An out-of-season south swell has reached Hawaii, resulting in a high surf advisory for the south-facing shores of all islands.

Surf along the south-facing shores on O'ahu is expected to reach 6 to 10 feet, with locally higher sets, throughout the day, the National Weather Service said.

Surf along north- and east-facing shores will be 3 to 5 feet today, while surf along west facing shores is expected to reach 4 to 8 feet, with locally higher sets.

The long-lived northeast swell is finally diminishing. A solid south swell will keep surf above advisory levels along south-facing shores through Saturday before gradually decreasing. A small northwest swell will build Friday, peak near moderate levels over the weekend, and then diminish. No other significant swells are expected.