THE HEAT is the name of the VOYAGERS Climate-Tech Festival held at Harwell Science Campus in Oxfordshire. It is a vibrant, hands-on, practical, mind-expanding, friendship-building, exploratory, curiosity-led, science-based, creative, artistic, participatory, decentralized, experimental, edgy, live, risky, urgent and unpredictable festival that gathers 600+ talented people working on climate technologies.

Unlike a conference, THE HEAT focuses on meaningful interactions, experiences, and inspiration rather than dull panels. It features climate-technology showcases such as nuclear-fusion startups, future foods tastings, carbon capture demonstrations, climate-robotics exhibits, climate-film festivals, music performances, and startup pitch contests.

The event is produced by VOYAGERS, a global community of 4,000 impact-driven people supporting each other to solve big climate challenges. VOYAGERS offers lifelong peer support through weekend adventures, online and offline networking, social meetups, workshops, investment funds, co-working retreats, and more.

THE HEAT takes place at Harwell Science Campus near Oxford, typically in September. The first edition was held on September 20, 2024, and the next is scheduled for September 19, 2025. It attracts a wide range of participants including founders of climate startups, institutions, investors, ecosystem builders, media professionals, partners, legal experts, and corporates.

The event embraces a rich program of activities including inspiring stories, expert workshops, product demonstrations, food tastings, music and art installations, participant-led unconferences, campus tours, pitch competitions, networking events, and social parties.

The location is accessible by bus, rail, bike, and car with parking and electric car charging points available on site.