Golf doesn’t look like hard work. But a round takes four to five hours, most of it on your feet, often in the sun, with a bag on your shoulder or a trolley to push. It’s also easy to forget to drink. You’re thinking about the next shot, the last three-putt, or whether to lay up.
82% of golfers we surveyed say their game drops off on the back nine or the last four holes (Hydracaddie customer survey, Sept 2026, 28 golfers). There’s no single reason for that. Fitness, food, focus and routine all play a part. Hydration is one of the easiest parts to get right, so here’s a simple plan.
Why hydration matters on the golf course
You lose fluid all round through sweat and breathing, more on warm days and hilly courses. The NHS lists feeling tired, dizzy or lightheaded, and a dry mouth among the signs of dehydration. None of those help over a 4-foot putt on the 17th.
The catch is that thirst isn’t an early warning. By the time you notice it, you’ve usually been behind for a while. The fix is to stop relying on thirst and drink on a schedule instead.
Before you tee off
Start before you leave the house. The American College of Sports Medicine suggests drinking slowly around four hours before exercise, roughly 5–7ml per kg of body weight. For an 80kg golfer that’s about 400–550ml, or a large glass or two with breakfast.
Then check the colour of your pee before you leave. Pale straw is what you’re after. If it’s dark, have another drink about two hours before your tee time.
Arriving at the first tee in good shape is much easier than trying to catch up on the 9th.
During the round: sip on a schedule
- Drink a little at every tee box. A few mouthfuls every hole is easier than gulping half a bottle at the turn, and it soon becomes a habit.
- Keep your bottle where you can reach it. If it’s buried in the bottom of your bag, you won’t bother. A 500ml Sports Bottle in the side pocket is easier to keep refilling.
- Use the halfway house to refill, not refuel on fizzy drinks. A sugary drink at the turn adds up fast. For what to eat alongside your drinks, see our 18-hole nutrition plan.
- Don’t overdo it. More isn’t always better. Drinking far more than you sweat can be harmful too. Steady and regular is the goal.
Hot days vs cold days
On a hot day, you’ll sweat more, so drink a bit more at each tee and refill at every opportunity. Shade, a hat and a wet towel all help.
In winter, you still lose fluid through layers of clothing and cold, dry air. You may also feel less thirsty in the cold, which makes the schedule even more important. A cold-weather round is often the one where golfers drink least.
Where electrolytes fit in
Sweat isn’t just water. It also contains electrolytes, mainly sodium, along with smaller amounts of potassium and others. For most rounds, water plus your normal meals covers this. On long, hot days or 36-hole days, many golfers add an electrolyte drink to their water.
If you’re choosing one, check the label for sugar. Some sports drinks contain 17g or more of sugars per bottle, and that adds up over 18 holes.
Hydracaddie Forest Fruits is a stick you mix into 500ml of water. It contains potassium, magnesium, vitamin C, vitamin B12 and zinc. It has no added sugar (it’s sweetened with stevia) and 2kcal per stick.
- Magnesium contributes to electrolyte balance.
- Potassium contributes to normal muscle function.
- Magnesium contributes to a reduction of tiredness and fatigue.
- Zinc contributes to normal cognitive function.
Want to try it before buying a box? The £6.99 sample pack has four sticks, enough for four rounds.
Go easy on alcohol and caffeine
A pint at the turn or a few on the 19th is part of the game for plenty of golfers. Alcohol makes you pee more, so you lose fluid faster. If you’re drinking, alternate with water. We cover this in more detail in Alcohol and Golf: Performance Impacts Every Golfer Should Know.
Your 18-hole hydration checklist
- A large glass or two of water with breakfast, roughly four hours before your round
- Check your pee colour before you leave: aim for pale straw
- Full bottle in an easy-to-reach pocket
- A few mouthfuls at every tee box
- Refill at the turn, ideally with water rather than a fizzy drink
- Drink a bit more on hot days, and stick to the schedule in winter too
- Alternate any alcohol with water
- Rehydrate after the round, especially before driving home
FAQs
How much water should I drink during a round of golf?
There’s no single number. It depends on your size, the weather, the course and whether you walk or ride. Small, regular amounts at every tee box work well for most golfers. Your pee colour after the round is a good check on whether you got it right.
Should I drink electrolytes while playing golf?
For a short or cool round, water and your normal meals are usually enough. On long, hot days or back-to-back rounds, many golfers add an electrolyte drink. If you do, check the sugar content on the label.
Can you drink too much water on the golf course?
Yes. Drinking far more than you sweat can be harmful. Aim for steady sips rather than forcing down large amounts.
Do I need to think about hydration in winter golf?
Yes. You still lose fluid in the cold, and you may feel less thirsty, so it’s easier to under-drink. Keep to the same tee-box routine.
Hydracaddie Forest Fruits is a food supplement. Do not exceed the recommended daily dose. Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. Keep out of the reach of young children.