A Hamilton man has died at a Northland campground after being electrocuted when he tried to cut the power of a noisy caravan.

The body of the 30-year-old man was found about 3am yesterday at Whangaruru Beachfront Camp, 50km north of Whangarei, police spokeswoman Sarah Kennett said.

She said the man had been staying at the camp with a friend and his friend's father when he became frustrated with noise coming from a nearby caravan.

He had left his own campsite site at about 12.30am to deal with the issue.

"Allegedly he was frustrated about a noisy stereo and he would have gone to disconnect the power," Ms Kennett said.

It appeared he had attempted to cut the power cord to the caravan with pliers.

He was found around 3am by the occupants of the caravan, she said.

It was unclear how many volts the power cord carried, but it was thought to be around 240 volts.

His death has been referred to the coroner.

A spokeswoman for the campground declined to comment about the death.

"It's all been ticked off by police," she said.