Do I Need A Wetsuit?

Historically, the Thornapple River is in the mid-70’s. In 2014, it had a 10 degree jump in one week, and was recorded at 72 degrees on race day.

  • 2016 Race Day Water Temp – 73 degrees
  • 2017 Race Day Water Temp – 71 degrees
  • 2018 Race Day Water Temp – 69 degrees
  • 2019 Race Day Water Temp –  74 degrees
  • 2021 Race Day Water Temp –  76 degrees

Aquaman Wetsuits

The Most Comfortable And Non-Restricting Wetsuit You Can Buy.

We are proud to have Aquaman Wetsuits as our longtime wetsuit sponsor. Visit their website for a complete selection of their sleeved and sleeveless suits and other items.

You can also contact Emmanuel Millet directly for a special savings code for GRTri Athletes by emailing him at

For more information about the Grand Rapids Triathlon please contact us here.