather forecast for the week of July 17

Here is this week’s weather forecast by PG&E meteorologist John Lindsey.

A strong ridge of high pressure over much of the Western U.S. will produce warm to hot weather across the Central Coast away from the beaches.

Periods of smoke from wildfires and a few midlevel clouds associated with passing monsoonal moisture and chance for some isolated afternoon thunderstorms along the central and southern Sierra Nevada will develop today. Monday’s temperatures will range from the low 100s in the North County to the mid-80s in the coastal valleys. The beaches will remain in the 60s, except for Cayucos and Avila Beach, which will reach the 70s.

Cooler weather will then return Tuesday and Wednesday as a trough of low pressure will deepen along the West Coast and will help to weaken the dominant ridge of high pressure responsible for the recent warming trend. This condition will allow for the development of a deeper and more extensive marine layer. High temperatures for the California Mid-State Fair should remain below 100 degrees Wednesday; however, that may be the last day they do.

The remainder of the week will see gradual warming occur, with temperatures near the coast hovering around normal and interior locations remaining above average. High pressure could rebuild into the Central Coast by this weekend to bring another round of triple-digit temperatures across North County.

Surf report

Strong to gale-force (25 to 38 mph) northwesterly winds 50 miles off the coastline will continue to generate a 4- to 6-foot northwesterly (310-degree, deep-water) sea and swell (with a 5- to 9-second period) through Friday.

Seawater

Temperatures will range between 51 and 53 degrees through Friday.

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At PG&E, the safety of our customers and employees is our top priority. When temperatures are unusually high, avoid strenuous activities in hot, direct sunlight and drink plenty of water. Pay attention to your body. Muscle cramps, dizziness and nausea may be signs of a heat-related illness.

This story was originally published July 16, 2017 at 12:49 PM with the headline "SLO County weather forecast for the week of July 17."