Key takeaways
- ✓Temperature: beginners 12–15°C, intermediate 8–12°C, advanced 3–8°C.
- ✓Time: 1–3 minutes per session; start at 60 seconds.
- ✓Frequency: 2–4 times a week — about 11 minutes of cold weekly.
- ✓Colder is not better; it just cuts how long you can safely stay.
- ✓A chiller holds the temperature steady so every session is the same.
Two questions come up before every first plunge: how cold, and how long. The honest answer is that you need far less than people think. You do not have to sit in near-freezing water for ten minutes to get the benefit. Here is the simple version.
How cold should it be?
Pick a temperature you can stay calm in, not the lowest number you can survive. As a rough guide:
| Level | Temperature | Feel |
|---|---|---|
| Beginner | 12–15°C | Brisk, manageable |
| Intermediate | 8–12°C | Properly cold |
| Advanced | 3–8°C | Sharp — short stays only |
Below about 10°C the extra benefit is small, while the discomfort and risk climb. Most regular plungers settle around 8–10°C and stay there. There is no prize for going colder.
How long should you stay?
One to three minutes covers it. Start at 60 seconds and add time slowly as the cold stops feeling like a shock. Past three minutes you gain little, and the colder the water the shorter you should stay. Get out if you start shivering hard or feel light-headed — that is the signal, not a target to push through.
How often?
Two to four times a week works for most people. A useful rule of thumb from the research is around 11 minutes of deliberate cold a week in total. That might be four three-minute dips, or six shorter ones. You do not need to plunge every day, and rest days are fine.
A simple four-week progression
- Week 1: 15°C, 1 minute, twice.
- Week 2: 12°C, 90 seconds, three times.
- Week 3: 8–10°C, 2 minutes, three times.
- Week 4: 5–8°C, 2–3 minutes, three to four times.
Our beginner's guide walks through this in more detail, including breathing and warming up afterwards.
Staying safe
Never plunge alone when you are new to it. Warm up gently afterwards — move around rather than jumping straight into a hot shower. If you are pregnant, have a heart condition or any medical concern, check with your GP first.
Holding a steady temperature
The hard part at home is keeping the water where you want it. With bagged ice it starts cold and drifts up as the ice melts, so no two sessions feel the same. A chiller holds whatever you set, day after day, which makes building a routine far easier. If you are choosing between the two, the chiller vs ice guide lays out the trade-offs.
In one line: aim for 8–12°C, one to three minutes, a few times a week. Consistency beats cold. Ready to set up? See our tested pick of the best ice baths.
Frequently asked questions
How cold should an ice bath be?+
For most people, 10–15°C is plenty. Beginners should start around 15°C; experienced plungers go to 3–8°C. Colder is not better — it just shortens how long you can safely stay.
How long should you stay in an ice bath?+
One to three minutes is enough for most benefits. Beginners can start at 60 seconds. There is little reason to stay beyond three minutes.
How often should you ice bath?+
Two to four sessions a week suits most people. The research points to around 11 minutes of cold a week in total, so you do not need long or daily dips.
Is a colder ice bath more effective?+
Not really. Below about 10°C the extra benefit is small, while the risk and discomfort rise. Consistency matters more than chasing low numbers.
How do I keep the temperature steady?+
A chiller holds whatever you set automatically. With ice the water drifts as it melts, so a chiller gives the most repeatable sessions.