Father, son missing off NSW south coast after fishing trip

Two rock fishermen have gone missing off the New South Wales coast, sparking a marine search.

The father and son, aged 47 and 17, reportedly did not return home from a fishing trip at Storm Bay in Kiama, in the state's south.

The men were last heard from at 5.20pm yesterday and were expected home by midnight, NSW Police said.

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Police were called at 3am today, when the men were reported missing.

Police have located their car and fishing gear near the fishing site.

Marine Rescue NSW joined the search of the Kiama Blowhole coastal contour at 7.30am today, Inspector Stuart Massey said.

"The Marine Rescue Port Kembla crew has just joined the search under the direction of NSW Police Marine Area Command," Massey said.

"Sea conditions off Kiama are fair this morning."

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Lake Illawarra Police District Superintendent Craig Ireland said the search team are working off the assumption that the pair had entered the water, although no one saw them fall in.

They were not wearing life jackets, Ireland also said.

It's understood it was a high tide last night, with witnesses telling police there was a large swell.

The pair are from Liverpool in Sydney's southwest and have experience fishing at Kiama before.

The search will continue until sunset tonight, and will most likely continue tomorrow.

More to come.