The Whangārei Harbour Marine Reserve protects 253.7 hectares of coastal habitat in two distinct locations: the Waikaraka mangrove and mudflat area about 8 kilometres from Whangārei, and the reef and sandy seabed around Motukaroro/Passage Island at the harbour mouth, about 30 kilometres from the city. The two areas protect very different habitats and attract different kinds of visitors — Waikaraka for birdwatching, Motukaroro for diving and snorkelling. Both are free to visit and managed by DOC.
Practical Information
| Waikaraka access | 350 Whangarei Heads Road, Waikaraka (8 km from city) |
| Motukaroro access | Reotahi Road, McLeod Bay → Beach Road to car park (30 km from city) |
| Total area | 253.7 hectares across both sections |
| Entry | Free |
| Managed by | Department of Conservation |
| Fishing/collecting | Not permitted — marine reserve rules apply throughout |
Waikaraka — Mangroves and Birdlife
The Waikaraka section covers 227.5 hectares of mangrove forest, intertidal mudflats, and subtidal channel edge. The mangrove forest here is one of New Zealand’s richest, providing habitat for over 80 species of birds — including shags, pied stilts, royal spoonbills, banded rail, kingfishers, and herons. The mudflats exposed at low tide are highly productive feeding grounds, and the variety of wading bird species visible from the reserve’s edge is exceptional.
Access is from a small council reserve off Whangarei Heads Road at Waikaraka. There is a car park and grassed picnic area near 350 Whangarei Heads Road. The experience here is primarily about birdwatching and observing the mangrove ecosystem rather than walking — the terrain doesn’t lend itself to tracks through the tidal zone.
Motukaroro/Passage Island — Reef, Diving and Snorkelling
Motukaroro (Passage Island) sits at the mouth of Whangārei Harbour, protecting 26.2 hectares of rocky reef, sandy seabed, and the island itself where shags and herons nest. The island’s western point features a large colony of filter feeders — anemones and sponges — in brilliant colours that make it a notable dive site. Swimming, snorkelling, kayaking, and diving are all possible here.
Be aware that strong tidal currents and back eddies occur around Motukaroro. The site is more suitable for experienced divers and swimmers who are comfortable in moving water. Access is via Beach Road off Reotahi Road at McLeod Bay.
Marine Reserve Rules
As a DOC-gazetted marine reserve, Whangārei Harbour Marine Reserve is a no-take zone throughout both sections. Fishing, collecting shellfish, disturbing wildlife, and removing any organisms or material are all prohibited. Anchoring is permitted in designated areas only — check with DOC for current conditions before boating.
What visitors say
“The Reotahi end (Motukaroro) is excellent for snorkelling — the filter feeders on the western point are spectacular. Allow time to get there and check tides before you go.” — TripAdvisor visitor
“Waikaraka is the place to go for birds — spoonbills, herons, stilts. Get there at low tide and bring binoculars.” — visitor review
Where to Learn More
Useful links
DOC — Whangārei Harbour Marine Reserve — official information including rules, maps, and wildlife
Environmental Marine Reserves — Whangārei Harbour — marine reserve advocacy and ecological background
Frequently Asked Questions
Can I fish in the Whangārei Harbour Marine Reserve?
No. The entire reserve — both the Waikaraka and Motukaroro sections — is a no-take zone. Fishing and collecting are prohibited throughout.
Is diving allowed at Motukaroro?
Yes. Diving and snorkelling are permitted — the reserve exists to protect marine life, not restrict access. However, you must not collect or disturb anything. Strong currents around the island make it more suitable for experienced divers.
What is the best time to visit Waikaraka for birds?
Low tide is best — the mudflats are exposed and wading birds are feeding. Visit in the morning when light conditions are better for spotting and photography. Summer months see the greatest diversity of species.
How far is the marine reserve from Whangarei city?
Waikaraka is about 8 kilometres from central Whangārei via Whangarei Heads Road. Motukaroro/Passage Island is about 30 kilometres away, accessed via McLeod Bay at the Whangarei Heads.
Is there a fee to visit?
No. Both sections of the marine reserve are free to visit.
Are there facilities at the reserves?
At Waikaraka there is a car park and picnic area. At Motukaroro/Beach Road there is a car park. Facilities are basic — bring your own water and food.
The Whangārei Harbour Marine Reserve is part of a broader network of protected areas in the district — see the Whangārei parks and reserves guide for more. The Reotahi Coastal Walkway runs alongside the Motukaroro section and is worth combining with a visit.