How to Choose a Fly Line for Lake Fishing: Floating, Intermediate or Sinking?
A fly line is one of the most important parts of your entire setup. It directly determines how deep your fly will fish, how well you can control it, and whether you can reach fish that are not feeding on the surface. Many anglers focus mainly on the rod, reel, or the fly itself, but in practice it often turns out that the problem is not the fly at all — it is how and at what depth you are presenting it.
This matters even more in lake fishing and stillwater fly fishing. On lakes, success is often decided not only by the fly you choose, but also by whether you fish it on the surface, just under it, or deeper near the bottom. If you have the wrong line, you can have the right spot, the right timing, and the right fly — and still miss the depth zone where the fish are actually feeding.
In this article, we’ll break down the key differences between floating, intermediate, sink tip and full sinking fly lines, explain what each type really means, and show you how to choose the right fly line for stillwater and lake fishing.
Recommended Fly Lines for Getting Started
If you’re looking for a practical starting point, this is a very solid trio that helps you understand the real difference between a floating, intermediate and sinking line in actual stillwater use.
Floating line
A.Jensen VECTOR Floating – floating fly line
A floating fly line designed for long casts when fishing lakes and coastal waters. A great choice for anglers who want easier casting, better control of the setup, and reliable fly presentation high in the water column.
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Full Intermediate
A.Jensen VECTOR Full Intermediate – fly line
A full intermediate fly line that sinks slowly and evenly along its entire length, including the running line. An excellent choice for lakes, streamer fishing, and clear water when you want to fish just under the surface without disturbing it too much.
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Sinking line
Greys Platinum X T5 Sink – fast sinking fly line
A fast sinking fly line rated at S5 (5 ips / approx. 12.7 cm/s), built for fishing deeper layers of water. A strong option for streamer fishing, long casts from shore or boat, and situations where you need to get your fly quickly down to active fish.
View productImportant: With fly lines, you can’t determine the ideal model based on the AFTMA number alone. In practice, the right choice also depends on the specific rod, the fishing technique, and the type of water you fish.
If you’re not sure what to choose, feel free to call us. We would much rather recommend a line that will actually work well on your rod than one that is only “correct on paper”.
How Fly Lines Behave in the Water
The first thing to understand is that different fly lines behave differently in the water. Some stay on the surface, some sit just below it, and others get down deeper. This difference is absolutely key when choosing the right line for lake fishing and stillwater fly fishing.
Floating
A floating line stays on the surface. It is ideal for surface fishing, dry flies, delicate presentations, or situations where fish are showing on the surface.
Hover / Intermediate
An intermediate or hover line moves just below the surface. This is a very important zone, because on lakes a lot of active fish often cruise right there. It’s an excellent choice when you don’t want to stay fully on top, but you also don’t need to get deep yet.
Sinking
A sinking line gets down lower. It is used when fish are feeding deeper, in colder water, in windy conditions, in greater depth, or when fishing streamers and heavier flies in the lower layers.
WF, DT or Shooting Head? The Basic Types of Fly Lines
Besides how a line behaves in the water, it’s also useful to understand the basic fly line types based on profile and intended use. Not every fly line is built the same, and the taper profile can significantly affect casting performance and the overall feel of your setup.
WF – Weight Forward
The most common and most versatile option. Most of the weight is concentrated in the front section of the head, which helps with casting and improves energy transfer. For most anglers, this is the most logical place to start and the most practical all-round choice.
DT – Double Taper
A symmetrical line with tapering on both ends. It still has its place, especially for delicate presentation and a more traditional style of fly fishing. It’s not as universally practical as WF today, but it still has value in the right situations.
Shooting Head
A more specialised option designed for longer casts or specific fishing styles. Better suited to more experienced anglers or situations where you want a more heavily loaded head and maximum casting distance.
Some specialised lines are built for very specific techniques, but for general lake fishing and stillwater fly fishing, the most important profiles are still WF, DT and shooting head. If you want to compare them in a real-world product range, take a look at our fly line selection.
Floating vs Intermediate vs Sink Tip vs Full Sinking: What Do They Actually Mean?
With fly lines, it’s not just about whether they float or sink. What really matters is how the line is built and which part of it goes deeper. This is exactly where the difference lies between basic understanding and making a genuinely good line choice.
Floating line
A floating line is excellent for surface fishing, dry flies, buzzers, delicate presentations, or washing line setups. It is also a very good starting point because it is the easiest type to control.
