Surf along north facing shores will gradually decline through the afternoon before a moderate, medium period north-northeast (010-030 degrees) swell is expected to fill in this evening, peak Christmas Day near High Surf Advisory levels, before declining Friday. Forerunners of this swell should start to reach offshore buoys through the morning hours with most of the energy to be focused over the eastern end of the state when it arrives. A Marine Weather Statement will likely be issued this afternoon for moderate harbor surges at Kahului and Hilo tonight through Christmas Day. A combination of the declining north northeast swell and a small long period west northwest swell will keep small surf through the weekend. West facing shores will see a tiny, moderate period west swell hold through the day. The next large long period northwest swell is expected over the first half of next week but stay tuned as the system develops northwest of the islands.

Rough and choppy surf along east facing shores will remain elevated today and gradually decline as trade winds ease slightly today. Seas remain elevated just below SCA criteria over windward coastal waters this morning but are expected to trend down through the day. With the building north-northeast swell expected this evening, exposed shorelines will see wrapping energy through Friday. Surf along south facing shores will remain very small through the week.