Over the last three years, we’ve witnessed something remarkable. What started in San Francisco as a grassroots experiment has quickly become one of the fastest-growing climate weeks in the world: 25,000+ participants and 1,000+ organizations took part in SF Climate Week this past Spring, now only in its third year.

As we’ve scaled, one truth has become clear: the real magic of Climate Week doesn’t come from one team or one city. It comes from the incredible network of organizations, community leaders, and individuals who convene, share, and advance solutions together.

Behind every successful Climate Week lies a huge amount of invisible infrastructure — the promotion, systems, tools, partnerships, sponsor relations, resources and know-how that make these monumental gatherings possible. For years, we’ve been building that scaffolding with a lean team and generous partners. And now, we’re ready to share it more broadly.

Today, we are proud to announce the launch of the Climate Week Network.

Explore the platform

What is the Climate Week Network?

  • We share resources, tools, and best practices so new Climate Weeks don’t need to start from scratch.

  • We provide community, mentorship, and collaboration between established and emerging Climate Weeks.

  • We amplify each other’s work through shared promotion, networks, and visibility.

Just as we often say at SF Climate Week: a rising tide lifts all boats. The more people we engage locally, the more momentum we all create globally.

Why does this matter?

We’re living through a decisive moment. Global summits often fall short, but local communities can rise to the challenge. Climate Weeks are different: they are grassroots, accessible, and built for everyone to take part.

This week in New York, thousands of people came together for Climate Week NYC — proof of the inspiration these gatherings create. But we know the energy can’t stop there. In just three years, SF Climate Week grew to 1,000+ organizations and 25,000 participants — showing how powerful it can be when a city embraces this model. And now, with cities from San Diego to Denver to Mexico City stepping forward, we know this is only the beginning.

By growing the Climate Week Network, we’re making climate action more local, more inclusive, and more durable — everywhere.

Launching with 20+ cities

We’re launching with real momentum. 20+ cities are already on the platform—some with dates set, others actively recruiting co-organizers, partners, and sponsors.

  • Up first — San Diego Climate Week (Oct 1–8)

  • Up next — Mexico City Climate Week

  • 20+ in 2026 — Explore upcoming Climate Weeks in cities across the globe that are being planned, and we encourage you to get involved — or propose a Climate Week in your own city.

If your city isn’t on the list yet, fill out this interest form to propose a city — we’re eager to support new Climate Weeks wherever there is energy and leadership.

Ways to get involved

Whether you’re an individual, a local government, a nonprofit, or a company, there’s a role for you. Through the Network, organizations can engage across multiple cities, and we’ll facilitate those connections to make participation seamless and impactful.


Quick FAQ

  • Who can start a Climate Week?
    Local climate leaders and coalitions—NGOs, universities, governments, community groups, companies, and more.

  • What does it cost to join the Network?
    Support from the Climate Week Network is free.

  • Who is behind the Climate Week Network?
    Climate Week Network is a philanthropically supported initiative led by Climatebase.org and fiscally sponsored by Grounded.org (a 501(c)(3) public charity), enabling tax-deductible donations. It’s built with partners across our network of 10,000+ climate organizations and draws on Climatebase’s work powering the Climatebase jobs platform, the Climatebase Fellowship, San Francisco Climate Week, San Diego Climate Week, Mexico Climate Week, and others.

  • How long does it take to plan a Climate Week?
    Timelines vary; we provide playbooks and mentorship to accelerate planning. Many first-time Climate Weeks plan for ~3–6 months

Climate Week, everywhere.

When cities host Climate Weeks, policy changes, capital moves, local leaders emerge, and communities take center stage while connecting with the global movement. And each new Climate Week sparks collaborations, builds on-ramps to act, sustains momentum, and accelerates solutions.

In the next 12 months, we aim to help launch and grow dozens of Climate Weeks around the world—on the path to every major city.

We invite you to get involved.

Looking Ahead

The challenges we face are immense. But so is the potential for collective action. By joining together, sharing resources, and supporting one another, we can accelerate climate solutions in every corner of the world.

We’re just getting started. And we’d love for you to join us.

—
Evan Hynes
CEO, Climatebase

Morgan Campbell
Director of SF Climate Week & Head of Partnerships, Climatebase

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