Current NNW (340-350) swell stubbornly hovers near its peak values at press time this afternoon. Surf numbers have therefore been nudged upward for N and W facing shores to accommodate the most recent observations. This swell will fade heading into Friday. A deep low is expected to develop N of the islands Friday into Saturday. This low will generate a large short to medium period NNE (010-020 degree) swell late this weekend that will likely exceed the High Surf Advisory threshold for N facing shores. This fetch will also favor harbor surges in N facing harbors such as Kahului and Hilo on Sunday.

Surf remains small for E shores through the near term, eventually catching some of the aforementioned NNE swell. Short period chop and NEly fresh swell emanating from upstream trades will bring elevated surf to E shores behind the cold front and continuing into next week. S shores remain small through the remainder of this week. A small long period SSW swell will boost surf Friday into the weekend.