High surf building for shores of Ni‘ihau, Kaua‘i

A high surf advisory was issued for north- and west-facing shores of Ni‘ihau and Kaua‘i as a large, medium-period northwest (330-340 degree) swell begins to fill in today.

According to the National Weather Service in Honolulu, that swell will be followed by an overlapping long-period north-northwest (350-degree) swell that will build tonight into Tuesday.

Surf heights of up to 10 to 15 feet are expected along north-facing shores today, building to 12 to 16 feet on Tuesday. Surf heights of 8 to 12 feet along west-facing shores are expected.

The advisory is slated to last until 6 a.m. Wednesday.

The surf is expected to have moderate impacts. Strong breaking waves and currents will make swimming dangerous.