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Our vision is for Welsh seas to be clean, healthy, safe, productive, and rich in biodiversity.

We are marine and coastal partners from across government, industry, conservation, and communities who support sustainable development actions for our coasts and seas. In Wales, we have many existing approaches, people and projects seeking to support marine ecosystems and the benefits we receive from them. However, we need to do more, and we need to do it faster, using our resources effectively. Wales Coasts and Seas Partnership (CaSP Cymru) work together, as partners, stakeholders, and communities, to deliver our three themes through a programme of work, to underpin our vision and ambitions for resilient coasts and seas.

The importance of Welsh seas

Our coasts and seas are central to life in Wales, shaping our well-being, culture, language, and fishing heritage.

The sea around Wales doubles the size of the country.

69% of the sea and coastline is designated for the diverse habitats and marine life that inspire and sustain us.

Almost 60% of the Welsh population live within 3 miles of the sea.

Welsh seas provide vital benefits, including food, renewable energy, carbon storage, tourism and health and well-being. However, these ecosystems face growing pressure from climate change, pollution, and increased use of natural resources. Managing our seas responsibly is essential to address the climate and nature emergencies while protecting biodiversity and coastal communities.

CaSP Cymru have a developed a shared narrative which explains what we do.

Download CaSP Cymru's shared narrative

Y Môr a Ni Endorsed by the UN Ocean Decade

The Y Môr a Ni strategy and the King's Baton Relay events have successfully received endorsement as official activities of the United Nations Decade of Ocean Science for Sustainable Development (the UN Ocean Decade). The endorsement recognises activities that make a meaningful contribution towards the Ocean Decade's vision of delivering “the science we need for the ocean we want” and aligns them with a global network of initiatives addressing key ocean challenges.

Launch of the CaSP Website

The Wales Coasts and Seas Partnership has launched its new website to support shared action for the health and resilience of the seas around Wales. The site provides information on the work of the Partnership, and its key themes, and also providers updates on current projects, community partnerships and opportunities to get involved.

Y Môr a Ni and partners at Porthdinllaen

Y Môr a Ni represents Welsh seas for the King's Baton Relay

Y Môr a Ni and its partners – North Wales Wildlife Trust, Project SIARC (led by the Zoological Society of London and Natural Resources Wales), the British Sub-Aqua Club (BSAC), and Pen Llŷn a’r Sarnau Special Area of Conservation – are joining forces with Team Wales to celebrate Wales’ seas, wildlife and coastal communities as part of the King's Baton Relay.

Launch of MARINE Fund Cymru

The MARINE Fund Cymru was officially opened for contributions by the Deputy First Minister and Cabinet Secretary for Climate Change and Rural Affairs at the Coastal Futures Conference on 29 January 2026.

Young people on a beach listening to someone talk

The Coastal Coordinator Challenge Fund

In Autumn 2025, the Welsh Government and the Wales Council for Voluntary Action ran a Challenge Fund, seeking to appoint Coastal Coordinators to help strengthen coastal capacity across Wales.

Our members

Our membership aims to be as inclusive as possible, ensuring appropriate representation for everyone who has an interest in the maritime area of Wales.

Find out about membership

Wales Coasts and Seas Partnership

Improving Ocean Literacy

Increasing Blue Investment

Coastal Capacity Building