A drenching overnight will see widespread disruption today for those in the Coromandel region.

Civil Defence is warning campers across the Coromandel Peninsula, that flooding, slips and road closures could leave them isolated.

Heavy rain warnings are in place for the region until late tonight, and roads near Whitianga and further north have already been shut.

Thames-Coromandel mayor Len Salt says more than 150 millimetres has fallen in the ranges, with slips and road closures expected to continue.

"We'd really like people to stay safe, find somewhere warm and dry, don't try and travel, and just keep themselves safe during the day."

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