A Givealittle page set up to support the family of Hamish Rieger has raised more than $13,000 in 24 hours.

Hamish was swept off the rocks near the blowhole at Moturiki (Leisure) Island by a wave on Saturday evening.

The page had fundraised over $13,300 this morning.

Read more: 'We'll always remember Hamish'
Warning to stay out of Bay of Plenty surf

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On Saturday, just hours before his death, Hamish was out on patrol when he treated a 5-year-old child who had been stung by a bluebottle jellyfish.

Jamie Troughton, spokesman for the Rieger family, said Hamish did a full day's patrol on Saturday.

"He was out there all day looking after everyone else, which sums him up."

Mr Troughton said Hamish was a "great young kid" and an integral part of the Mount Maunganui Lifeguard Service.