Ōkārito LagoonŌkārito Lagoon covers about 3,240 hectares and is the largest unmodified coastal wetland in New Zealand, sitting behind a sandbar on the West Coast. The shallow, tidal lagoon links to small rivers and is the outflow for nearby Lake Mapourika and Lake Wahapo, with the settlement of Ōkārito at its southern end. Vegetation around the lagoon forms a clear sequence from raupō and saltmarsh through mānuka and scrub into kahikatea swamp and mature rimu forest, a transition that has been lost in much of the region. Much of the lagoon is trackless and muddy and only reliably navigable along main channels, so visits often use boats or kayaks guided by local operators.
The lagoon is dynamic: earthquakes, river sediment and coastal spits continually alter water depth and salinity, shifting habitat between freshwater and brackish conditions. It supports extensive eelgrass meadows and healthy shellfish and fish populations, and over 70 bird species have been recorded here, making it important for both wildlife and traditional mahinga kai. Māori have used the area for food gathering and pounamu work for centuries, and the lagoon played a role in the 1860s gold rush when the nearby settlement grew into a busy port.
A small part of the old wharf and the reconstructed shed survive at Ōkārito and now functions as an information point; many visitors combine a short shore walk with boat trips to explore the lagoon, look for white herons and other birds, or to paddle into quieter creeks fringed by tall kahikatea and rimu.
- Rimu and kahikatea forest transition: Walk or paddle into channels where rainforest gives way to swamp and saltmarsh, showing a rare full sequence of West Coast vegetation types.
- Eelgrass beds and mudflats: Extensive eelgrass meadows and exposed mud at low tide provide habitat for whitebait, shellfish and shore birds.
- Birdlife and kōtuku: Look for many shorebirds and the resident white herons (kōtuku), most commonly seen October to March and often approachable by kayak.
- Ōkārito Wetland Walk: A short shore walk through oioi and mānuka where fernbirds and other small wetland birds can be heard and sometimes seen.
- Ōkārito settlement and historic wharf shed: The small settlement at the lagoon’s southern end contains part of the original wharf and an information shed reconstructed from historic timbers.
Best Time to Visit Ōkārito Lagoon#
The lagoon is productive year-round but conditions and wildlife sightings change with the seasons; rainfall is high much of the year so expect wet weather outside the drier late winter-spring months.
Weather & Climate near Ōkārito Lagoon#
Ōkārito Lagoon's climate is classified as Oceanic - Oceanic climate with mild summers (peaking in February) and cold winters (coldest in July). Temperatures range from 2°C to 20°C. Heavy rainfall (2412 mm/year), wettest in May.
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Good | 12° - 20° | 16° | 283 mm | partly cloudy | 82% | 4.7 m/s | 2.2 extreme | 14.8h |
| February | Good | 12° - 21° | 16° | 158 mm | partly cloudy | 81% | 4.2 m/s | 1.9 very high | 13.7h |
| March | Good | 11° - 19° | 15° | 256 mm | partly cloudy | 81% | 4.3 m/s | 1.2 high | 12.2h |
| April | Acceptable | 8° - 17° | 13° | 251 mm | partly cloudy | 80% | 4.8 m/s | 0.6 moderate | 10.7h |
| May | Acceptable | 5° - 15° | 8° | 338 mm | partly cloudy | 79% | 4.3 m/s | 0.2 low | 9.5h |
| June | Acceptable | 3° - 13° | 5° | 186 mm | partly cloudy | 78% | 4.8 m/s | 0.1 low | 8.8h |
| July | Poor | 2° - 12° | 5° | 277 mm | partly cloudy | 77% | 4.3 m/s | 0.2 low | 9.1h |
| August | Acceptable | 4° - 13° | 6° | 122 mm | partly cloudy | 79% | 4.5 m/s | 0.3 low | 10.2h |
| September | Acceptable | 6° - 14° | 7° | 88 mm | partly cloudy | 80% | 5.2 m/s | 0.6 moderate | 11.6h |
| October | Acceptable | 8° - 15° | 11° | 121 mm | overcast | 81% | 5.2 m/s | 1.1 high | 13.1h |
| November | Acceptable | 9° - 17° | 13° | 156 mm | overcast | 82% | 4.8 m/s | 1.6 very high | 14.5h |
| December | Acceptable | 11° - 19° | 15° | 176 mm | overcast | 83% | 4.9 m/s | 2.1 extreme | 15.2h |
How to Get to Ōkārito Lagoon#
Ōkārito is on the West Coast of the South Island; the lagoon lies about 130 kilometres south of Hokitika and is reached via the small settlement of Ōkārito at the lagoon’s southern end. The nearest local service town for guided tours is Whataroa, and many visitor transfers and birdwatching trips operate from there and nearby Franz Josef Glacier village.
The nearest major city is Christchurch; the main regional railhead for the West Coast is Greymouth (train services from Christchurch), and regional flights operate into Hokitika and other small West Coast airstrips. The final stretch to Ōkārito is by road on local highways and then short walks or boat/kayak access to reach the quieter parts of the lagoon, and much of the wetland is only practical to visit by boat or guided tour.
Tips for Visiting Ōkārito Lagoon#
- Tides and mudflats matter - mud is deep and sticky away from the main channel, so avoid walking out onto flats at low tide.
- Bring binoculars and a zoom lens for birds; many species are best seen from a kayak or small boat.
- Respect wildlife and mānaki whenua (Ngāi Tahu customary values) by keeping distance from nesting birds and not disturbing feeding areas.
- Weather can change quickly and the West Coast is wet most of the year, so pack waterproofs and prepare for muddy trails.
- If you want to explore inner channels, take a guided kayak or boat tour rather than attempting unmarked routes, because most of the lagoon is trackless and navigation can be tricky.