This is just a random extract of the long term Surfline forecast for the north shore. It's subscriber's material (which I'm not supposed to share), so I won't even indicate the dates, but - if it stays like that - that's three big NW swells in a row (scale is 8-16 feet). It's still winter in Hawaii.
4-5am significant buoy readings
No indication of southerly energy at the buoys, the Surfline forecast calls for 0.9f 16s. Below are the maps of Jan 20, 21 and 22 showing the distant and not particularly well oriented fetch where this low long period swell is coming from.
6.7ft @ 11s from 2° (N)
3.2ft @ 12s from 356° (N)
Wind map at noon shows light trades.
North Pacific shows a wide but not too strong WNW fetch, a small NNW one and a weakening E one.
Small southerly fetch in the South Pacific.
Morning sky shows that we're on the edge of a massive band of clouds. Forecasting clouds and rain is not my thing, so I will refrain.