Language 
10 Best sustainability conferences to attend (2026)
10 Sustainability conferences to attend in 2026, with dates, locations, and focus areas to plan your year.
Whether you’re tracking new ESG rules, scouting climate tech, or building cross-border partnerships, there’s a sustainability conference in 2026 that fits.
Below is a rundown of the best sustainability conferences this year:
- Sustainable Brands (SB’26 San Diego)
- European Sustainable Energy Week (EUSEW)
- World Biodiversity Forum
- The Scope 3 Innovation Forum
- London Climate Action Week
- Trellis Impact
- Hamburg Sustainability Conference
- World ESG Summit and Awards
- International Conference on Sustainable Development
- Climate Week NYC
If your team is traveling to any of these sustainability events and conferences, Holafly for Business keeps them connected on arrival.
Business travel made easy
Best 2026 sustainability conferences at a glance
These upcoming sustainability conferences run from June onwards, spanning ESG events, environmental conferences, and sustainability networking events.
| Event | Date | Location | Focus |
|---|---|---|---|
| Sustainable Brands (SB’26 San Diego) | Jun 8–10, 2026 | San Diego, US | Sustainable branding and marketing |
| European Sustainable Energy Week | Jun 9–11, 2026 | Brussels, Belgium | Clean energy policy |
| World Biodiversity Forum | Jun 14–19, 2026 | Davos, Switzerland | Biodiversity and planetary health |
| The Scope 3 Innovation Forum | Jun 16–17, 2026 | Amsterdam, Netherlands | Value-chain decarbonization |
| London Climate Action Week | Jun 20–28, 2026 | London, UK | Climate action |
| Trellis Impact | Jun 23–25, 2026 | San Francisco, US | Climate tech and circular economy |
| Hamburg Sustainability Conference | Jun 29–30, 2026 | Hamburg, Germany | SDGs and multilateral dialogue |
| World ESG Summit and Awards | Sep 7–8, 2026 | Dubai, UAE | ESG strategy and reporting |
| International Conference on Sustainable Development | Sep 9–10, 2026 | Rome, Italy | Sustainable development research |
| Climate Week NYC | Sep 20–27, 2026 | New York City, US | Climate action |
Sustainable Brands (SB’26 San Diego)
June 8–10, 2026 | Town and Country Resort, San Diego, US | Sustainable branding and marketing
Sustainable Brands marks its 20th year with an event for brand, marketing, and innovation leaders. The focus is on folding sustainability into core business decisions to drive financial performance and brand value, all under the 2026 theme “ALL RISE.”
On the agenda: breakthrough design and innovation, shifting mindsets and selling sustainability, governance and metrics, and market transformation and collaboration. Speakers come from major brands including Costco, Walmart, Amazon, Oatly, Microsoft, and HP, so the sessions stay grounded in how large companies put sustainability to work.
European Sustainable Energy Week (EUSEW)
June 9–11, 2026 | Brussels, Belgium, and online | Clean energy policy
The European Sustainable Energy Week is the European Commission’s flagship clean energy event, now in its 20th edition and run by CINEA. It pairs an in-person program with online sessions built around a clean, secure, and competitive Energy Union.
The program centers on a policy conference with 50 sessions, plus the EUSEW Awards recognizing local energy action and women in energy. An energy fair runs alongside it, showcasing work in efficiency and renewables.
World Biodiversity Forum
June 14–19, 2026 | Davos, Switzerland | Biodiversity and planetary health
At the World Biodiversity Forum, scientists, artists, and businesses come together on biodiversity loss and related planetary crises. The University of Zurich organizes it, and the 2026 theme is “Leading Transformation Together.”
Much of the work is about putting the Kunming-Montreal Global Biodiversity Framework into practice through networks that span science, the arts, and business, not just government bodies. The program covers thematic tracks, oral and poster presentations, and field excursions.
The Scope 3 Innovation Forum
June 16–17, 2026 | Amsterdam, Netherlands | Value-chain decarbonization
The Scope 3 Innovation Forum is a focused strategy event for sustainability, procurement, and finance leaders working on value-chain decarbonization and climate competitiveness. Sessions run under Chatham House Rules, so the discussion stays off the record and gets specific.
