Ever watch an old black-and-white clip of Jack Nicklaus or another tour pro crouching down, holding their putter up like a surveyor's tool before a big putt? That's plumb bobbing, an old-school green reading technique that helps you see gravity's true influence on your golf ball. This article will show you exactly what plumb bobbing is, why you might want to try it, and provide a clear, step-by-step guide to doing it yourself on the course.
In its simplest form, plumb bobbing is a method for reading the break of a putt by using your putter as a plumb line. A plumb line, used for centuries in construction, is a weight suspended from a string that gives you a perfectly true vertical line. On a putting green, this principle allows you to see the green’s slope in relation to that perfect vertical.
By letting your putter hang freely, you create your own plumb line. You can then use the shaft as a visual reference point against the background of the hole. Because you know the putter is hanging perfectly straight down, any deviation of the hole to the left or right of the shaft reveals the general direction of the break. You’re not guessing about the slope anymore, you're using a simple tool to give you a clearer picture.
Think of it this way: your eyes and feel can sometimes be deceived by subtle contours, background slopes, and grain. The plumb bob technique gives you an objective, physical representation of "straight down," making it easier to see which way the ground is tilting.
While newer green-reading systems like AimPoint have gained popularity, plumb bobbing remains a valuable skill, especially for amateurs. It doesn't require any special apps or training, and the only piece of equipment you need is already in your hand.
Here are a few reasons to add it to your pre-putt routine:
Ready to try it? The technique is straightforward once you get the hang of it, but getting the details right is important for an accurate read. Follow these steps:
Start your green reading process as you normally would. Stand a few feet directly behind your ball, in line with the hole. Crouch down and try to feel the slope with your feet. Take in the overall picture. Does it look uphill or downhill? Do you already sense a general left or right break? This initial feel provides important context for your plumb bob read.
Walk about halfway to the hole, and stand on the low side of the putt if possible. For example, if you think the putt breaks from right to left, you would stand to the right of your ball-to-hole line, facing it. This vantage point gives you the best perspective.
Now, here's how to hold the putter. Don’t grip it like you’re making a stroke. Use your thumb and index finger to lightly pinch the very top of the grip. The key is to let the putter head’s weight allow the shaft to hang completely vertical, free from any influence from your hand. Let it become motionless.
Pro Tip: Ensure your putter is balanced. Some putters are face-balanced or toe-hang balanced, but as long as you let the head settle and the shaft hangs straight down from your hand, the principle works.
For this to work, you need to turn your three-dimensional view into a two-dimensional one. To do this, close one of your eyes.
Which eye should you close? You'll want to use your dominant eye. To find it, form a small triangle with your hands and, with both eyes open, center a distant object within that triangle. Now, close your left eye. If the object stays centered, you’re right-eye dominant. If it jumps out of the triangle, you’re left-eye dominant. Close your non-dominant eye for this technique.
With your dominant eye open, position yourself so the vertical putter shaft completely covers or bisects the golf ball. The bottom tip of the putter shaft should appear to be touching the top of the ball. You have now established your true vertical line of reference, starting directly from your ball.
This is the moment of truth. With the putter shaft lined up over your ball, look where the hole is in relation to the shaft.
The further the hole appears from the shaft, the more break you’ll have to play. This doesn't tell you the exact speed or line, but it confidently tells you the direction of the dominant slope from your position.
If you're getting confusing reads, you might be making one of these common mistakes:
You may not see as many tour pros plumb bobbing on a Sunday afternoon as you once did. Methods have evolved, and an entire industry has sprung up around green-reading systems. So is it outdated?
For the average golfer, absolutely not. Plumb bobbing is a "feel" technique at its heart. It trains you to see slopes and understand how gravity shapes a putt's path. While it may not give you a precise aiming point down to the inch, it excels at giving you the general "story" of the putt, especially when you're feeling indecisive. It's a powerful tool for visual learners and an excellent way to ground yourself in a consistent, repeatable routine. Treat it as one part of your overall green-reading process, combining its information with what your feet and eyes tell you.
Plumb bobbing is an excellent, time-tested technique for diagnosing the break of a putt without any gadgets or gizmos. By using your putter to find a true vertical line, you can cut through visual confusion and gain a clearer understanding of the slope, allowing you to make a more confident and committed stroke.
As you build these traditional skills, remember that modern tools can help you take your game to the next level. When my students struggle with course management or tricky on-course decisions, I introduce them to platforms that give them that "caddie" voice in their pocket. For example, if you use a tool like Caddie AI, you can get instant strategic advice right on the course. Whether it's analyzing a difficult lie or suggesting the smartest way to play a challenging par-4, having a second, expert opinion helps remove the guesswork, letting you play with more confidence and clarity.
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