
The Coastal Atlas
A field guide to the kelp coastlines of the world.
Kelp forests ring the temperate ocean — a necklace of green from the Aleutians to Tasmania, Brittany to the Humboldt. The atlas charts them coast by coast: the ecology, the seasons, the wildlife and how to see it for yourself.
Stylised position plot, not to scale — each dot is a coastline guide in the atlas below.
The Northeast Pacific
From the Aleutians to Baja — the longest temperate kelp coastline on Earth, watched by otters and tested by heatwaves.
Australia & the Great Southern Reef
Eight thousand kilometres of temperate reef that most Australians have never heard of — golden kelp, seadragons and lobsters.
New Zealand
Aotearoa’s southern kelp — bull kelp surf zones, kina barrens and fiords where the forest meets the mountains.
East Asia
The kombu coasts — Hokkaido and the Sanriku ria, where kelp has been food, trade and identity for centuries.
Europe
From Arctic Lofoten to Galicia’s rias — oarweed, tangle and sugar kelp on the continent’s wild western edges.
The Northwest Atlantic
New England, the Maritimes and Newfoundland — one of the fastest-warming seas on Earth, where kelp’s fortunes are shifting in real time.
The North Atlantic & Arctic
Faroes, Iceland, Greenland and Svalbard — the cold green border where kelp forests meet tide races, glaciers and the polar night.
Southern Africa
Where two oceans meet — sea bamboo forests patrolled by sharks, otters and freedivers off the Cape.
South America
The Humboldt frontier — upwelling so rich it grows kelp almost to the Atacama.
Patagonia & the Southern Ocean
The roaring latitudes — subantarctic kelp that rafts life across entire ocean basins.
Where Tidewright works
Eight of these coastlines host Tidewright restoration programs — see the global map and the work itself.
See the projects →
Who lives there
From giant kelp to weedy seadragons — the encyclopedia profiles the species behind every guide here.
Open the encyclopedia →
Get in the water
Practical guides to kelp-forest diving, snorkelling safely and photographing the canopy.
Read the explore guides →
Know a kelp coastline we should chart?
The atlas expands with every field season. Tell us about your home coast — or start a restoration program on it.










