Day one covers strategy, energy systems, the SBTi 2.0 standards, and scaling industrial heat solutions. Day two turns to procurement resilience, GHG accounting standards, and using AI for Scope 3 measurement.
London Climate Action Week
June 20–28, 2026 | London, UK | Climate action
Hosted by E3G, London Climate Action Week is one of the world’s largest independent climate events and a bridge between UN COPs. It works as an open platform, where community groups, businesses, and ministers register their own sessions, with over 750 events and 75,000+ people involved.
Trellis Impact
June 23–25, 2026 | Moscone West, San Francisco, US | Climate tech and circular economy
Trellis Impact is a climate-tech and sustainable business event focused on scaling carbon, energy, and circular-economy solutions.
On the agenda: circular business models, decarbonizing operations, carbon removal, grid solutions, and capital for startups. A dedicated “AI x Sustainability” track examines reporting automation and climate risk intelligence.
Hamburg Sustainability Conference
June 29–30, 2026 | Hamburg, Germany | SDGs and multilateral dialogue
The Hamburg Sustainability Conference is a platform for multilateral dialogue and cross-sector alliances tied to the Sustainable Development Goals.
Three pillars anchor the program: resilient economies, risk and conflict, and human collaboration. Sessions cover finance, technology, infrastructure, geopolitical instability, and reform of global governance, with a focus on building alliances that span sectors and borders.
World ESG Summit and Awards
September 7–8, 2026 | Metropolitan Hotel, Dubai, UAE | ESG strategy and reporting
Now in its 7th edition and 3rd in Dubai, the World ESG Summit and Awards brings regulators, investors, and corporate leaders together to shape practical ESG strategy.
Target sectors include banking and finance, energy and utilities, real estate, manufacturing, logistics, and agriculture. Focus areas span ESG reporting software, rating agencies, green bonds, carbon accounting, and waste recycling, with an awards program recognizing standout work across each.
International Conference on Sustainable Development
September 9–10, 2026 | Roma Eventi Congress Center, Rome, Italy | Sustainable development research
The 14th International Conference on Sustainable Development is a multidisciplinary academic forum organized by the European Center of Sustainable Development in collaboration with CIT University. The 2026 theme centers on a foundation for sustainable development across research, practice, and education.
The tracks split across economic, environmental, and socio-cultural sustainability, covering everything from green financing to biodiversity and social equity.
Climate Week NYC
September 20–27, 2026 | New York City, US | Climate action
Run by the Climate Group alongside the UN General Assembly, Climate Week NYC is billed as the world’s largest climate event.
With over 1,000 events on energy, impact, and collective action, Climate Week NYC draws more than 100,000 people. The crowd runs the full span, from global leaders and policymakers to business executives and grassroots change-makers.
Keep your sustainability team connected with Holafly for Business
When your team is heading to any of the top sustainability conferences above, reliable mobile data is part of the plan.
Holafly for Business is a business eSIM provider available in 160+ destinations that activates on your team’s devices, so they don’t have to source local SIM cards or incur roaming charges. You also get access to our centralized management platform, the Holafly Business Center, where you can manage individual eSIMs, invoices, and data usage.
Holafly Plans for Business come in four tiers:
- On Demand (€3.40/day): A pay-as-you-go option for teams that travel now and then, since you only pay when someone is on the road.
- Always On (€9.95/year): Best for employees taking up to four short trips per year, with the option to upgrade to Unlimited when they need more data.
- Unlimited (€57/month): Unlimited data with a built-in VPN, ad blocker, and web protection, ideal for teams who need to work securely between sessions.
- Enterprise (custom pricing): For large organizations that need geo-blocking, priority support, and customizable data limits and coverage.
Not sure which plan is right for your team? Book a demo.
Business travel made easy
I’m a writer with over eight years of experience in digital content. My work has appeared in publications such as The New York Times, Forbes, Business Insider, and the BBC. At Holafly, I write clear, practical guides to help travelers stay connected with eSIM technology. In my spare time, I enjoy car detailing, biking around Warsaw, and capturing portraits.
