Best Wild Swimming Apps and Maps for UK Swimmers
Whether you’re after a tucked-away river pool in the Lake District, a sea loch in the Scottish Highlands, or a limestone gorge in the Wye Valley, finding reliable information about wild swimming spots in the UK used to mean word of mouth, dog-eared guidebooks, and a fair bit of trial and error. Thankfully, that’s changed considerably. A solid collection of apps, maps, and online resources now exists specifically for UK open water swimmers — and knowing which ones are actually worth your time can make the difference between a brilliant swim and a wasted afternoon standing on a muddy bank with no idea where to get in.
This guide covers the best tools available right now for discovering, planning, and swimming safely in UK waters — from dedicated wild swimming apps to OS maps, water quality data, and community platforms. We’ve also included some important notes on safety and access rights, because a good swim is a safe swim.
Why Good Maps and Apps Matter for Wild Swimming in the UK
Wild swimming in the UK sits in a somewhat complicated legal and practical landscape. Unlike in Scotland, where the Land Reform (Scotland) Act 2003 grants a general right of responsible access to most land and water, England and Wales operate under much older and patchier access laws. Most rivers and lakes in England and Wales are privately owned, and there is no universal right to swim in them. This makes reliable, community-sourced information about access points, landowner attitudes, and local etiquette genuinely important — not just convenient.
Beyond access, water quality varies enormously across the UK. A spot that’s crystal clear after a dry week can look very different after heavy rainfall brings agricultural runoff or sewage overflows into the catchment. Apps and platforms that integrate Environment Agency data or community water quality reports are genuinely useful tools, not just extras.
Then there’s the practical side — parking, footpaths, entry and exit points, depth, current, and hazards. A good app saves you time and keeps you safer. So let’s get into the ones that are actually worth downloading.
Wild Swimming Apps Specifically Built for UK Swimmers
Wild Swimming — The App (by Outdoor Swimming Society)
The Outdoor Swimming Society (OSS) is one of the most respected organisations in UK open water swimming, and their associated app and online map is one of the first places most UK swimmers go when looking for new spots. The OSS has been championing outdoor swimming in the UK since 2006 and has built up one of the most comprehensive community databases of swim spots in the country.
The OSS map on their website (outdoorswimmingsociety.com) allows you to search by location, type of water (river, lake, sea, lido), and other filters. Entries are submitted and reviewed by community members and include photos, descriptions, access notes, and sometimes safety information. It’s not a slick tech product — it’s a community resource — and that community knowledge is genuinely its strength.
Tip: Always check when an entry was last updated, and read the comments section carefully. A spot that was a well-kept secret three years ago might now have a car park and a No Swimming sign.
Wild Swim Map
WildSwimMap.co.uk is a straightforward, no-fuss map of wild swimming locations across the UK and Ireland. It’s browser-based rather than an app, but it’s mobile-friendly and easy to use on a phone. Locations are pinned on a Google Maps base layer, and each entry includes a description, directions, and often a photo or two.
The database isn’t quite as large as the OSS’s, but the entries tend to be well-written and practical. It’s particularly good for finding coastal and sea swimming spots around England and Wales. If you’re heading to Cornwall, Devon, Pembrokeshire, or the north Norfolk coast for the first time, it’s well worth a browse before you leave home.
Swimzi
Swimzi is a newer platform that has grown a strong following among UK open water swimmers. It functions as both a social network and a location discovery tool, letting swimmers log their swims, share photos, follow other swimmers, and discover new spots through the community feed. Think of it as a blend of Strava and a wild swimming forum, with a map attached.
The app (available on iOS and Android) includes a map view of swim spots contributed by the community, and each swim you log can be tagged with a location. Over time, popular spots accumulate a useful body of reports — different seasons, different water levels, different conditions — which gives you a much richer picture than a single static entry ever could.
Swimzi also has an active community around events and group swims, which is worth knowing if you’re new to wild swimming and not yet confident going solo.
General Outdoor Apps That Wild Swimmers Use
OS Maps (Ordnance Survey)
For serious planning of wild swimming trips anywhere in the UK, OS Maps is indispensable. The Ordnance Survey 1:25,000 Explorer maps are the gold standard for understanding terrain — they show footpaths, access land (shown in yellow shading), rivers, lakes, rights of way, and the precise nature of the ground you’re navigating.
