Auckland motorists have been warned to be careful as the city gets hammered with hail and heavy rain.

Video of hail pelting down on a car as it crosses the Harbour Bridge has been released by 1News.

Other Aucklanders posted to social media showing a smattering of hail in the backyard before it melted on the ground.

More 1News footage shows Aucklanders struggling with massive umbrellas that were blown down in the city centre.