Noumea and the southwest lagoon

For a mixed dive, snorkeling and city trip, September to November is a useful first choice because the regional climate is generally drier and outdoor days can be comfortable. Scuba divers may also consider April through August, when tourism guidance describes clearer cool-season water, though water can approach 22°C and boats still face wind and tidal limits. December through March is warmer but more susceptible to heavy rain and tropical disturbances. Each planned boat remains subject to the actual weather, pass currents, permits and an operator booking. Climate | Diving conditions

The main evidence-backed scuba anchors are the Dieppoise wreck, situated in the tourism guide between Boulari Pass and Amedee, and the Boulari and Dumbea tidal passages with drift-diving opportunities. The Dieppoise is listed around 26 m; that depth does not automatically make its wreck environment beginner-safe. Noumea-based operators such as Iatok Diving Paradise, Odyssey Diving and Abyss Plongee advertise local boat trips and courses. Ask each company which exact site is accessible, whether full gear hire is included, how currents are assessed and whether a supervised introduction is appropriate for your certification. Sites | Operator

Tenia is included as a Boulouparis day-boat subregion rather than a routine Noumea ferry stop. Drive to your prearranged departure point, usually Port Ouenghi for Jackaroo Surf Camp, which advertises a boat crossing of about 25 minutes. The earlier Bouts d'Brousse Bourake listing carried a temporary-closure flag and is now unavailable. Another local ticket listing also needs current confirmation; neither is proof of a running boat. Ask for the exact pier, return time, life jackets, bad-weather refund, landing restrictions and whether food and gear are included. Do not plan to reach Tenia from Anse Vata without a specifically confirmed charter. Taxi boat | Closure warning

The published Duck Island underwater trail is a recognizable Noumea snorkel attraction, but the main tourism listings for the island experience and a taxi-boat service explicitly state temporarily closed. Descriptions of all-year operations or a documented trail do not override that flag. Conversely, a closed commercial listing does not establish a blanket legal prohibition on access to the geographic island. Verify Province Sud island status separately, then confirm a legitimate running boat and local swimming conditions. Until that chain is complete, do not sell or recommend it as a confirmed current excursion. Trail | Transport status | Islet rules

Yes, an Amedee Lighthouse day excursion is marketed for mixed groups. The Mary D offer includes the sea crossing, island time, meals and a glass-bottom-boat trip that does not require immersion; the lighthouse climb is available for an additional published on-site fee. Guests can choose shore time instead of snorkeling if they are not confident swimmers, while observing landing and marine rules. This package is not evidence of a certified scuba dive and does not imply that other boats provide dive instructors. Confirm opening hours, seasickness needs, accessibility and the actual pickup point directly before purchase. Amedee package

Blue Caledonia Freediving School publishes introductory sessions and AIDA 1 and 2 training from Noumea, with an advertised minimum age of 16. This verifies a potential instructor-led route for beginners, not an open public deep-water training site, an official freedive competition program or a promised maximum depth. Ask the instructor about course dates, supervision ratios, a safety diver, buoy and line, medical screening, suitable wetsuits and alternative locations when currents or weather change. Never attempt solo breath-hold practice or assume the scuba drift passes are appropriate freediving grounds. School listing

Not automatically. Boulari and Dumbea are tidal passages used for drift diving, and the Dieppoise is a wreck at roughly 26 m. Even when an individual diver has a certification covering a comparable depth, wreck orientation, current, boat traffic and the possibility of overhead exposure add hazards. The responsible local guide must decide whether the actual planned site suits the diver's training and recent experience. New divers can instead ask operators for an explicit beginner reef or instructor-led introduction, with a documented route, maximum planned depth, gas plan and emergency oxygen on the vessel. Official sites | Operator training

There is no verified single universal paid marine park ticket in the reviewed evidence for the whole circuit. Instead, Province Sud publishes site-specific marine conservation categories and restrictions on entry, landing, fishing, anchoring and wildlife disturbance. Amedee and Tenia cannot be treated identically to strict no-entry sectors or nesting-period protected islets. A package price charged by a skipper is not a legal access permit and cannot override reserved waters or customary shoreline rights. Before each excursion, check the authoritative zone map, the island-alert service, tour operator permissions and any relevant local fee or exemption. Regulations | Live island notices

