High Surf Advisory Extended Today
Alerts (as of 1:00 a.m.)
A High Surf Advisory is posted for the north and west shore of the Big Island through 6 p.m. Thursday.
A Small Craft Advisory is in effect through 6 a.m. Thursday for windward Big Island waters and the Alenuihaha channel.
A Wind Advisory is posted for the summits of Mauna Kea and Mauna Loa through 6 a.m. Thursday for west winds from 40 to 50 mph, gusting to 55 mph.
A Marine Weather Statement has been issued for a very large northwest swell producing harbor surges in Honokohau Harbor and large breaking waves at the harbor entrance.
**Click directly on the images below to make them larger. Charts include: Big Island projected winds, tides, swell direction & period and expected wave heights.**
Hilo side: Wave heights for spots exposed to the large swell are expected to be head high to bit overhead at the best breaks. Spots without direct exposure will be smaller.
Kona side: Wave heights are expected to be waist/head high today with some spots getting slightly overhead on the sets.
South: Wave heights are expected to be waist/head high with the best spots getting bigger on the sets.
Northwest swell holds into Thursday morning and will fade through Saturday. The Big Island will again be heavily shadowed and won’t show the size as much as the other islands. Another swell is due in Saturday, peaking Sunday afternoon.
A couple of small south-southwest swells will filter in this week at waist high or less. A fun size bump could fill in around March 7 – 9 for southern exposures. Tummy to chest high sets are possible with this swell.
Keep in mind, surf heights are measured on the face of the wave from trough to crest. Heights vary from beach to beach, and at the same beach, from break to break.