King tides, the highest tides of the year, will come to Puget Sound this week.

King tides occur when the Earth, moon and sun align and gravity causes unusually high tides. The high tide in Seattle was expected to be around 12.47 feet around 6:30 a.m. on Friday, according to the National Oceanic and Atmospheric Administration.

The high tide in Seattle is expected to reach 12.5 feet around 7:30 a.m. Saturday and 12.3 feet around 8:30 a.m. Sunday. Olympia area could see tides as high as about 16 feet this weekend.

More significant impacts are expected along the Pacific Coast, where the addition of high surf will bring water after the peak tide. The coastal area is seeing king tides between Wednesday and Friday.

A coastal flood advisory remains in effect for the immediate coast, including

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