Several Windward O'ahu beaches are expected to remain closed through the Easter weekend as a result of contaminated water from sewage spills, a state Health Department official said.

Warning signs remained posted from Waimanalo Beach Park through Bellows Beach Park and Wailea Point, as well as from Kane'ohe Beach Park through Kokokahi, said Kurt Tsue, a Department of Health spokesman.

Signs are up near the mouth of Ka'elepulu Stream but not at Kailua Beach Park itself.

The city Parks Department announced it was shutting down camp sites at Bellows Field Beach Park for the weekend.

The Health Department also continued to leave signs posted along all sections of the Ala Wai Canal, Ala Wai Boat Harbor and Ala Wai Channel.

No postings remain on other islands, Tsue said.

Rough and large surf of 6 to 8 feet was continuing along east-facing shores of all islands, the National Weather Service said.

Strong trade winds over and to the east of the Islands are generating large and rough seas that are creating bigger surf, forecasters said.

A high-surf advisory for east-facing shores was to remain in effect until 2 p.m. today.

Beachgoers were urged to stay out of the water and away from shorebreak to avoid hazardous waves and strong rip currents.