A surfer drowned today after the leash on his board became tangled on a Queens jetty and storm-churned surf pounded him underwater, police said.

The man, who has not yet been named but was 36, was only feet off the Rockaways shore when firefighters reached him at 9.25 a.m.

He suffered a heart attack and was dead on arrival at Peninsula General Hospital.

He was knocked off his board by waves that were nearly eight feet high, churned up by the remnants of Hurricane Ida, which is roaring up the East Coast.

Cops said the leash that tethers a board to a surfers ankle had gotten snagged on a jetty off 96th Street, leaving the man unable to escape the crashing waves.

Its the seventh death in the hazardous Rockaways waters this year.