Surf on O'ahu's north- and west-facing shores was expected to diminish a bit overnight and build up again tomorrow, the National Weather Service said.

The surf on O'ahu today is expected to reach 8 to 10 feet along north-facing shores and 3 to 5 feet along west-facing shores.

Surf along east -facing shores will be 1 to 3 feet, while east-facing shores should see surf of 2 feet or less. t

Outlook through Sunday, Jan. 25: Forerunners from a new large northwest swell are expected to arrive by Tuesday afternoon.

Strong north winds will produce stormy ocean conditions tonight and Wednesday morning, with surf heights approaching the high surf warning thresholds along north- and west-facing shores.

This swell will gradually diminish Thursday and Friday. Another reinforcing northwest swell arriving late Friday may boost surf heights near high surf advisory levels during the weekend.