Wet suction part 1: how water slows your ski
A thin water film can make your ski faster. Too much water, however, creates wet suction and costs speed. In this first part, you will learn how wet suction occurs and why Ski Wax, Ski Waxing and base structure are so important in moist snow.
What does wet suction mean?
Wet suction occurs when there is too much water between ski base and snow. This water no longer acts only as a gliding film, but can create a suction effect. The ski sticks more strongly to the snow surface and loses speed.
Especially in warm, moist or wet snow, wet suction can be one of the most important braking factors. That is why the right base structure and suitable Ski Wax are decisive.
Why water is not always bad
A very thin water film is actually helpful for fast glide. It reduces direct contact between snow crystals and the base. The ski runs more freely because less dry friction occurs.
It only becomes problematic when this water film becomes too strong. Then the contact effect between ski and snow increases. Glide water turns into braking water.
Too little water
In very cold, dry snow, dry snow friction dominates. The ski can feel hard and dull.
Optimal water film
A thin film reduces friction and supports the ski’s glide performance.
Too much water
In wet snow, a suction effect can develop. The ski loses acceleration and speed.
How does the water film form under the ski?
When gliding over snow, pressure, friction and heat are created. This can form a fine water film at the contact surface between base and snow. This film is extremely thin, but it massively influences glide performance.
The warmer and moister the snow is, the more easily excess water forms. Heavily skied snow, spring snow or wet artificial snow can also create conditions where wet suction becomes clearly noticeable.
Why wet suction costs speed
Wet suction works similarly to two moist, smooth surfaces that stick to each other. The water between the surfaces creates additional resistance. For the ski, this means the base no longer releases freely from the snow surface.
The result is a ski that no longer accelerates cleanly on flat sections and feels sluggish. Especially in racing, this effect can cost decisive tenths.
Wet suction is not a sign that the ski has “too little wax”. Often the structure, water drainage or wax tune does not match the moist conditions optimally.
What role does base structure play?
The structure in the ski base helps drain water in a controlled way. In wet snow, the ski needs channels through which excess water can escape sideways or backwards.
If the structure is too fine or clogged with wax residue, water drains less effectively. This increases the risk of wet suction. That is why clean scraping and brushing after waxing are so important.
Fine structure
Useful in cold, dry conditions because less water needs to be drained.
More open structure
Helpful in moist snow because water can be drained more effectively.
What Ski Wax must do against wet suction
In moist conditions, Ski Wax must do more than reduce dry friction. It should support water management, protect the base and prevent water and dirt from sticking too strongly.
This is where the combination of the right Ski Wax, clean Ski Waxing and suitable base structure matters. A poorly scraped ski can be slow despite high-quality wax because excess wax blocks the structure.
Next step: understand wet suction in more detail
Part 2 explains why the thickness of the water film is so decisive and how wet suction affects glide performance in different conditions.
Next article: Wet suction part 2
More topics in the Dominator Academy
Deepen your knowledge of Ski Wax, Ski Waxing and the physics of glide. All articles build on each other and help you develop the optimal waxing strategy for training, recreational skiing and competition.