(BIVN) – The National Weather Service has issued a High Surf Advisory for north-facing shores of Hawaiʻi Island.

“A large north-northwest swell will peak today, producing dangerously high surf along exposed north and west facing shores of most of the smaller islands,” forecasters say. “North facing shores of the Big Island exposed to north-northwest swell will be affected as well. Surf will gradually lower Thursday through Friday.”

Surf heights will be 10 to 15 feet along north facing shores of the Big island exposed to north-northwest swell.

The islands to the west of Hawaiʻi will see larger surf heights: 16 to 24 feet along north and west facing shores of Niihau and Kauai, and along north facing shores of Oahu, the National Weather Service says, as well as 15 to 20 feet along north facing shores of Molokai and Maui.

The swell will be peaking today and decreasing through Thursday and Friday, forecasters say.

“We will continue to monitor should the swell peak higher than forecast, requiring a warning,” the National Weather Service wrote in a morning discussion.