A man has died after he plunged from a cliff in Sydney’s south while whale watching.

Emergency services were called to Cape Solander in Kurnell just before 1.30pm today after witnesses reported a man in his 30s had fallen from a rock ledge.

The ledge is right near a whale watching platform and is a popular spot for tourists to see humpack whales do their yearly migration in June and July.

It’s believed the man was posing for photographs with his boyfriend moments before slipping and plunging into the waters below.

He was found around an hour and a half later face down and unconscious in the water, “directly below the whale watching platform”, a spokesman for Westpac Life Saver Rescue Helicopter said.

Emergency services launched an extensive search for the man, using a helicopter and a number of jetskis to find him.

The helicopter winched the man up to the clifftop carpark where he was given CPR by paramedics but he was unable to be revived.

NSW Police do not believe the man’s death was suspicious and are yet to identify the man.

The Cape Solander cliffs, located in the Kamay Botany Bay National Park, are one of the best places to catch a glimpse of humpack whales in the winter months as they migrate north to warmer waters.

National Parks NSW calls the Cape “an unbeatable lookout during whale watching season”.

“If you’re lucky you won’t even need to look far — whales have been known to swim as close as 200m from the coast,” a description on the National Parks site reads.

A report is being prepared for the coroner.