Lake Mapourika’s Warm Water: A West Coast Summer Favourite
When you hear the words glacial lake, you might expect icy cold water — but Lake Mapourika is full of surprises. Formed over 14,000 years ago by the retreating Franz Josef Glacier, this kettle lake is no longer fed by glacial melt. Instead, it’s topped up by pristine rainforest streams and fresh West Coast rainfall, giving it a much warmer personality.
Lake Mapourika’s dark, tea-coloured water comes from natural tannins released by the surrounding native rainforest. This blackwater acts like a solar blanket, absorbing the sun’s heat and making the lake surprisingly warm! Often reaching up to 25°C in summer. It’s a perfect setting for swimming, kayaking, and relaxed days on the water.
Doesn’t this look fun?
Summertime: Kayaking and Swimming
In the warmer months, kayaking trips on Lake Mapourika are even more magical. Guests love diving in mid-tour for a refreshing swim or leaping off the jetty after a paddle around the bay. On our Kayak Classic or Kayak & Walk tours, there’s plenty of time to enjoy the water — and your guide will be there to snap the perfect action shot. The Sunset kayak tour is a favourite for evening swims beneath a golden sky and snow-capped mountain views.
Locals’ Favourite: MacDonalds Creek
If you’re after a more secluded experience, head to the hidden gem on the MacDonalds Creek side of Lake Mapourika. This peaceful spot is a locals’ favourite for lakeside camping and swimming, offering sheltered bays and easy access to the warm water. Whether you’re in a campervan or pitching a tent, it’s the perfect base for a relaxing summer escape.
Scenic Cruises and BBQ Evenings
Not into paddling? Join a Scenic Cruise for a relaxing way to explore the lake’s mirror-like reflections and learn about the area’s unique history and wildlife. Private cruise options are also available — perfect for families or small groups who want to bring a BBQ, enjoy a swim, and soak up the evening light on a quiet corner of the lake.
Lake Mapourika in summer is all about warm water, incredible views, and the simple pleasure of swimming in a rainforest-fringed lake beneath the Southern Alps. Whether you’re kayaking, camping, cruising, or just looking for a quiet swim, this is one glacial kettle lake that might just surprise you. It’s definitely a must-do stop on New Zealand’s West Coast!
