Lake Wainamu is a freshwater lake tucked into the Waitākere Ranges just inland from Bethells Beach (Te Henga) in west Auckland. It offers something different from the exposed ocean beaches nearby: calm freshwater swimming with no tides, no surf, and no rips. The lake sits beneath a large sand dune that visitors can climb and slide down — sandboarding is one of the main draws. A walking track circles the lake through native bush and passes a small waterfall at the far end. As of early 2025, the full loop track remains closed due to storm damage, but the section from the Bethells Beach car park to the lake is still accessible.
Practical Information
| Location | Waitākere Ranges, near Bethells Beach (Te Henga), West Auckland |
| Water type | Freshwater — no tides, no surf |
| Access | Walk-in from Bethells Beach car park — approx 15–20 min each way |
| Track status | Loop track closed (storm damage, March 2025); access section to lake open |
| Sandboarding | Yes — bring a bodyboard; no hire on site |
| Lifeguards | None |
| Facilities | None at the lake — toilets at Bethells Beach car park |
| Entry | Free |
About Lake Wainamu
Lake Wainamu formed behind a large dune system that impounds a stream running from the Waitākere Ranges. The result is a calm, clear lake that is warm in summer and completely sheltered from ocean swell — a strong contrast to the surf and rips of nearby Te Henga beach. The lake has become a popular escape precisely because it is so calm compared to the dramatic and dangerous west coast beaches directly adjacent.
The walk from the Bethells Beach car park follows a gravel path through native bush. It is generally easy underfoot and takes around 15 to 20 minutes each way. The lake itself is visible before you reach it, with the large sand dune rising on the western side.
The Sand Dune and Sandboarding
The dune above Lake Wainamu is one of the largest accessible sand dunes in the Auckland region. Climbing it takes some effort — sand is hard going — but the views from the top across the lake and bush are rewarding. The slide down is fast. A bodyboard or similar flat surface makes a significant difference to the sandboarding experience; without one it is more of a scramble than a slide. There is no equipment hire at the lake, so bring what you want to use.
At the far end of the lake, the walking track reaches a small waterfall that cascades over natural terraces — a good destination for those who want to walk the full accessible section rather than just heading straight to the dune.
What Visitors Say
“Wainamu is the answer to Bethells when you have kids who can’t handle the ocean conditions out front. The lake is calm, you can actually let them swim without constant anxiety, and then the dune keeps everyone busy for an hour. A proper west Auckland day out.” — parent visitor account, Discover Aotearoa
Where to Learn More
- LAWA — Lake Wainamu: Land, Air, Water Aotearoa water quality and environmental data for the lake.
- AllTrails — Lake Wainamu Track: Track details, user reviews and current status updates.
- Discover Aotearoa — Lake Wainamu: First-person guide covering the walk, the dune and the lake.
FAQ
Is Lake Wainamu open for swimming?
Yes. The section of track from Bethells Beach car park to the lake is open. The full loop track has been closed since March 2025 due to storm damage — check AllTrails or Auckland Council for current status before visiting.
How do I get to Lake Wainamu?
Park at the Bethells Beach car park and follow the formed track inland toward the lake. The walk takes approximately 15 to 20 minutes each way on a gravel path.
Do I need to bring sandboarding equipment?
Yes — nothing is available for hire at the lake. A bodyboard or similar smooth flat surface is the most practical option for sliding down the dune. Without one, climbing the dune is still worthwhile for the view.
Is the lake freshwater?
Yes. Despite being just inland from the ocean, Lake Wainamu is a freshwater lake — no salt, no tides. It stays accessible for swimming regardless of ocean conditions.
Are there facilities at the lake?
No facilities at the lake itself. Toilets are available at the Bethells Beach car park — use them before heading to the lake.
Lake Wainamu is best paired with a visit to Bethells Beach / Te Henga — the two are right next to each other. For more freshwater and ocean swimming options around Auckland, see the guide to swimming in Auckland.