Climate Week NYC and COP: What Do They Have in Common and How Do They Differ?

Climate Week NYC is held every year in New York City. Timed to coincide with the United Nations General Assembly, it serves as a bellwether ahead of COP, which takes place a few weeks later and will be held in Antalya, Türkiye, in 2026.

“Both events are extremely important: Climate Week brings a crucial business and investment perspective, while COP is the main forum for generating political momentum and public-private collaboration,” explains Miguel Muñoz, climate coordinator at the Spanish Green Growth Group (GECV), an association of nearly 60 companies that promotes public-private collaboration in the green transition. According to Muñoz, the two events “do not compete with one another; quite the opposite, they often reinforce each other. Climate Week takes place less than two months before COP, so it often serves as an early forum for building momentum, alignment and visibility ahead of the debates and commitments that are later addressed at the climate summit.”

What is Climate Week NYC? Origins and international relevance

Climate Week NYC was originally launched by Climate Group, an international nonprofit founded in 2004 that works with business leaders and regional governments to accelerate climate action. Over the years, it has grown into a week that brings together all kinds of events and meetings organized by a wide range of organizations, companies and institutions to advance the climate agenda. Participants range from world leaders and business executives to communities driving climate action and other representatives of civil society.

Climate Group, which launched the initiative, describes Climate Week NYC as a way to “connect the people and ideas shaping how we live, work and build a low-carbon economy and a more secure future.” It was first held in 2009 as a parallel event to the annual meeting of the United Nations General Assembly in New York. The idea was to provide a forum for discussion ahead of the Conference of the Parties to the United Nations Framework Convention on Climate Change (UNFCCC).

“It is a major event on the international climate agenda, with a strong focus on business and investment, held on the sidelines of the United Nations General Assembly. It brings together a host of high-level events and meetings where companies share best practices, launch campaigns and policy positions, and showcase leadership and opportunities arising from the green transition,” says Muñoz.

What began in 2009 has evolved into an extensive program of more than 1,000 events, campaigns and opportunities for climate leaders at every level to get involved. They cover topics ranging from health and energy to finance and food and take place across New York City. In fact, there is no single format for Climate Week NYC events. They may be in-person, virtual or hybrid, ranging from small community gatherings and workshops to large-scale conferences and public events.

What is COP?

To understand the importance of the Conference of the Parties (COP) on climate change, we need to go back to 1992, when the historic Earth Summit was held in Rio de Janeiro. It was there that the United Nations Framework Convention on Climate Change (UNFCCC) was adopted, a binding treaty aimed at limiting greenhouse gas (GHG) emissions. Representatives of 154 countries agreed to promote sustainable development in response to scientific evidence that burning fuels such as coal and oil was driving rising global temperatures.

The UNFCCC has been ratified by 197 countries and by the European Union as a regional economic integration organization. Three years later, in 1995, COP1 was held in Berlin, Germany—the first formal meeting of a conference that brings together governments, international organizations, businesses, the scientific community and civil society organizations.

From COP1 in Berlin to COP31 in Türkiye, the annual high-level climate summits have sought to review implementation of climate agreements and negotiate new commitments. Two summits stand out in particular: COP3, which produced the Kyoto Protocol, the first major global agreement to reduce emissions; and COP21, where almost 200 countries adopted the Paris Agreement, which aims to limit global warming to 1.5°C above pre-industrial levels.

“In recent years,” notes the GECV climate lead, “COP has become a central forum for civil society as a whole. Businesses, in particular, have a crucial role to play: showcasing the climate solutions already available, calling on governments to provide the stability and policy signals needed to accelerate investment, forging partnerships and multi-stakeholder agreements, and generally supporting an ambitious framework.”

How do Climate Week NYC and COP31 differ?

Although Climate Week and COP share the fundamental goal of accelerating the green transition and limiting global warming, they operate very differently in terms of their dynamics, formats and degree of legal force. The expert argues that “the most important difference lies in the institutional nature of the two events.”

