Qld man swept from causeway still missing

A man remains missing a day after a car was swept from the causeway of a fast-flowing river in far north Queensland.

Two Cape York men were in the vehicle that was washed downstream from the flooded crossing at Archer River, north of Coen, on Saturday afternoon.

Only one made it to the river bank.

A search by police and a helicopter has so far failed to find the missing man.

"From what I understand, the river is quite fast flowing," a Queensland police spokeswoman told AAP.

"It's dangerous conditions."