Dehydration in Surfing

A shirtless man with dark hair and tan skin standing outdoors in a lush green tropical area, holding a blue water bottle to his mouth, with a pink and white surfboard strapped to his left side and a black watch on his left wrist. There are palm trees and dense greenery in the background under a cloudy sky.

Dehydration in Surfing: Prevention and Recovery

Long surf sessions, sun exposure, wetsuits, saltwater, and heat can quietly lead to dehydration — often before surfers even recognize symptoms.

Unlike many other sports, surfers may spend hours in the water without access to fluids, increasing the risk of both dehydration and fatigue.

Why surfers are at risk

Several factors contribute to dehydration during surfing:

  • prolonged sun exposure

  • sweating during paddling and exertion

  • heat trapped by wetsuits

  • inability to hydrate while surfing

  • saltwater exposure and occasional saltwater ingestion

Water reflection can also increase heat and UV exposure, particularly in tropical or high-UV environments.

Signs of dehydration

Common symptoms may include:

  • fatigue

  • headache

  • muscle cramps

  • dizziness

  • reduced energy or concentration

  • dry mouth

  • decreased performance in the water

Even mild dehydration can negatively affect endurance, reaction time, and decision-making.

Why this matters in surfing

Research has shown that fluid losses greater than approximately 2% of body weight may impair both physical and cognitive performance.[1][4]

For surfers, this matters because fatigue and slowed reaction time can affect:

  • paddling performance

  • decision-making

  • wave judgment

  • overall water safety

Hydration strategies for surfers

Helpful prevention strategies include:

  • hydrating before sessions

  • taking hydration breaks during long sessions

  • drinking fluids after surfing

  • combining fluids with food or electrolytes after prolonged exposure

  • monitoring urine color and recovery symptoms

Surfers spending long hours in tropical climates or wearing wetsuits may require additional fluid and electrolyte replacement.

Can you drink too much water?

Yes — overhydration can also become a problem.

Exercise-associated hyponatremia occurs when excessive water intake dilutes sodium levels in the body. Symptoms may overlap with dehydration and include:

  • nausea

  • headache

  • confusion

  • fatigue

In severe cases, it can become dangerous.

Current sports medicine recommendations generally favor drinking to thirst and avoiding excessive fluid intake beyond normal needs.[6][9]

From a Surfer + Medical Perspective

From a clinical perspective, dehydration can impair both physical performance and cognitive function — something especially important in the ocean where decision-making and reaction time matter. From a surfer’s perspective, it is surprisingly easy to underestimate fluid loss during long sessions, particularly in tropical climates or during surf travel.

Many surfers focus heavily on sun exposure but overlook hydration and recovery. Simple habits before and after surfing can make a major difference in performance, recovery, and overall safety in the water.

Explore Nutrition

References

  1. Thomas DT, et al. Med Sci Sports Exerc. 2016.

  2. Maughan RJ, et al. Nutr Rev. 2015.

  3. Harding AK, et al. J Water Health. 2015.

  4. Sawka MN, et al. Med Sci Sports Exerc. 2007.

  5. Roberts WO, et al. Curr Sports Med Rep. 2023.

  6. Jonas CE, Arnold MJ. Am Fam Physician. 2021.

  7. Kenefick RW. Sports Medicine. 2018