Omaha Beach will become the seventh event in the Banana Boat New Zealand Ocean Swim Series on December 15.
The swim series includes swims from Russell to Nelson.
Omaha was added for the first time this year.
At Omaha, there will be six race lengths from 100m up to 3.5km.
Competitors will begin their swim in the Omaha estuary and finish at the beach.
The first race begins at 11.40am and prize giving will be at 1.05pm and 4.05pm.
Early bird pricing ranges from $22.50 to $72.50.