Community Cold Plunge Groups Are Growing Across New Hampshire
On Saturday mornings throughout the winter, small groups of New Hampshire residents gather at lakes, rivers, and ocean access points along the Seacoast to voluntarily step into near-freezing water. What started as a niche practice among Wim Hof followers has grown into a broader wellness movement with organized groups in Portsmouth, Concord, Manchester, and the Lakes Region.
Why People Show Up
Talk to anyone who cold plunges regularly and you’ll hear a consistent theme: a rush of alertness followed by a calmer, elevated mood that lasts well into the day. That experience, more than any particular health claim, is what keeps people coming back. The social piece adds accountability and safety, making the practice more accessible than going it alone at the edge of Squam Lake in January. For residents managing seasonal mood dips in northern New England, that reliable morning lift is often the deciding factor.
Most groups keep things simple. Members submerge for two to five minutes, practice controlled breathing, then spend time rewarming together. Newcomers are encouraged to start at 30 to 60 seconds and build from there. Experienced members sometimes stay longer, but there’s no pressure.
What Research Shows
A 2025 systematic review and meta-analysis published in PLOS ONE examined eleven studies on cold water immersion in healthy adults. The authors found evidence suggesting benefits for stress, sleep quality, and quality of life, while noting that the current evidence base is limited by small sample sizes and few randomized controlled trials. They concluded that the picture is promising but not yet settled.
The mood boost people describe likely involves catecholamine release, including norepinephrine. Research reviewed in a 2017 paper by Tipton et al. in Experimental Physiology found plausible physiological mechanisms behind many commonly reported benefits, while also noting that some claims remain at the level of anecdotal evidence rather than controlled study.
The cardiovascular stress is real and worth taking seriously. Blood pressure spikes acutely during cold immersion, and people with pre-existing heart conditions face increased arrhythmia risk. Gradual adaptation matters. Jumping into 40-degree water on day one is not the recommended starting point. This same principle of gradual cold-weather conditioning applies broadly to staying active outdoors during a northern New England winter.
Finding a Group
The Seacoast Cold Plunge Collective meets at Odiorne Point State Park in Rye on Saturday mornings year-round. The Concord Cold Dippers use the Merrimack River access near Terrill Park. The Lakes Region group rotates between Squam Lake, Newfound Lake, and Lake Winnipesaukee depending on conditions — many of the same swimming holes popular for post-hike recovery in warmer months serve as cold plunge sites in winter. Most groups coordinate through Instagram or private Facebook groups and welcome newcomers.
If you’re in the state and curious, showing up once is the easiest way to decide whether it’s for you. The cold plunge community is one of several winter wellness gatherings active across the White Mountains region worth knowing about.
Sources
- Tipton MJ, et al. Cold water immersion: kill or cure? Experimental Physiology. 2017;102(11):1335-1355. Available at: physoc.onlinelibrary.wiley.com
- Effects of cold-water immersion on health and wellbeing: A systematic review and meta-analysis. PLOS ONE. 2025. PubMed ID: 39879231. Available at: pmc.ncbi.nlm.nih.gov/articles/PMC11778651/
This article is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before making any health decisions.