There is no blanket safety guarantee for the lagoon. Noumea has shark-risk regulations, and its municipality identifies supervised netted swimming zones at Baie des Citrons and the Chateau Royal/Le Meridien area, while warning that other waters are used at people's own risk. The city temporarily restricted some activities in April 2026; those historic dates should not be mistaken for a permanent ban or proof that any current area is open. For any swim, check official signs, fresh-water quality warnings, marine weather, jellyfish notices and your skipper's advice. Netted areas reduce but never eliminate risk. Rules | 2026 bulletin

For an immediate medical emergency call SAMU 15, and use 16 or marine VHF channel 16 for an at-sea rescue alert as appropriate. CHT Gaston-Bourret in the Noumea area is the principal hospital. Hyperbaric clinical capacity cannot be promised on any specific date: a dive federation notice documented a 2024 interruption and resumption, while newer tourism and overseas travel sources describe providers differently. Prior to booking, confirm oxygen, boat communications, evacuation time, chamber availability and the receiving hospital with the skipper and SAMU. Ensure insurance covers decompression treatment and possible overseas transfer. Hospital emergency | Historical notice

Published 2026 examples include roughly 10,500 to 12,000 XPF for certain two-dive Noumea outings before some rental or supervision extras, 15,500 XPF for a Mary D adult Amedee excursion, and 300 XPF additional adult lighthouse admission. Blue Caledonia lists 12,500 XPF for a discovery freedive session. Prices can change, availability varies by day and most references are advertisements rather than confirmed tickets. Compare what is included: tanks, guides, meals, return transport, gear and refunds. Airfare, lodging and a separate vehicle for Boulouparis can outweigh the water-activity price. Dive prices | Amedee prices

Noumea offers several weather alternatives: Aquarium des Lagons for reef ecology, Tjibaou Cultural Centre for Kanak cultural interpretation, the Maritime Museum for local seafaring history, and bay-side dining or galleries. In acceptable land weather, the Ouen Toro walking trails have lagoon viewpoints, but the trail listing warns that drinking water is not available along the route. A Boulouparis road outing can include Ouenghi Bridge, although driving conditions still need checking. Avoid presenting protected swimming as the default substitute after shark or cyclone warnings; select dry, land-based activities instead. Aquarium | Centre

Fly into Noumea La Tontouta (NOU), the principal international airport, and prebook a transfer, taxi or rental car for the road trip into Noumea. The journey is commonly described at about 45 minutes in ordinary conditions. In town, some museums, shops and waterfront districts are reached using Taneo buses or taxis. For Tenia, a dedicated road trip to the booked Port Ouenghi or Bourake wharf is needed before the water taxi; these are not ordinary downtown Noumea ferry stops. Allow weather and traffic flexibility and do not rely on an unconfirmed local operator. Airport | Boat

Tourism sources describe sea turtles around visitor islets and potential rays and sharks around dive passages; none is a guaranteed encounter. Seasonal guides mention humpbacks in the wider New Caledonia lagoon from around mid-June to mid-September, not a verified whale-swimming product within this approved Noumea and Tenia circuit. A snorkeling excursion does not authorize in-water pursuit, and a sighting never proves the site is otherwise safe. Respect wildlife approach regulations, never feed sharks or touch turtles, and use an operator who follows marine-mammal conservation guidance. Turtle context | Whale season

No. This approved visitor itinerary is chiefly based on land stays and local day boats, with Noumea as the principal activity base and a separate road-to-taxi-boat excursion from Boulouparis to Tenia. Enjoy Diving advertises a multi-day boat with cabins, but that business listing alone does not show that a common, regularly departing overnight route covers exactly this approved southwest circuit. Do not classify the whole destination as liveaboard-focused because trips exist elsewhere in New Caledonia. A reasonable itinerary uses individually confirmed dive/snorkel departures and preserves spare days for sea-state changes and cancellations. Overnight product context | Tenia