IRONMAN Texas
The Woodlands, United States · usually held in April
Lake swim · wetsuit rule depends on the day
Climbing not published: check the official course profile.
Hot or humid conditions
IRONMAN Texas is a Full / 140.6 triathlon in The Woodlands, United States, usually held in April. Below are the swim, the bike course and the typical conditions around race day, and what they mean for your gear and fueling. Sources are listed at the bottom of the page.
Racing it
The swim
The swim is in a lake. The average water temperature around race day is about 23.3°C (74°F). Whether wetsuits are allowed depends on the water temperature on race day, so bring one and check the announcement on the morning.
The bike
We haven’t found a published climbing figure for the bike course, so check the course profile in the official athlete guide before you choose your bike and gearing.
Conditions and fueling
Around race day, air temperatures typically run from about 12.9°C (55°F) to a daytime high of about 26°C (79°F). By our rule of thumb that’s hot or humid: plan extra fluid and sodium with the Race Nutrition Calculator, and practise drinking on the bike.
FAQ
Is IRONMAN Texas wetsuit legal?
It depends on the water temperature on race day. Bring a wetsuit and check the announcement that morning.
How warm is the water at IRONMAN Texas?
The average water temperature around race day is about 23.3°C (74°F). It varies year to year, so check the official update in race week.
Your race, tool by tool
Pack the wetsuit, decide on race morning
Typical water temperature is in our “warm” band: check the race’s wetsuit rule, and consider a sleeveless suit or swimskin.
Find a wetsuit for this water →Check the course profile
The climbing isn’t published, so look at the official course profile: flat courses favour aero, hilly ones gearing.
Clip-ons or tri bike? →75g carbs · 900mg sodium · 950ml fluid an hour
Calculated for a mid-pack, average-sweat 70–80 kg athlete in these conditions (finish around 12:12). Make it yours in the calculator.
Personalise my fuel plan →Race checklist, pre-filled
Distance, swim and forecast already set for this race.
Open my checklist →Your race-day watts and paces
Enter your FTP, threshold pace or heart rate and get targets for this race’s distance and conditions.
Plan my pacing →Conditions are typical, not a forecast. Wetsuit rules, course and aid stations can change: always check the official athlete guide.
Sources: www.endurancesportswire.com, www.endurancesportswire.com, www.endurancesportswire.com, www.ncei.noaa.gov, www.upi.com · water temperature: www.upi.com · facts checked 2026-11-02