World Saltmarsh Day
11 June
World Saltmarsh Day (11 June) is a day to celebrate the superpowers of this amazing wetland habitat. For 2026 World Saltmarsh Day is celebrating the amazing biodiversity of saltmarshes around the world.
From the tiniest marine worm to the most spectacular flock of waders, saltmarshes support a huge abundance of biodiversity year-round, with many species relying on these wetlands for some part of their life cycle.
World Saltmarsh Day is organised by WWT, the wetland charity. As wetland experts, we're working on a number of large scale saltmarsh restoration projects, researching and sharing the benefits of these amazing habitats, and contributing to the saltmarsh carbon code.
And we need your help to shout about these precious coastal ecosystems.
What's so special about saltmarsh?
Saltmarshes are coastal wetlands that are filled and drained by the tides, creating a unique watery mosaic of salt-tolerant plants, creeks, pools and grasses that host a vast array of wildlife.
As well as being incredible biodiversity boosters, saltmarshes can capture carbon up to 40 times faster than forests, absorb the energy of the tides – protecting manmade sea defences behind them – and give people a beautiful place to get close to nature.
These habitats have historically been seen as unproductive and drained for use as agricultural land, or squeezed by static sea defences but we are now beginning to understand what we have lost.
There is good news: Saltmarshes can be restored relatively quickly, and there is a growing consensus of the value they provide to people and nature.
Supporting World Saltmarsh Day
If you would like to help spread the word about the superpowers of saltmarshes and World Saltmarsh Day please share the date with your friends, post about the superpowers of saltmarsh on 11 June and feel free to download and share our saltmarsh factsheet and poster.
If you would like to be kept up to date about our plans for World Saltmarsh Day or plan to post on the day please email elliot.cassley@wwt.org.uk, tag WWT in your posts and use #WorldSaltmarshDay.
