An aerial view of a rugged, rocky coastline where turquoise waves are crashing against the shore.

Big Blue Day

Raise awareness of our awe-inspiring seas and marine wildlife by throwing your own day of celebration at school, work or with friends.

    Why host a Big Blue Day

    A Big Blue Day isn’t just a fun excuse to dress up, bake, or get competitive. It’s a direct investment in the health of our seas. Every pound raised fuels the Marine Conservation Society’s mission to protect and restore the ocean we all depend on.

    Your fundraising supports vital work safeguarding creatures like turtles, dolphins, sharks, and seabirds. From campaigning for cleaner waters to protecting fragile habitats, your Big Blue Day helps ensure marine life can thrive, not just survive.

    When you host a Big Blue Day, you’re not just raising money but also raising awareness. You’re starting conversations, inspiring action, and reminding people that the ocean needs us as much as we need it.

    A harbour seal raises its head above water. It has a smooth dog-like face with big brown eyes, a short nose and whiskers. Frankly it is adorable and looks away from the camera to the right.

    A harbour seal  |  Image credit: Peter Bardsley

    Every event, no matter the size, becomes part of a nationwide wave of support for cleaner, healthier, better-protected seas.

    How to throw a Big Blue Day

    What to do next

    Check out our A-Z of fundraising ideas

    Stuck for fundraising ideas? Browse our A to Z list and be inspired.
    2 surfers holding surfboards and wearing wetsuits running alonga beach. The ocean is behind them

    Fundraising resources

    From being able to receive contactless giving to beautiful posters advertising your event, find all the resources you may need to organise a successful fundraiser.

    Organise a Big Blue Dash

    Raise awareness of our awe-inspiring seas and marine wildlife by throwing an ocean themed fun run at your school.