New to Great Big Green Week? Start here
Every year, something pretty special happens across the UK.
In towns, cities and villages, people come together to celebrate the places they love and take action to protect them. It might be a nature walk in a local park, a community meal, a repair café, or a school project. It might be something small, or something that brings a whole town together.
That moment is called Great Big Green Week.
If you’re new to it, here’s what it’s all about – and how you can be part of it, and how you can join millions coming Together For Good - for our communities, for our climate and for our shared future.
Credit: @netzerostratford @SAUClimate @stratfordclimateaction
A week of community action across the UK
Great Big Green Week is the UK’s biggest celebration of action to tackle climate change and protect nature.
For nine days each June, people organise events and activities in their local areas. These events showcase the work already happening in communities and invite others to get involved. They show how people across the UK are already taking practical action to create a healtheir, fairier safer future.
At its heart, it’s simple. It’s about people coming together where they live – in schools, neighbourhoods, workplaces and community spaces – to do something positive for climate and nature.
And when that happens all at once, across the UK, it sends a powerful message: people care, people are acting, and together we want to see change. Together, we’re showing the scale of the action already happening in our communities - and the change people want to see.
How it started - and how it’s grown
The first Great Big Green Week took place in 2021, ahead of COP26 in Glasgow. It was designed to show that climate and nature action isn’t a niche concern, but something that matters to people right across the country.
Since then, it has grown into something much bigger.
In 2025, 1.2 million people took part. That’s roughly the size of Birmingham, or about one in every 58 people in the UK. From coastal towns to big cities, communities came together to take action and celebrate what’s already happening locally.
That’s 1.2 mllion people coming Together for Good - showing just how much people across the UK care, and are ready to act.
Great Big Green Week is now firmly part of the calendar for many communities, organisations and local groups across the UK.
Credit: Mark Chilvers and @balham.library
Why it matters
What makes Great Big Green Week powerful isn’t just the scale, but who takes part.
Many people get involved for the first time. Some have never organised an event before. Many groups don’t describe themselves as “green” organisations at all.
That’s what makes it different. It’s not just about environmental groups – it’s about communities.
It’s a chance to celebrate what’s already happening, bring new people in, and build connections that last beyond the week itself. Often, it sparks new ideas, partnerships and ongoing activities that continue long after June.
Across the UK, people are already feeling the impacts of climate change and loss of nature - from rising costs to extreme weather and pressure on our local green spaces. Great Big Green Week is a chance to come together and take practical that makes a real difference to our lives and our communities.
What it can look like in your community
There’s no single way to take part in Great Big Green Week. It looks different everywhere, because it reflects what matters locally.
In some places, people organise a full programme of events across the week. In others, it might be a single event that brings people together.
In Dorking, local groups collaborated on a week of activities including a sustainability trail, a climate café, a street swap and a community picnic. In Alton, a toy library teamed up with other groups to create a family-friendly event with crafts and food. In Swansea, organisers spoke about how being part of Great Big Green Week helped bring people together and create a sense of hope and shared purpose.
Sometimes it’s about creating something new. Sometimes it’s about shining a light on what’s already happening. Often, it’s a bit of both.
The starting point is simply this: what’s at the heart of your community?
Ealing Tree Festival in Great Big Green Week; Credit: Trees for Cities
Getting involved
There are lots of ways to take part, and none of them need to be complicated.
You might decide to organise something yourself – a small event, a gathering, or an activity that brings people together. It doesn’t have to be big, and you don’t have to do it alone. Many people start with something they’re already involved in and build from there.
You might prefer to join an event near you, support what others are doing, and bring friends or neighbours along.
Or you might simply share what’s happening in your area, helping more people hear about it and get involved.
Whatever role you play, you’re part of something bigger.
You can be part of a UK-wide movement of people coming Together for Good.
An interfaith picnic during Great Big Green Week; Credit: Michael Preston (Quakers)
You don’t have to do it alone
Great Big Green Week is supported by The Climate Coalition and over 130 organisations working together across the UK.
If you’re thinking about getting involved, there’s plenty of support available. You can explore training sessions and networking opportunities to build your confidence and connect with others, browse resources and guides to help you plan your activity, and read community stories from across the UK to spark ideas and see what’s possible.
Whether you’re just getting started or already have something in mind, there’s support to help you take the next step.
Be part of it
Great Big Green Week is a chance to celebrate your community, connect with others, and take action for the future we all share.
Because when people come together locally, it adds up to something much bigger.
Together, it shows the power we have when we act Together for Good. Be part of something bigger. Be part of Great Big Green Week.
Find out more and get involved.