RNLI Issues Festive Safety Advice for Cold Water Dippers

Published On: 18 December 2025Last Updated: 18 December 2025By CornishStuff

With festive cold water dips becoming increasingly popular at Christmas and New Year, the RNLI is urging people to take safety seriously before getting in the water.

Water temperatures around the UK are currently between 6 and 10 degrees, conditions which can pose a real risk, particularly to those who are not used to cold water swimming.

Cold water shock a real concern

Emmie Seward-Adams, RNLI Water Safety Delivery Manager, said cold water shock remains one of the biggest dangers at this time of year.

She explained:
“Cold water dips have grown in popularity and for some have become a part of the annual tradition of Christmas and New Year celebrations, but with water temperatures in the UK around 6-10 degrees at this time of year, the risk of cold water shock is a concern, especially for those not acclimatised to the temperatures.”

Emmie added that anything below 15C is classed as cold water and should be treated with caution, particularly when combined with winter weather or existing health conditions.

“If it’s your first time in open water, we’d recommend you speak to your GP first, particularly for those with cardiac or under laying health conditions,” she said.

Advice for those heading into the sea

For anyone planning a festive dip, the RNLI says preparation is essential.

Emmie said:
“For those dipping in the sea, there are several precautions you can take to help ensure you have an enjoyable and safe time. Avoid swimming alone, consider going with others or joining a group or organised activity so you can look out for each other. Think about the depth of water and if you can, stay in your depth.”

She also stressed the importance of the right equipment, including wearing a bright swim cap to stay visible, using a tow float for emergencies and considering a wetsuit to increase warmth and buoyancy.

“Before swimming take a minute to let your body get used to the water. The initial effects of cold-water pass in less than a minute so don’t try to swim straight away,” she said.

What to do if things go wrong

The RNLI says even experienced swimmers can get into difficulty.

“The most important thing to remember is if you are in any doubt, stay out of the water and if you or anyone else does get into trouble in or on the water please call 999 or 112 and ask for the Coastguard,” Emmie said.

She added that taking a mobile phone in a waterproof pouch, along with a whistle, could be lifesaving.

“Even the well prepared can find themselves in difficultly but having the correct knowledge and equipment can save lives,” she said.

RNLI winter swimming safety tips

The RNLI has shared the following advice for anyone considering a winter swim or dip:

Be prepared. Check the weather forecast, including tides and wave height, by visiting the Met Office website. Take warm clothes for before and after, a hot drink, and a mobile phone in a waterproof pouch. Wearing a wetsuit can help reduce the risk of cold water shock.
Never swim alone. Go with a buddy to a familiar spot and tell someone when you expect to be back.
Acclimatise slowly. Walk in gently and wait until your breathing is under control before swimming.
Be seen. Wear a brightly coloured swim cap and consider using a tow float.
Stay in your depth. Know your limits, keep swims short and swim parallel to the shore.
Float to live. If you get into trouble, lean back in the water with arms and legs extended to regain control of your breathing.
Call for help. Dial 999 or 112 and ask for the Coastguard if you or someone else is in difficulty.
If in doubt, stay out. There will always be another day to swim.