USA Triathlon Wetsuit Rules (Temperature Cutoffs Explained)

USA Triathlon has specific wetsuit rules based on water temperature. Here’s what you need to know to stay compliant and safe.

Temperature-based rules

Below 60°F (15°C): Wetsuits are required for all participants.
60–65°F (15–18°C): Wetsuits are optional but strongly recommended.
65–78°F (18–26°C): Wetsuits are optional.
Above 78°F (26°C): Wetsuits are prohibited (safety risk of overheating).

How races measure temperature

Official measurement: Taken 24–48 hours before race start.
Location: Usually measured at the swim start area, at depth (not surface).
Updates: Race directors may update rules if temperature changes significantly.

Age group vs. elite rules

Age groupers: Follow the temperature-based rules above.
Elite/professional: May have different rules (often no wetsuits allowed in warmer water for fairness).

Wetsuit specifications

Thickness: Maximum 5mm thickness for USA Triathlon events.
Coverage: Must cover torso; sleeves optional (full-sleeve or sleeveless both allowed).
Material: Neoprene or similar approved materials.

What happens if you break the rules

Too cold without wetsuit: You may be disqualified or not allowed to start.
Too warm with wetsuit: You may be disqualified or required to remove it before starting.
Check race rules: Always check your specific race’s rules, as some may differ slightly.

Race day preparation

Check race website: Temperature and wetsuit rules are usually posted 24–48 hours before.
Bring both options: If temperature is borderline, bring wetsuit and swimsuit.
Practice transitions: Know how to remove your wetsuit quickly if needed.

Safety considerations

Cold water: Below 60°F (15°C) without a wetsuit is dangerous. Don’t risk it.
Warm water: Above 78°F (26°C) with a wetsuit can cause overheating. Follow the rules.
Your comfort: Even if optional, choose based on your comfort and safety.

Using The Next Race

Log race details including water temperature and wetsuit use.
Track transition times to see how wetsuit removal affects T1.
Plan gear based on expected conditions and race rules.

Bottom line

USA Triathlon wetsuit rules are based on water temperature for safety. Below 60°F is required, above 78°F is prohibited, and in between it’s optional. Always check your specific race’s rules and measure water temperature before race day to prepare accordingly.