Lake Windermere draws hundreds of thousands of visitors each year with its clear waters and stunning mountain views.
Wild swimming in the lake is increasingly popular, yet the lake has cold temperatures and other more serious risks that need to be considered before taking a dip.
This post covers all the important factors you need to know for a safe and enjoyable swim in this famous Lake District lake.
Can You Swim in Lake Windermere?
You can swim in Lake Windermere. It is a popular spot for open water dips.
Many people enjoy short swims or longer challenges depending on their fitness levels.
The lake spans 10.5 miles, the longest in England. No lifeguards patrol the shores, so plan with care.
It is wise to check local updates before you go, as conditions change.
Related: Shopping in Windermere
Issues With Sewage in Lake Windermere
Sewage spills affect Lake Windermere. In 2024, United Utilities released untreated waste on over 140 days, with similar issues this year.
This leads to high bacteria levels, especially in summer. The Big Windermere Survey found poor bathing quality across most of the lake from June to September.
Avoid swimming after heavy rain when spills rise. Groups like Save Windermere push for cleaner water.
Safety Tips for Swimming
Stay safe by swimming with a friend. Wear a bright cap and tow a float to stay visible to boats.
Enter the water slowly to avoid cold shock. Check weather forecasts for wind or rain. Do not swim alone or after alcohol.
Walk in first to test depth and currents. If you feel tired, float on your back. Call 999 if in trouble.
Related: Things to Do in Windermere at Night
Good Places to Swim
Pick calm spots for your swim. Fell Foot Park at the south end has grassy areas and easy entry, run by the National Trust with facilities.
Millerground near Bowness offers pebbly shores and parking.
Borrans Park in Ambleside suits longer swims with open water.
Low Wray and Harrowslack provide quieter bays. Avoid busy boat lanes.
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Where to Stay Near Lake Windermere
Laik provides luxury self-catering holiday cottages and apartments close to Lake Windermere.
These stays offer comfort and quick access to swimming spots and lake views.
Choose from options that suit couples, families, or groups, with modern amenities for a relaxing base after your dip.
Average Water Temperatures
Water in Lake Windermere stays cold year round.
In summer, it reaches 14 to 15°C in July and August. Spring averages 8.1°C, autumn around 11°C, and winter drops to 4.9°C.
A wetsuit helps in all seasons. Warmer months feel best for most swimmers.
Wildlife to Watch Out For
Watch for blue-green algae, which forms blooms and causes skin rashes or stomach issues.
In 2025, levels exceeded safe limits in parts of the lake.
Bacteria from sewage pose infection risks if you swallow water.
Birds like swans can act protective near nests.
Fish and midges are common but not harmful.
Check for algae warnings before entering.
Water Quality and Monitoring
The Environment Agency and groups like the Freshwater Biological Association monitor the lake.
The 2025 Big Windermere Survey tested over 1,000 samples and rated summer quality as poor due to bacteria.
Phosphorus levels are good in some basins, but algae blooms persist.
Check the Love Windermere site for real-time data. Improvements are underway to reduce pollution.
Best Times to Swim
Swim in summer from June to August when water warms up. July and August offer the highest temperatures around 15°C.
arly morning or late afternoon avoids crowds and boats.
Spring and autumn suit experienced swimmers, but winter dips are for the hardy.
Rules and Regulations
Follow Lake District rules to protect the area. Swim in designated spots and yield to boats.
No diving from shores in Windermere Byelaws areas. Do not litter or disturb wildlife.
Private land surrounds parts of the lake, so stick to public access.
Events need permits. Respect other users like rowers.
What to Pack for a Swim
Pack a wetsuit for warmth, plus goggles and a swim cap. Bring a towel, dry robe, and flip-flops.
A tow float and buddy line aid safety.
Add sun cream, water bottle, and snacks.
First aid kit covers cuts from rocks. Waterproof bag keeps clothes dry.
Organised Swimming Events
Join events for guided swims. The Great North Swim in June 2025 at Brockhole offered distances from 250m to 10k.
Epic Lakes Swim Windermere in August 2025 had 750m to 5k options.
Chillswim end-to-end challenges cover the full length.
Check sites for 2026 dates. These provide support and marshals.
Health Advice Before Swimming
See a doctor if you have open wounds or health issues. Do not swallow lake water to avoid bacteria.
Shower after to rinse off algae or pollutants.
Watch for rashes or tummy upset post-swim. Stay hydrated and eat well.
Build cold tolerance if new to open water.
Environmental Considerations
Help keep the lake clean by leaving no trace. Pick up litter and use bins. Avoid soaps in the water. Report spills to the Environment Agency.
Support campaigns like Love Windermere.
Sustainable choices protect this beauty for others.
Nearby Facilities and Access
Access points have parking at Fell Foot and Borrans Park. Changing rooms and toilets available at National Trust sites.
Buses run to Bowness and Ambleside. Cafes nearby serve food after swims. Rent gear from local shops like Swim The Lakes.
Winter Swimming
Winter swimming in Lake Windermere appeals to hardy swimmers seeking a challenge.
Water temperatures fall to around 5°C from December to February, with shorter days and possible frost.
Use a full wetsuit, neoprene gloves, hood, and boots to stay warm.
Enter the water gradually to prevent cold shock, and keep swims brief at 5 to 10 minutes to avoid hypothermia.
Always go with others, have hot drinks and dry layers ready on shore, and monitor for signs of distress.
Calm spots like Fell Foot Park suit winter dips, but check for ice edges or high winds. Build up tolerance gradually and consult a doctor first.
About Lake Windermere
Lake Windermere lies in the Lake District National Park in Cumbria. It measures 10.5 miles long and up to a mile wide, making it the largest natural lake in England.
Glaciers shaped the area thousands of years ago, leaving deep waters that reach 219 feet at the deepest point.
The lake feeds into the River Leven and borders villages such as Bowness-on-Windermere and Ambleside.
Surrounded by fells and woodlands, it supports boating, fishing, and swimming. Over 15 million visitors come each year to enjoy its views and activities.
Some Final Notes On Wild Swimming in Windermere Lake
Swimming in Lake Windermere rewards with stunning scenery, but safety and water quality matter most.
Follow tips and check updates for a great experience. Book a stay with Laik.co.uk to base your Lake District trip near the water.
