A body has been found in Wattle Bay, Manukau Heads, police say.

The body was found by a fisherman and police alerted just after 5pm.

Police are still on their way to the scene and it was too early to say if the body was that of a 52-year-old fisherman who went missing a week ago, a spokeswoman said.

"However, police have notified his family of this development.

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The formal identification process will begin after the body is removed tonight, she said.

Another update will be provided tomorrow.

The 52-year-old has been missing since his dingy capsized in Manukau Harbour on April 19.

The man was fishing with his eight-year-old daughter, who was pulled "shaking and cold" from Manukau Harbour after at least three hours in the water.

She was released from Middlemore Hospital the following day.