(BIVN) – The national Weather Service in Honolulu has issued another High Surf Advisory for Hawaiʻi Island, as a large northwest swell “will rapidly build from northwest to southeast down the island chain today.”

The surf is expected to rise to 12 to 18 feet along exposed north facing shores, peaking tonight into Wednesday morning, then slowly lower Wednesday afternoon, forecasters say.

“The combination of strong north to northeast winds, large surf, and above normal high tide levels, will increase the risk for significant beach erosion and possibly lead to some minor overwash onto coastal roadways,” the National Weather Service says. “Beachgoers, swimmers, and surfers should heed all advice given by ocean safety officials and exercise caution. Boaters should expect recreational surfers and body boarders utilizing harbor channels to access surfing areas.”

The other Hawaiian islands are under a High Surf Warning. North facing shores could see surf up to 20 to 30 feet high.