The body of Stephanie Simpson, 32, who had not been seen since she went for a hike last weekend, was found in an area called Pyke Creek, West Coast Search and Rescue sergeant Mark Kirkwood said in a statement. Police said the search earlier recovered a pack and a pair of boots, which they believe were Simpson's.
Flash floods and torrential rain hit the South Island last week, leaving several hundred tourists stranded for days and forcing many residents from their homes. It was not clear if Simpson's hike at the Mount Aspiring National Park, home of one of New Zealand's highest peaks, was affected by the rain.
Thousands of hikers visit New Zealand every year to explore its mountains and wildlife.