Intermediate line
An intermediate line fishes just under the surface. This layer is often extremely important on lakes. If fish are not taking right on top but are still moving in the upper part of the water column, an intermediate line can easily be the best line of the day.
Sink Tip line
A sink tip is not a fully sinking line. It is a line where the main body floats or stays higher, while the front section — the tip — sinks deeper. It is very useful when you want to get the fly down a bit, but you don’t want the whole setup to sink too deep.
Full Sinking line
The entire line sinks. This is the choice when you need to get deeper and keep your flies lower throughout the retrieve. On lakes, it can be especially effective in colder water, in greater depth, or when fish are holding close to the bottom.
When Should You Choose a Floating, Intermediate or Sinking Fly Line?
The simplest rule is this: you don’t choose a fly line by its name alone — you choose it based on the depth where you want to fish your fly. In practice, that matters much more than the marketing description on the box.
When fish are feeding on the surface
Reach for a floating line. This is the classic choice for dry flies, delicate presentations, or very shallow retrieves.
When fish are feeding just under the surface
This is where an intermediate line shines. On many lakes, it is one of the most practical and versatile fly lines you can own. If you fish lakes or stillwaters regularly, it is extremely useful to have a quality intermediate fly line alongside a floating line, because the upper to mid-water zone is often the most productive.
When you need to get the fly deeper, but not all the way down
This is where a sink tip often makes perfect sense. It helps get the front part of the setup lower without dragging the entire line deep.
When fish are deep or you need to sink quickly
This is when a full sinking line comes into play. It’s the right choice for deeper water, colder conditions, or when you need to get your flies down and keep them there.
Retrieve Speed Also Changes Fly Depth
It’s important to understand that final fishing depth is not determined by line type alone. Retrieve speed, pause length, retrieve angle, and the resistance of the fly in the water all have a major effect as well.
Even with the same line, you can fish your flies differently:
- slow retrieves often keep the fly higher and more natural,
- medium retrieves are the most versatile,
- fast retrieves change line tension, retrieve angle, and the character of the fly’s movement.
In practice, it’s not only about which line you buy, but also how you use it.
Most Common Mistakes When Choosing a Fly Line
- choosing only by name without understanding the water layer,
- ignoring where the fish are actually moving,
- buying a full sinking line without a real reason,
- underestimating how useful intermediate lines can be,
- focusing only on sink rate and forgetting about retrieve speed,
- expecting one single line to solve everything.
What Fly Line Should You Choose First for Stillwater?
If you’re just getting started with fly line selection and don’t want to buy multiple lines right away, the safest first choice is usually:
- floating line – if you want the most versatile foundation and more options near the surface,
- intermediate line – if you want to target fish below the surface and have better control in the upper part of the water column.
If you fish lakes or stillwaters more often, a very strong two-line combo is usually:
- 1× floating
- 1× intermediate
Later, you can add a sink tip or full sinking line depending on the conditions you fish most often.
If you want to choose your first line without unnecessary guesswork, browse our fly line selection or give us a call — we’ll be happy to recommend the right line based on your rod, fishing style, and the type of water you fish.
Conclusion: The Right Fly Line Means the Right Depth and Better Control
Choosing the right fly line for lake fishing is not about what sounds more technical or more expensive. It’s about the depth where you want to present your flies and how precisely you want to reach the fish.
Floating stays on the surface.
Intermediate keeps your fly just under the surface.
Sink Tip gets the front part of the setup deeper.
Full Sinking helps you reach deeper water near the bottom.
Once you understand that, choosing a fly line stops feeling chaotic and starts making sense. And that’s the point where a fly line stops being just another piece of tackle and becomes a real tool that helps you fish more effectively in stillwater fly fishing.
Video from the Water: Stillwater Fly Fishing in Real Tempo
Theory matters, but with fly lines, the real difference often becomes clear only when you see it happening on the water. In this lake fishing video, you can clearly see the casting style, line control, and retrieve tempo used in stillwater fly fishing. These are exactly the small details that often decide what depth your fly fishes at — and whether you actually reach active fish.
Beyond the fishing itself, the video also captures exactly the kind of atmosphere every stillwater angler knows: standing next to someone who just seems to do everything right. Simply put — one of those classic “cast, fish” situations. 😄
If you want to make fly line choice easier, take a look at our fly line selection or give us a call — we’ll be happy to recommend the right option based on your rod, fishing style, and the type of water you fish.
