A significant number of variables come into play when putting green speed is measured. Some variables, most notably the weather, are uncontrollable. However, you can control how you conduct the test and using a consistent approach will help you collect the most accurate and actionable data possible. The following are some small details that can make a big difference in the quality of your green speed measurements.
Location, Location, Location
Putting green speeds should be measured in the same location each time. A simple strategy to help with this is to mark the start and end points of your Stimpmeter test locations with a permanent marker. The distance between the marks should be the target green speed. These marks will need to be freshened up from time to time so they are not lost.
Line It Up
When setting up for a roll, line up the seam of the golf ball with the seam of the Stimpmeter. If the ball sounds like it is rattling as it rolls down the Stimpmeter, there is a good chance it is not lined up correctly and may be rolling a shorter distance than if it were lined up properly.
Timing Matters
The timing of when putting green speeds are measured matters. Ideally, check speeds at least 30 minutes after the last surface management practice is performed and when there is minimal moisture on the surface. Recording a speed too soon after mowing or rolling will result in an inflated number while even a small amount of surface moisture will slow ball roll.
Proper Technique
Raising the Stimpmeter slowly and pausing when the ball releases is critical in ensuring an accurate test. Raising the Stimpmeter too fast or too high will result in inflated speeds. The Green Section Record article “The Impact of Technique and Tools on Green Speed Measurements” highlights how important technique is when measuring putting green speed and how advancements in technology can be used to record more-accurate putting green metrics.
Measuring putting green speed is not a perfect science due to the many variables that can impact data collection from day to day. However, focusing on the details that can be controlled will result in more-accurate results over time. Check out the USGA video “How To Measure Green Speed With a USGA Stimpmeter” for an in-depth demonstration of how to perform this test. For more information on green speeds and data collection, reach out to your regional USGA agronomist.
Central Region Agronomists:
Zach Nicoludis, regional director – znicoludis@usga.org