The National Weather Service has issued a high surf advisory from 8 a.m. today to 6 p.m. Sunday for the north and west shores of Niihau, Kauai, Oahu and Molokai and Maui’s north shore.

The surf will build quickly Friday morning and hit advisory levels by noon.

The swell may rise on Saturday to possibly warning levels, and the advisory could include the Big Island.

On Friday, surf may reach 20 to 24 feet on north-facing shores and 15 to 20 feet on west shores.

Beachgoers and boaters should exercise caution and to expect strong breaking waves and shorebreak, as well as strong longshore and rip currents.