High Surf Advisory issued December 21 at 3:51AM HST until December 23 at 6:00AM HST by NWS Honolulu HI

…HIGH SURF WARNING FOR NORTH AND WEST FACING SHORES OF NIIHAU
KAUAI OAHU MOLOKAI AND NORTH FACING SHORES OF MAUI…
…HIGH SURF WARNING FOR WEST FACING SHORES OF THE BIG ISLAND…
…HIGH SURF ADVISORY FOR NORTH FACING SHORES OF THE BIG
ISLAND…

.An extended period of hazardous surf and beach conditions will
persist into early next week along exposed north and west facing
shores due to overlapping, winter-caliber north-northwest swells
(315-330 degrees). The largest swell in the series is expected
to arrive tonight, rapidly rise early Sunday, peak through the
day Sunday, and then gradually ease Sunday night into early next
week. Surf associated with this swell will remain well above
warning levels through the weekend, then return to advisory levels
for exposed north and west facing shores around Tuesday of next
week.

* WHAT…Surf of 12 to 16 feet.

* WHERE…North facing shores of the Big Island.

* WHEN…Until 6 AM HST Monday.

* IMPACTS…Moderate. Strong breaking waves and strong currents
will make swimming dangerous.