Dog owners are being urged to exercise caution when allowing their pets to swim in natural bodies of water due to hidden hazards beneath the surface. Recent data from the Canal & River Trust reveals that incidents involving dogs in water reached a five-year peak in 2025, with a 39 per cent rise compared to the previous year.
This alarming increase may be even greater in 2026, given the exceptionally hot and dry weather prompting more owners to take their dogs to cool off in rivers, lakes and canals. The Dogs Trust highlights a common misconception among pet owners, stating that although 74 per cent believe they can identify safe water for their dogs, no open water should be assumed safe without proper checks.
Potential dangers to dogs include pollutants, strong currents, exposure to toxic blue-green algae, risks of cold-water shock, and problematic exit points that can trap animals in the water.
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Jennifer Craig, who lives in Somerset, recounted her devastating experience after losing her dog Luna soon after a swim in a local river. Hoping to provide relief from the heat-especially since hot road surfaces were unsafe for Luna’s paws-Jennifer visited what she thought was a safe, nearby river spot. Tragically, Luna developed a severe stomach illness after paddling and passed away shortly afterwards.
“We didn’t think anything of it at the time,” Jennifer said. “We just thought this was the best place to cool her down. We couldn’t take her on long walks or on roads because it was too hot, so going down to the river for some exercise seemed ideal. Losing her so suddenly was incredibly painful for all of us.”
To help prevent similar tragedies, the Dogs Trust offers advice for finding safe swimming spots for dogs. Emily Mills of the organisation emphasises the need for vigilance: “We want dog owners to be cautious every time. Even if it’s a place you know well, check conditions on every visit. Make sure your dog can safely get in and out of the water. Look out for signs of blue-green algae, warning notices, local wildlife like swans, and any hidden dangers beneath the surface.”
Owners are reminded that safety must always come first when it comes to their pets enjoying the outdoors, particularly during hot weather when water offers tempting relief but also potential hazards.
“We just thought this was the best place to cool her down. Losing her so suddenly was incredibly painful for all of us.” – Jennifer Craig