Residents in New Zealand's largest city of Auckland and the surrounding area are being told to brace for more heavy rain, flooding and gale-force winds, and some homes are being evacuated, as cyclone Gabrielle nears the country's coast.

Gabrielle is currently sitting 200 km northeast of Auckland and is forecast to move close to the east coast over the next 24 hours.

"We expect the impacts of cyclone Gabrielle to get, unfortunately, worse before they get better," said Rachel Kelleher, Deputy Controller Auckland Emergency Management on Monday.