WHEN.SURF FORECAST Oahu North Shore

Small NW surf builds through the morning, mostly waist with occasional chest-high sets at the better reefs and a touch more size toward the western end from the WNW angle. Trade-swell lump keeps it a bit choppy early, and the minus low tide near 9am may leave shallow spots sketchy.

Late morning into early afternoon looks waist to stomach at the average peaks with occasional shoulder-high sets where the better lines focus. The swell stays a little lully and mixed with short-period trade energy, so expect bumpier faces than clean walls. Rising tide helps some spots after the morning low.

The afternoon holds similar surf, around stomach-high at average spots with occasional shoulder-high sets, still a touch better toward the western end. Easterly trades gain a bit more offshore bend, but leftover short-period lump keeps conditions textured rather than clean. A higher evening tide will soften the smaller waves late.

Monday morning should show a more noticeable WNW pulse, with chest-high surf common and occasional head-high sets at the better reefs, especially toward the western end. Easterly wind is more favorable than Sunday, though not fully glassy. Near-low tide through midmorning should help the smaller inside sections stand up.

The new WNW swell should hold through the afternoon with chest-high surf common and occasional head-high sets at the better peaks. Easterly to ESE wind stays fairly favorable, leaving some texture but cleaner faces than Sunday. Rising tide toward evening will slow some smaller sections and soften shoulders late day.