Miguel Muñoz notes that both events have increasingly emphasized “the importance of partnerships and collaboration in tackling climate challenges and seizing the opportunities created by the green transition.” Businesses have also taken on an increasingly important role at both, “both because of their ability to drive the climate agenda and because of their contribution to implementing solutions across every sector.” Beyond these similarities, the main differences between Climate Week and COP are as follows:

•  Nature and legal force: COP is an official political forum where negotiating countries can adopt legally binding agreements and broader international commitments, such as the historic Paris Agreement. Climate Week NYC, by contrast, has no regulatory or official authority. Its aim is to mobilize economic and social stakeholders to accelerate the real-world implementation of decarbonization measures.
• Organization and governance: COP is organized by the secretariat of the United Nations Framework Convention on Climate Change (UNFCCC) together with that year's host country, which in 2026 will be Türkiye. Climate Week is coordinated by the international nonprofit Climate Group alongside the United Nations General Assembly and New York City.
• Participant profile: at COP, diplomatic delegations, heads of state and official negotiators take center stage. At Climate Week NYC, the focus shifts to the private sector, investors, financial institutions, NGOs, technology startups and local communities, fostering public-private partnerships and market-based solutions.
• Access and representation: COP's negotiation zone requires official UN accreditation and is generally restricted to delegates and authorized observers. Climate Week, by contrast, is decentralized and inclusive, with hundreds of panels, workshops and public or virtual events held across the city and open to the general public.
• Focus and format of debate: at COP, discussions center on technical and regulatory issues such as carbon markets, financing for the Loss and Damage Fund and the review of Nationally Determined Contributions (NDCs). Climate Week discussions are more agile and pragmatic, focusing on innovation, technological solutions, sustainable investment and corporate commitments.

Climate Week NYC 2026 and COP31: dates, themes and expectations

Climate Week NYC will take place from September 20 to 27, 2026. This year's event will focus on “the energy, the impact, and the action that we drive together,” according to the organizers.

COP31, meanwhile, will take place almost two months later, from November 9 to 20, 2026, in Antalya, Türkiye. This year's summit will have an unusual feature: leadership will be shared by Türkiye and Australia. Several key figures from the two countries will play pivotal roles at the summit. COP31's main objective is to ensure that countries turn their climate commitments into concrete, actionable measures, as the official website explains. Although the COP31 agenda has not yet been officially finalized, priority themes have already been set for the Action Agenda led by the COP Presidency:

• Zero Waste: reducing methane emissions from waste.
• Oceans and Seas: strengthening the climate resilience of coastal and marine ecosystems.
• Food Security: transforming the agriculture and food sector.
• Resilient Cities: promoting resilient infrastructure and reducing emissions from buildings.
• Climate Implementation Bridge (CIB): an initiative designed to bridge the gap between countries’ climate commitments—as set out in their Nationally Determined Contributions (NDCs)—and action. Its aim is to help turn those commitments into concrete, viable projects capable of attracting financing from banks, climate funds and the private sector, thereby accelerating implementation.
• Youth and Education: climate literacy.
• Green Industrialization: strengthening international coordination and tracking progress on transparency and industrial transformation.
• Clean Energy Transition: electrification and optimization of the power grid through digitalization and smart systems.
• Rio Synergy: carbon sinks and biodiversity loss.
• Dynamic and Resilient Health Systems: developing resilient health infrastructure, early-warning systems and outbreak monitoring.

In addition, a pre-COP31 conference will be held in Fiji, near Australia, from October 5 to 8, 2026, including a leaders' gathering in Tuvalu, another Pacific island country, to ensure that the priorities of Pacific island nations—among the countries most vulnerable to climate change—are at the heart of the COP31 agenda.

“The main challenge is to prepare properly for participation in both events so that it translates into opportunities and value creation. For a business organization, it is essential for that participation to be underpinned by a solid business and investment commitment, as well as clear and consistent positions on the main issues under discussion,” says the representative of the Spanish Green Growth Group.

Frequently asked questions about Climate Week NYC and COP

What is Climate Week NYC?

It is an international event organized by Climate Group that brings together businesses, governments, investors and civil society to advance climate action.

What is COP?

The Conference of the Parties (COP) is the decision-making body of the United Nations Framework Convention on Climate Change.

What is the main difference between Climate Week and COP?

COP negotiates international agreements between states, while Climate Week promotes voluntary initiatives and partnerships among public- and private-sector stakeholders.

When will Climate Week and COP31 take place in 2026?

Climate Week will run from September 20 to 27, while COP31 will take place from November 9 to 20 in Antalya, Türkiye.

Why are the two events complementary?

Climate Week helps build momentum around commitments and initiatives that can later influence the official COP negotiations.