Best Sinking Fly Lines: Getting Flies Down Where Fish Hold
Updated How we research
Most of the water column is invisible to a floating line. When fish hold deep in lakes, heavy runs, or cold water, a sinking line puts the fly in front of them and keeps it there through the retrieve. The choices are sink-tip lines, which keep a floating running line for easier mending and pickup, and full sinking lines, which fish deeper and straighter. Sink rates, measured in inches per second, determine how deep and how fast. We weighed casting manners with heavy flies, how straight each line tracks to the fly for strike detection, density options, and durability. Sink tips suit river streamer anglers who change water frequently. Full sinkers earn their place in stillwaters and deep, steady flows. If you are new to the category, one moderate sink tip covers more situations than a drawer of specialty densities.
The short version
We compared 7 picks. Our scores range from 8.0 to 8.4 out of 10.
- Best overall:Cortland Full Sinking Type 6 Fly Line - Black 90ft WF7S. Highest overall score in this guide at 8.4/10.
- Also great value:Scientific Anglers Frequency Full Sinking Type VI Fly Line. Value score of 9/10, overall 8.3/10.
- Solid build:Cortland Full Sinking Type 6 Fly Line - Black 90ft WF8S. Build and materials score of 8/10, overall 8.4/10.
- Feature-rich:Cortland Streamer Sink Tip 10 Fly Line - Black/Olive 100ft WF5S/F. Features score of 8/10, overall 8.4/10.
Scores are our editorial assessment, not customer ratings. How we score
Cortland Full Sinking Type 6 Fly Line - Black 90ft WF7S
Cortland full sinking Type 6 black 90ft WF7S line, a fast-sinking line for deep lakes and streamers on 7 weight rods.
Our score8.4/10Budget
Cortland Full Sinking Type 6 Fly Line - Black 90ft WF8S
Cortland full sinking Type 6 black 90ft WF8S line, the heavier 8 weight version for deep streamer fishing and salt.
Our score8.4/10Budget
#1Cortland full sinking Type 6 black 90ft WF7S line, a fast-sinking line for deep lakes and streamers on 7 weight rods.
Fit for the job 9/10 · Features and specs 8/10 · Build and materials 8/10 · Value 8/10
- + Type 6 sink rate gets flies down quickly to deep holding fish
- + Black color stays low-visibility to wary fish
- + WF7S spec pairs with 7 weight rods for bass, pike and trout lakes
- - Fast sink rate snags easily in shallow or weedy water
- - 90ft length needs more backing than a longer floating line
#2Cortland full sinking Type 6 black 90ft WF8S line, the heavier 8 weight version for deep streamer fishing and salt.
Fit for the job 9/10 · Features and specs 8/10 · Build and materials 8/10 · Value 8/10
- + WF8S sizing matches 8 weight rods for big streamers and strong fish
- + Type 6 sink rate reaches depth quickly in current or deep lakes
- + Black finish keeps the line discreet in clear water
- - Heavy sinking line is tiring to cast repeatedly
- - Specialized deep line is not useful for surface or shallow fishing
#3Cortland Streamer Sink Tip 10 black/olive 100ft WF5S/F line, a sink tip line for streamers on 5 weight rods.
Fit for the job 9/10 · Features and specs 8/10 · Build and materials 8/10 · Value 8/10
- + Sinking tip with floating running line is easier to mend than full sinkers
- + WF5S/F spec lets a trout rod fish streamers below the surface
- + Two-tone black/olive helps separate head and running line visually
- - Short sink tip does not reach the depths of a full sinking line
- - 5 weight size limits it to smaller streamers
#4Scientific Anglers Frequency full sinking Type VI line, a budget-friendly fast sinker from a leading line brand.
Fit for the job 9/10 · Features and specs 7/10 · Build and materials 8/10 · Value 9/10
- + Type VI fast sink rate targets fish holding near the bottom
- + Frequency series gives Scientific Anglers quality at a lower price
- + Full sinking design keeps flies deep through the entire retrieve
- - Check the line weight before choosing the right size carefully
- - Fast sinkers hang up on rocks and weeds in shallower water
#5Cortland 333 full sinking Type 3 fly line, an affordable sinking line for fishing streamers at mid-depth in lakes.
Fit for the job 9/10 · Features and specs 7/10 · Build and materials 7/10 · Value 9/10
- + Type 3 sink rate reaches mid-depth fish in lakes and slower rivers
- + Full sinking design keeps the whole line at a consistent depth
- + Cortland 333 is a long-running value line series
- - Sinking lines are harder to pick up and recast than floaters
- - Check the line weight option before ordering to match your rod
#6Scientific Anglers WetCel full sinking Sink Type IV line, a classic mid-to-deep sinking line for lakes and rivers.
Fit for the job 9/10 · Features and specs 7/10 · Build and materials 8/10 · Value 8/10
- + Type IV sink rate sits between mid-depth and very deep lines
- + WetCel is a long-trusted sinking line name among stillwater anglers
- + Full sinking profile gives a straighter connection to the fly
- - Check the size variant matches your rod before ordering
- - Sinking lines need a different casting approach that takes practice
#7RIO Mainstream Type 6 full sinking WF4S6 black line, a light sinking line for small rods fishing deep water.
Fit for the job 8/10 · Features and specs 8/10 · Build and materials 8/10 · Value 8/10
- + WF4S6 lets a light 4 weight rod fish streamers and wet flies deep
- + Mainstream series offers RIO quality at a value price
- + Black color is stealthy in clear stillwater
- - 4 weight size is too light for heavy streamers or larger rods
- - Fast sink rate is overkill in shallow creeks
Before you buy: trade-offs we flagged
No pick is perfect. These are the main compromises we noted for the top products in this guide, so you can check they will not matter for you.
- Fast sink rate snags easily in shallow or weedy water (Cortland Full Sinking Type 6 Fly Line - Black...)
- Heavy sinking line is tiring to cast repeatedly (Cortland Full Sinking Type 6 Fly Line - Black...)
- Short sink tip does not reach the depths of a full sinking line (Cortland Streamer Sink Tip 10 Fly Line -...)
- Check the line weight before choosing the right size carefully (Scientific Anglers Frequency Full Sinking...)
- Sinking lines are harder to pick up and recast than floaters (Cortland 333 Full Sinking Type 3 Fly Line)
- Check the size variant matches your rod before ordering (Scientific Anglers WetCel Full Sinking Fly...)
Frequently asked questions
›What is the best choice among sinking fly lines: getting flies down where fish hold?
Cortland Full Sinking Type 6 Fly Line - Black 90ft WF7S is our top overall pick. Cortland full sinking Type 6 black 90ft WF7S line, a fast-sinking line for deep lakes and streamers on 7 weight rods. It earns our score of 8.4/10, based on fit for the job, features, build and value.
›What is a good budget option?
Cortland Full Sinking Type 6 Fly Line - Black 90ft WF8S is the strongest low-cost pick in this guide. Cortland full sinking Type 6 black 90ft WF8S line, the heavier 8 weight version for deep streamer fishing and salt.
›How much should I expect to spend?
Picks in this guide span $ price bands (roughly: $ = under $30, $$ = $30 to $100, $$$ = over $100). We never display exact prices because they change constantly, so the buttons above always show Amazon's current price.
›How were these products chosen?
We shortlist products that fit the job this guide solves and compare their published specifications, such as size, capacity, materials and what is included. Each pick gets an editorial score out of 10 for fit, features, build and value, and we write the pros and cons from those details. Our score is not an Amazon customer rating. We earn a commission if you buy through our links, which never affects the ranking.
Fly Fish Nest independently selects every product; we may earn a commission from links above.
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