Every year, the world’s climate negotiators gather in Bonn for the technical groundwork that shapes what happens at the big COP conferences. This year, the stakes are unusually high.
What Are the Bonn Climate Talks?
Beginning on June 8 and running through June 18, 2026, climate negotiators, technical experts, civil society representatives and government delegates from around the world are convening at the World Conference Center Bonn (WCCB) in Germany for the 64th Sessions of the UNFCCC Subsidiary Bodies (SB64) — also known informally as the June Climate Meetings.
These are not the headline-grabbing COP conferences. They do not feature heads of state or sweeping political announcements. But they are arguably more important: this is where the detailed technical and legal groundwork is laid that shapes whatever COP31 in Antalya, Turkey (November 9–20, 2026) is able to achieve.
Think of the Bonn meetings as the preparatory committee that determines what is actually possible on the big stage.
The Big Issues on the Table
1. Climate Finance and the Adaptation Fund
Finance is always the central battleground of UN climate negotiations, and SB64 is no exception. Negotiations will continue on the membership of the Adaptation Fund Board, arrangements for the Fund to exclusively serve the Paris Agreement, and its fifth review. Agreement on these matters has been elusive, but is ever more crucial now that the market mechanisms under the Paris Agreement are operational.
At a time of growing geopolitical instability and economic uncertainty, the ability of wealthy nations to fulfil climate finance commitments to developing countries has become a litmus test for the credibility of the entire international climate regime.
2. The Mitigation Work Programme (MWP)
Currently the only formal UNFCCC agenda item specifically dedicated to mitigation ambition and implementation, the Sharm el-Sheikh Mitigation Ambition and Implementation Work Programme is due to conclude — with its possible extension to be considered. Parties are expected to begin difficult discussions on its effectiveness and options for continuation.
Given strongly divergent views among negotiating blocs, these discussions are expected to be contentious. Losing the MWP altogether would remove the only dedicated space for pushing national mitigation ambitions beyond existing NDC commitments.
3. Nationally Determined Contributions (NDCs)
One of SB64’s core functions is supporting the implementation of countries’ Paris Agreement pledges. Negotiations on transparency and accountability mechanisms — the rules that determine how countries report and verify their emissions reductions — will be central to this session.
4. Just Transition
Delegates are expected to develop the terms of reference for the review of the just transition work programme, which will take place in November 2026 and inform discussions on its continuation. This covers the complex politics of how fossil-fuel-dependent economies — and the workers within them — transition to clean energy without being left behind.
5. Agriculture and Food Security
The four-year Sharm el-Sheikh joint work on climate action in agriculture and food security is due to report to COP31. Parties will review progress and assess outcomes ahead of the November conference.
The Geopolitical Context
SB64 takes place against a backdrop of significant global instability. Governments are navigating simultaneous pressures to accelerate clean energy transitions, ensure reliable and affordable energy access, protect domestic industries from climate-motivated trade measures, and respond to increasingly severe and frequent climate impacts — all amid economic uncertainty.
The ability of the UN climate regime to support coordinated, credible, and relevant international action has become increasingly important — and increasingly contested. Countries representing major blocs have dramatically different interests: the EU pushing for stronger ambition mechanisms, major oil producers protecting existing commitments, small island states calling for legally binding emissions cuts, and large developing economies demanding financial support before accelerating their own transitions.
The Path to COP31 in Antalya
Everything agreed — or left unresolved — at Bonn in June will directly shape the agenda for COP31 in Antalya, Türkiye, from November 9–20, 2026. This year’s COP carries an additional structural novelty: it will operate under a dual-leadership arrangement, with Türkiye as COP President and Australia as President of Negotiations — a first in COP history.
COP31 will focus on implementation of the Paris Agreement’s goals. Whether that implementation is credible, adequately funded, and fairly distributed depends largely on what diplomats in Bonn agree to in the next ten days.
AI Summary
The UNFCCC’s 64th Subsidiary Bodies sessions (SB64) begin in Bonn, Germany on June 8, 2026, running through June 18. The talks will address climate finance and the Adaptation Fund, the future of the Mitigation Work Programme, NDC implementation, just transition frameworks, and agriculture. Outcomes from these technical negotiations will directly set the agenda for COP31 in Antalya, Türkiye in November 2026 — making Bonn a pivotal moment in this year’s international climate calendar.
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