Located in the historical town of Kawaihae, and tucked under the northwest corner of the Big Island, is Kawaihae Harbor -- a fun surf spot during the winter and summer months that offers both rights and lefts. WNW to N swells run down along the northwest Big Island coast and hit the breakwater at Kawaihae, producing running right-handers. The left empties out into the boat channel, so it's not quite as good as the right.
Source: Kawaihae Breakwater Surf Guide