The NZ Transport Agency says State Highway 16 between Kaukapakapa and Wellsford is closed in both directions due to heavy flooding near West Coast Road.
Southbound traffic is currently being turned around.
Other potential diversion routes including Woodcocks Road are also affected by flooding.
Motorists are advised to delay their travel and avoid the area if possible.
The flooded area
For the latest highway information visit the Transport Agency’s website(external link) or sign up to www.onthemove.govt.nz(external link) for up-to-date information on what is happening on the route you plan to travel; freephone 0800 4 HIGHWAYS for national and regional travel updates.