Auckland's beaches have been widely affected by damage to a sewer pipe in St Georges Bay - in Parnell.

Wastewater's confirmed to be shooting into Waitemata Harbour at two sites, shutting numerous surrounding beaches, as well as in the inner harbour and East Coast Bays.

Watercare says crews have had plenty of practice working with pipes after this year's ferocious storms.

Chief Operations Officer Mark Bourne says it's not clear yet when repairs will be finished.

"We'll be working around the clock- we worked though until 1am last night at the site, protecting the site."

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