Another heat wave will hit San Diego this week

A heat wave appears likely for inland San Diego County beginning this week, especially for the deserts, and could last a week or more, the National Weather Service said.

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The marine layer was expected to slowly decrease in depth through the weekend, but night and morning coastal low clouds still spread inland into portions of the valleys.

High temperatures for the valleys may go from being around 8 to 12 degrees below average Friday to around 4 to 8 degrees below average on Sunday.

The warming trend could continue into the middle of next week, with high temperatures mostly 5 to 10 degrees above average and with the lower deserts around 10 degrees above average.