BONNY DOON -- A 28-year-old Milpitas woman and a 30-year-old San Francisco woman died Sunday after they were swept into the ocean off Bonny Doon Beach north of Santa Cruz.

Leoannie Binas-Semana, of San Francisco, and Aylene Semana, of Milpitas, were fishing from a rocky cliff with their husbands about 3:30 p.m., said Santa Cruz County sheriff's Sgt. Patrick Dimick.

The husbands are brothers, authorities said. The weather was sunny and windy, and the tide was rising to a high of 5.2 feet about 5:45 p.m.

As they fished from dry rocks, a wave knocked the two women into the ocean, said State Parks Public Safety Superintendent Mike McMenamy.

The men jumped into the water to try to save them, and a State Parks ranger and a California Fish and Wildlife warden spotted the rescue attempt from the beach. Authorities have not said whether the women could swim or what they were wearing.

"The husbands were unable to rescue their wives from the treacherous conditions," Dimick said.

The ranger and warden then coordinated a rescue effort that eventually included Cal Fire, American Medical Response, a State Parks rescue swimmer, a State Parks jet ski driver, a Santa Cruz Harbor Patrol boat and a U.S. Coast Guard helicopter.

The State Parks swimmer helped swim one woman to a Harbor Patrol boat waiting outside the surf line. The State Parks jet ski driver picked up the other woman and took her to the same boat. Authorities started lifesaving efforts. The boat took the women to the Santa Cruz Small Craft Harbor where they were declared dead, authorities said.

After the rescue, one of the husbands was stranded on the rocks. Coast Guard helicopter crew members used a basket to lift him to safety. Neither of the men were injured.

Authorities have not determined the cause of death for either of the women. Autopsies have not been performed as of noon Monday. Deputies do not suspect foul play.

Follow Sentinel reporter Stephen Baxter at Twitter.com/sbaxter_sc.