The OS Maps app (available for iOS and Android, with a subscription required for full offline use) lets you download maps for offline use, plan routes, and drop pins on locations. For wild swimmers, it’s particularly useful for identifying access land near water, spotting footpaths that lead to riverbanks, and understanding the wider landscape around a potential swim spot — things like whether there’s a road crossing upstream that might indicate pollution risk, for example.
If you’re heading into more remote areas of Scotland, the Lake District, Snowdonia (now officially Eryri), or the Peak District, having OS maps downloaded for offline use is a genuine safety measure, not just a planning tool.
What3Words
What3Words divides the world into 3m x 3m squares and assigns each a unique three-word address. It’s become standard in many UK outdoor pursuits as a way to communicate precise locations, particularly useful if you need to call the emergency services and can’t easily describe where you are.
If you’re swimming in a remote location — a mountain tarn in the Lake District, a sea cave in Orkney, a river gorge in Mid Wales — noting the What3Words address of your entry and exit points before you get into the water takes about ten seconds and could be critical in an emergency. RNLI and Mountain Rescue teams across the UK actively use What3Words, and HM Coastguard can receive What3Words locations directly.
Google Maps and Apple Maps
Obvious as it sounds, Google Maps and Apple Maps are genuinely useful tools for wild swimming reconnaissance. Satellite view allows you to assess swim spots visually before visiting — you can see bank access, depth clues from colour, nearby features, and whether a spot has any infrastructure. Street View can sometimes give you a preview of a car park, a lane access point, or a footpath entrance.
Neither is a substitute for a proper OS map for navigation, and neither will tell you about access rights or water quality. But for a quick visual check before committing to a drive, they’re hard to beat.
Water Quality Apps and Resources
Water quality is one of the most important — and most underused — categories of information for UK wild swimmers. Here’s what you need to know.
Environment Agency Bathing Water Quality
The Environment Agency (EA) monitors designated bathing waters in England and publishes water quality data on their website. The EA’s Swimfo tool (available at environment.data.gov.uk/bwq/profiles) lets you look up any designated bathing water in England and see its classification (Excellent, Good, Sufficient, or Poor) along with current and historical data.
The key word here is “designated” — there are around 420 designated bathing waters in England, mostly coastal but with some inland sites. This covers only a fraction of where people actually swim. If your favourite river spot isn’t designated, you won’t find it on Swimfo.
Natural Resources Wales runs equivalent monitoring for Welsh bathing waters, and SEPA (Scottish Environment Protection Agency) covers Scotland. The data is publicly available on their respective websites.
Surfers Against Sewage — Safer Seas and Rivers Service
Surfers Against Sewage (SAS) runs arguably the most swimmer-friendly water quality resource in the UK: the Safer Seas and Rivers Service (SSRS). Available as an app and on their website (sas.org.uk), the SSRS displays real-time sewage overflow alerts for thousands of locations around UK coasts and inland waterways.
When a water company reports that a Combined Sewer Overflow (CSO) has been activated — which happens when storm drains and sewage pipes exceed capacity, often during or after heavy rainfall — the SSRS flags the nearest swim spots as potentially affected. The service covers over 5,000 locations and is updated continuously during the swimming season.
For swimmers concerned about water quality — and given the ongoing issues with sewage discharge in UK rivers and coastal waters, that should be all of us — the SAS app is probably the single most useful safety tool available. It won’t cover every swim spot, but it gives you a much clearer picture of conditions around designated sites and can inform your decisions about when to swim and when to stay out.
Windy and Weather Apps
Windy (windy.com) is a sophisticated meteorological visualisation tool widely used by sailors, surfers, and other outdoor water users. For wild swimmers, it’s particularly useful for coastal and sea swimming — you can check swell height, wind direction, tidal conditions, and weather patterns up to ten days ahead. The free version is excellent, and the interface is intuitive once you’ve spent a few minutes with it.
For river swimming, standard weather apps are arguably more important — specifically, rainfall data. Heavy rain upstream of your swim spot can dramatically change flow rates, turbidity, and flood risk even if the weather where you are is perfectly pleasant. The Met Office app is reliable and includes rain radar, which lets you track recent and incoming rainfall across the catchment above your planned swim location.
Moving Forward
Once you have the fundamentals in place, the possibilities open up considerably. The UK offers fantastic opportunities for anyone interested in this hobby, and with the right foundation you will be well placed to make the most of them.
