Road traffic should use the Dent St, Hatea Drive, Riverside Drive intersection during the closure.
The Kōtuitui Whitinga section of the Hatea Loop walkway will also be closed, so walkers are being asked to make alternative plans during this period.
Signs will be put along the loop to warn people about the closure.
The bridge will be manned during these drills to allow boats to pass, but there may be a delay of up to an hour.
The council recommends that any skippers looking at coming through the bridges at that time, contact bridge control in advance of approaching the bridges.