Surfers at these shores can expect breakers of 10 to 15 feet, said meteorologist Bob Burke, adding that waves of 4 to 7 feet are forecast for O'ahu's east shores.

A second surf advisory was in effect this morning for the northeast shores of Maui and the Big Island, with waves of 6 to 10 feet, but Burke said this advisory might be canceled later today.

The northwest waves were produced by gale-force winds far northwest of the Islands four days ago, Burke said. The northeast swells resulted from a low-pressure gale area to the northeast and a high-pressure area to the north, he added; this combined to produce high winds over the weekend and today's high surf.

Winds should decline over the next two nights, said lead forecaster Roy Matsuda, which means that low temperatures, still in the 60s, won't feel so cold. Thereafter, low temperatures will begin reaching into the 70s.