Water and hydration
How much water should I bring on a hot walk with my dog?
Last updated 23 September 2026 · How we write and check this
Short answer
As a rough guide, bring at least 250 ml (8.5 fl oz) of water per 10 kg (22 lb) of body weight for every 30 minutes of walking in hot weather, so a 20 kg dog on a one hour hot walk would need roughly 1 liter (34 fl oz). Bring extra rather than exactly enough, since heat and pace both affect actual needs.
Working out a rough amount
Scale from body weight and walk length: a 10 kg dog on a 30 minute hot walk might need around 250 to 300 ml, while a 30 kg dog on a 90 minute hot walk could need close to 1.5 liters. Uphill terrain, direct sun, and a faster pace all push the real number higher.
Why bringing extra matters
Running out of water mid-walk on a hot day removes your ability to respond if your dog starts panting heavily or seems to be struggling, so carrying more than the calculated minimum gives a useful safety margin.
How to offer it during the walk
Offer water every 15 to 20 minutes rather than waiting for your dog to show signs of struggling, using a collapsible bowl that packs flat in a bag. Choose shaded rest stops for these water breaks when the route allows it.
Key takeaways
- Roughly 250 ml per 10 kg of body weight per 30 minutes is a useful starting guide.
- Uphill routes, direct sun, and faster pace all raise the real requirement.
- Carrying extra water gives a margin against underestimating.
- Offering water every 15 to 20 minutes works better than waiting for signs of thirst.