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Third Cave
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The Third Cave (Grotte de la Troisième), located near Dumbea, is one of the most spectacular karst formations in New Caledonia. This cave is famous for its crystal-clear underground lake, which maintains a constant temperature of approximately 22 degrees Celsius throughout the year. Accessing the interior requires specialized equipment and advanced technical training, making it a premier destination for cave divers from around the world. The submerged galleries offer a fascinating landscape of stalactites and stalagmites that have formed over thousands of years. Although the entrance may appear modest, the cave system extends considerably underground, providing researchers with valuable data about the island's hydrogeology. For casual visitors, the cave represents a place of rugged natural beauty, but the exploration of the lake remains reserved exclusively for professionals.
- Location: New Caledonia
- Nearby: Ouémo Point (5 km)
Best time to visit & climate
The most pleasant time to visit is Aug–Oct.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | 26 | 27 | 26 | 25 | 24 | 22 | 21 | 21 | 21 | 23 | 24 | 25 |
| Rain mm | 109 | 99 | 161 | 104 | 94 | 80 | 68 | 58 | 42 | 41 | 65 | 78 |
📋 Practical info
Visiting
The Third Cave is a popular spot for cave divers and requires specialized equipment. The surface area can be visited by hikers, but the underground lake is only accessible to divers.
Typical hours
Access to the cave is generally possible during daylight hours, exact timing depends on weather and local conditions. Divers should inquire in advance about tides and visibility.
Photography
Photography at the surface is straightforward. Underwater shots require waterproof cameras and special lighting; flash may disturb the sensitive cave fauna.
Time needed
A surface visit with hiking takes about one hour. For a dive in the underground lake, allow at least two hours including preparation.
Combine with
Combine the trip with a visit to nearby Nouméa beaches. The islets Îlot Canard and Îlot Maître are also easily reachable by boat.
Getting there
The cave is about 30 kilometers from Nouméa, accessible by car or taxi. The final stretch may require hiking; sturdy footwear is recommended.
Insider tip
Rent gear and a guide on site, especially if you plan to dive. Check the current weather forecast as the cave may become inaccessible during rain.
Geography
Facts
- Located in the municipality of Païta
- Features a subterranean freshwater lake
- Formed within karst limestone deposits
- Home to several colonies of bats
- Accessible via a marked hiking trail
- Average water temperature is about 20-22°C
Explore nearby
Notable places around
Route planner — Car & Motorhome
Where do you start? We build the route here, with stops and country notes along the way.
Vehicle
Only stops with (optional):
© OpenStreetMap contributors · OpenRouteService
Sights nearby
Frequently asked questions
Is a guide mandatory?
Yes, to ensure safety and preservation.
What is there to see?
Impressive dripstone formations.
How are the lighting conditions?
Very dark, a flashlight is necessary.
Is it cool in the grotto?
Yes, the temperature is significantly lower than outside.
Do you have to book?
A reservation is recommended to secure spots.
Third Cave: where is it located?
Third Cave is located in New Caledonia.
Third Cave: when is the best time to visit?
The most pleasant time to visit is Aug, Oct.
Third Cave: why is it worth visiting?
The Third Cave (Grotte de la Troisième), located near Dumbea, is one of the most spectacular karst formations in New Caledonia.
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