The transport agency Waka Kotahi has issued a strong wind warning for the Auckland Harbour Bridge and lines company Vector is warning people could be without power for days if the weather gets as bad as predicted.

It's forecast Auckland could experience about 120 to 130 gusts an hour between 10am and 4pm.

Waka Kotahi expects the Auckland Harbour Bridge will be closed for several hours, with winds expected to reach around 130 kilometres an hour later this morning.

The transport agency said last night that its bridge safety protocols require the closure of the bridge to traffic when wind gusts reach 90 kilometres an hour.

Auckland Emergency Management group controller Mace Ward said residents needed to check the weather conditions before travelling today.

"If they're driving anywhere, just check the roads first. Waka Kotahi are warning about high gusts on Auckland Harbour Bridge and the roads."

Should the Harbour Bridge be closed, access to the city will be available via the Western Ring Route.