Great Big Green Week


Join us to make history as part of the biggest climate event the UK.

Taking place between 18-26 September there are events across Watford and Three Rivers ranging from walks to movies, litter picks to food demonstration events, plus community and climate focused events – there is something for everyone.  

The Great Big Green Week campaign aims to draw attention to climate change, destruction of the natural world, while also making a connection with these issues and actions locally in Watford and Three Rivers.

This year, we in the UK have a huge opportunity to raise the ambition of plans to tackle climate change at home and abroad. The UK is hosting a major UN climate summit, known as COP26, in Glasgow this November. The time is now to be part of a Great Big Green Week that sets the stage for the most ambitious climate summit ever. Together we will show decision makers that people from all walks of life are stepping up to take action on climate change – and we need them to step up too.

Three Rivers are hosting FREE screenings of The Lorax and David Aattenborough Life On Our Planet at Watersmeet Theatre and we would love to see you there! Please book your place in advance through the Watersmeet Website.

Find an event

Click here to look through the events booklet for all details of the events shown in the calendar below

Below is an outline of all the events so far – events are still being submitted – so keep checking this calendar and booklet for more details!

Click on the image below for a larger version.

Green Week Events Calendar

Watford and Three Rivers Great Big Green Week Events Calendar (PDF)

An interactive map of events can be found on Google Maps here, or you can view the interactive map below (click on a pin for details of each event).


Host an event

Join us in creating the Green Week this September! If you’d like to get involved – either in the planning or to contributing an event or item, please contact

Below you can find the information you need to register your event:

Co-ordinated by Watford and Three Rivers Friends of the Earth
Working with Watford Borough Council and Three Rivers District Council