Open-Water Sun Protection and In-Water Skin Care: Don't Let Your Skin Be the Weakest Gear

Introduction

Open-water swimming enthusiasts in Taiwan often pay close attention to stroke technique, speed, and endurance, yet easily overlook the importance of skin protection. In fact, a 2-hour swim in Sun Moon Lake or a half-day training session in Penghu’s open waters can cause skin damage that may take a full week to recover from. Long-term neglect of sun protection is not just an aesthetic issue—it is a health risk.

Skin Threats in Open-Water Swimming

1. Ultraviolet (UV) Exposure:
Water surfaces reflect UV rays, exposing swimmers to a double dose of radiation—from above (direct sunlight) and below (surface reflection). Taiwan’s summer midday UV index can reach 10–13 (extreme to hazardous), with even higher readings in southern waters such as Penghu or Kenting. Water scattering also allows UVA to penetrate up to 1 meter below the surface.

2. Chafing:
During prolonged swimming, the edges of swimwear, goggle straps, and wetsuit neck collars continuously rub against the skin, causing redness, swelling, and even abrasions. The most common affected areas are: the neck (wetsuit collar), armpits, and inner thighs.

3. Saltwater Irritation:
If you do not rinse off with fresh water after swimming in the sea, residual salt will continue to irritate the skin, causing dryness and cracking—particularly around the lips and eyes.

4. Chlorine and Algae:
Some open-water locations (especially Taitung’s Living Lake in summer) may experience algae accumulation, and certain types of algae can trigger allergic skin reactions.

Choosing Sunscreen Products

The sun protection needs for open-water swimming are highly specific, and regular facial sunscreen is simply not sufficient:

Selection Criteria:

• SPF 50+ or higher, PA+++ or higher (or labeled “Broad Spectrum”)
• Labeled “Water Resistant 80 minutes” or longer
• Mineral ingredients (zinc oxide / titanium dioxide) offer better water resistance than chemical ones
• Sunscreen sticks are easier to apply precisely on the face, ears, and lips than lotions

Application Timing:
Apply 20–30 minutes before entering the water to allow the sunscreen to fully bond with the skin. Reapply every 2 hours (if there are opportunities during rest breaks).

Preventing and Treating Chafing

Preventive Measures:

• Apply petroleum jelly or sports lubricants such as BodyGlide to friction-prone areas (armpits, neck, inner thighs) before swimming to form a protective barrier once in the water.
• Choose goggles with softer straps and ensure the strap is not too tight.
• Apply lubricant to the inside of the wetsuit neck collar as well, especially for long-distance swims.

Treating Existing Chafing:
After swimming, rinse the wound with clean water first, then apply antibacterial ointment (such as diluted povidone-iodine). Avoid going back into the water before the wound has healed.

Post-Swim Skin Care

• Rinse and Clean: Rinse your entire body with fresh water as soon as possible after swimming (especially after sea swimming) to remove salt and any residual algae.
• Moisturize: Apply moisturizing lotion immediately after rinsing, as swimming strips the skin of its natural oils.
• Lip Care: Chapped lips are very common after long sea swims. Carry a lip balm with SPF and use it both before and after entering the water.
• Eye Care: If you experience eye irritation after swimming, rinse with preservative-free artificial tears.

Practical Tips

• For open-water training during Taiwan’s summer (May–September), consider wearing a long-sleeve UPF 50+ swim shirt to reduce reliance on sunscreen, offering more stable and longer-lasting protection.
• Sun reflection in Penghu waters is especially intense—be sure to apply sun protection to the back of your neck and behind your ears as well.
• If you are allergic to chemical sunscreen ingredients, choose a purely mineral sunscreen stick (containing only zinc oxide), which is the least irritating.
• Check your skin in the mirror after every swim and keep a “skin diary” to understand how your skin reacts to different bodies of water.

Conclusion

Your skin is your largest organ and the most directly exposed “gear” in open-water swimming. Invest in a good waterproof sunscreen stick, develop the habit of applying lubricant before swimming and moisturizing after, and your open-water career will not only be fast—it will be healthy.

Related Reading

• Sun Protection and Skin Care for Open-Water Swimming: Strategies for Prolonged Sun Exposure
• Open-Water Visibility and Water Temperature: Two Key Challenges to Know Before Getting In
• Swimming Skin Issues: Chlorine Allergies, Dry Skin, and Moisturizing Strategies
• Post-Swim Skin Care: Preventing Chlorine Damage and Moisture Repair