Portsmouth's Climate Future

Thank you for your feedback!

As our project team continues to examine and input all the community feedback into the final plan, we invite you to continue exploring the latest Summary Sheet listing all of the greenhouse gas emission reduction strategies, climate adaptation and resilience strategies, and our net zero goals for both the community and the municipality.


Recent Events:


February 6th, 2024 - Portsmouth's Climate Future Workshop #3 (6:00 - 8:00 p.m. in the Portsmouth City Hall Council Chambers) 

(See flyer)


November/December 2023 Update

The Project Team met in late November and early December to review project progress, schedules, and updated emissions forecasting results. The consultant team provided updated adaptation strategies and strategies potentially requiring capital improvements to the Sustainability Committee for their December 21 meeting. The team will provide a brief fact sheet for public distribution in January while a complete draft of the Climate Action Plan is being prepared. A third public workshop is scheduled for Tuesday, February 6 in the Council Chambers at City Hall where the team will host a conversation around the emission projections, major takeaways, and opportunities for implementation. An event celebrating the complete CAP is expected to be scheduled for the spring.

Local November Climate Resiliency & Sustainability Events:

November 27 - Community Conversation on Health & the Changing Climate (Portsmouth Climate Action)


October 2023 Update

In October, the Project Team reviewed public feedback received to date, incorporating public review into the list of climate change mitigation strategies. This public feedback on the most impactful (highest GHG reductions and/or highest cost to implement) mitigation strategies will form an important basis of the climate action plan. Public input included critical knowledge highlighting local zoning, infrastructure, and energy needs, strengthening local policies and initiatives to promote climate mitigation.

Working with the Rockingham Planning Commission, the Project Team received results from newly-updated models of transportation demand and population estimates for the year 2035, estimates which will be used in developing the City’s Business-As-Usual estimates. Finally, working with local and regional experts in their fields, the Project Team began development of adaptation strategies which will become a roadmap for resiliency within the City.


Local October Climate Resiliency & Sustainability Events:

October 18 - Clean Energy NH Circuit: Seacoast Edition @ Music Hall Lounge

October 21 - Project Upcycle Runway Event @ 3S Artspace

October 22 - Drive Electric Portsmouth @ Bridge Street Parking Lot 



Liars Bench

Thank you to everyone that came out for our community discussion at Liars Bench!


Be on the lookout for announcements of more community discussions and CAP workshops as we draw closer to the release of the CAP.


At this time, our consultant team is reviewing all feedback and finalizing our list of strategies. Check back soon for updates!

Interested in looking at the draft Climate Action Plan strategies? Find a total list of draft strategies here and in the sidebar on the right.



September 2023 Update


In collaboration with the City’s consultant team of VHB, Resilience Planning & Design, and the Rockingham Planning Commission, the Project Team held our most recent public workshop on July 31st. A preliminary inventory of climate change mitigation strategies was presented and participants were given the opportunity to provide their comments and feedback, as well as suggest priorities for implementation. Post-workshop, working with the volunteer Climate Ambassadors, the City continued to collect public feedback to help further inform strategy development and prioritization. The consultant team has since refined the inventory of strategies to call attention to those with the greatest impact potential (i.e., greenhouse gas emissions reduction) and highest costs. The City is keenly interested in receiving pubic feedback on these strategies through the EasyRetro tool. All strategies under consideration have been posted to the Portsmouth’s Climate Future website.

Lastly, the City has been working closely with the Rockingham Planning Commission to update regional transportation and population models. These models will provide results critical for forecasting future greenhouse gas emissions under a Business-As-Usual scenario.






As a coastal community with climate hazards becoming ever more present, the City of Portsmouth is engaging its community and other stakeholders in developing “Portsmouth’s Climate Future.” This effort will culminate in an Action Plan that will identify and phase targeted greenhouse gas (GHG) emissions reductions, avoidance, and removals at the municipal and community levels, while simultaneously identifying effective adaptation measures to make the City more resilient against future climate change impacts. With much of the City’s most treasured resources and many infrastructure assets located along its historic waterfront and directly vulnerable to sea level rise and storm surge, there is no time to wait. Portsmouth’s Climate Future will not only define and prioritize the actions needed from City staff and leadership, but will also call upon all those who live, work, and play in Portsmouth to make meaningful commitments to ensure it becomes a more climate friendly and resilient community for generations to come.


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