High surf advisory extended into the weekend

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SAN DIEGO — Big waves expected to continue pounding parts of the San Diego County coastline Friday and throughout the weekend prompted meteorologists to extend a high surf advisory by three days.

A National Weather Service high surf advisory was initially set to expire at 10 p.m. Thursday, but will now remain in effect until 9 p.m. Sunday. The surf is expected to build to 4 to 8 feet with sets to 10 feet south of Solana Beach this weekend.

Forecasters said a second long-period west-northwest swell moving into Southern California coastal waters today would cause the big waves to persist. Surf heights are expected to be slightly lower Friday than Thursday, but will ramp up again on Saturday before decreasing Sunday night.

The waves may be high enough to top jetties or sea walls and may even reach the top of the Ocean Beach Pier at high tide.

The surf combined with strong rip currents may lead to dangerous ocean conditions — bad news for those attempting to beat the heat at the beaches. Forecasters said high temperatures today would again be “well above normal,” but slightly cooler this weekend.

On Thursday, a high of 85 degrees in El Cajon topped by 2 degrees the previous milestone for Feb. 25, set in 2002, according to the NWS.

High temperatures today were predicted to be 69 to 74 degrees near the coast, 75 to 80 degrees inland, 78 to 83 in the valleys, 74 to 80 degrees in the mountains and around 85 degrees in the deserts.