A woman has been rushed to hospital after a shark attack on the New South Wales south coast on Saturday morning.

The woman, believed to be in her 60s, was injured in an apparent attack off the main beach at Merimbula about 7am.

About 30 km of coastline has been closed for the next 24 hours as investigators search for the shark responsible.

Emergency services were called to the beach and paramedics treated the woman for bites to her hip and thigh, according to Surf Life Saving NSW.

She has been taken to hospital in a stable condition.

“Beaches from Wallagoot Lake down to Pambula are closed for 24 hours after a woman in her 60s was bitten on the hip and thigh by a shark while swimming at Main Beach Merimbula,” Surf Life Saving NSW said on Twitter.

More to come.