Which fly fishing knots do I actually need to know?

Which knots does a fly fishing outfit actually need?

A rigged fly rod has exactly four connections, working outward from the reel. Each one has a standard answer, and the whole list fits on a card.

The bottom two rows are the ones that matter. You will tie them wet-handed, in wind, with cold fingers, while a fish rises upstream. The top two you tie once, at a table, and forget.

How do I tie an improved clinch knot?

The default tippet-to-fly knot, and the one most anglers learn first. It works on everything from 7X to 0X and on hook eyes of any size.

1. Thread the eye

   Pass 6 to 8 inches of tippet through the hook eye.

2. Wrap the standing line

   Twist the tag end around the standing line five times. Use four turns on heavy tippet (3X and above), six on very fine tippet.

3. Back through the first loop

   Pass the tag end back through the small loop formed just above the hook eye.

4. Then through the big loop

   Pass the tag end through the large loop you have just created. This second pass is the "improved" part and is what stops the knot slipping.

5. Wet and seat

   Wet the knot, then pull the standing line steadily — not in a jerk — while holding the fly. The coils should draw down into a neat barrel against the eye.

6. Trim

   Cut the tag about a sixteenth of an inch from the knot. Check that the coils are even and not crossed over each other; a crossed coil is a knot that will fail.

What is the double davy knot, and is it better?

The davy knot is a very small, very fast tippet-to-fly knot popularised in fly fishing by Davy Wotton. The double davy adds one extra pass and is the version most anglers who use it actually fish. Its advantages are real and specific: it uses less tippet per tie, it seats into a tiny profile that does not crowd a small hook eye, and it can be tied in a few seconds.

1. Thread and cross

   Pass the tag through the hook eye and lay it back across the standing line to make a simple overhand loop, with the fly hanging inside it.

2. Bring the tag through the loop

   Pass the tag end through that loop once — this is a single davy.

3. Add the second pass

   Pass it through the same loop a second time. That is the double davy.

4. Wet and pull

   Wet it, then pull the standing line and the fly apart in one smooth motion so the knot rolls down and locks against the eye. Pulling the tag rather than the standing line is the usual mistake.

5. Trim close

   The finished knot is compact enough that a long tag looks obvious. Trim it tight.

Which to use? The clinch is more widely known and more forgiving of sloppy seating. The double davy is faster and smaller, which matters when you are changing a size 20 Copper John every ten minutes in a hatch. Both are strong enough to fish confidently.

How do I tie a double surgeon’s knot for tippet?

The workhorse for joining two lines of similar diameter — leader to tippet, or tippet to tippet when you build a two-fly rig.

1. Overlap the two lines

   Lay the leader end and the tippet alongside each other, pointing in opposite directions, overlapping by 5 or 6 inches.

2. Form one loop from both

   Treating the doubled section as a single strand, tie a loose overhand knot — a simple loop with both strands passing through.

3. Pass through twice

   Pass the same doubled section through the loop a second time. Two passes is a double surgeon’s; three is a triple, which is marginally stronger and bulkier.

4. Wet, then pull all four ends

   This is the part people skip. Pull all four strands — both standing lines and both tags — evenly at the same time. Pulling only two seats the knot crooked.

5. Trim both tags

   Cut both tags close. A tag left long on this knot will foul your leader on every other cast.

How do I connect fly line to leader?

Almost every modern fly line ships with a welded loop at the front end, and almost every tapered leader ships with a loop at the butt. That makes the connection a loop-to-loop, which takes four seconds and needs no knot at all.

1. Pass loop through loop

   Push the leader’s loop through the fly line’s loop.

2. Pass the whole leader through its own loop

   Feed the far end of the leader — all nine feet of it — through its own loop, then draw it tight.

3. Check the shape

   Correct is a square interlock, like two links of a chain. Wrong is a girth hitch, where one loop cinches around the other. A girth hitch cuts into the line and hangs up in the tip guide.

If your line has no welded loop, the traditional answer is a nail knot — leader butt whipped onto the fly line over a tube or a nail. It is a neat, low-profile connection that passes through guides smoothly, and it is genuinely fiddly to tie by hand. A nail knot tool makes it a thirty-second job. Alternatively, tie a nail knot once with a short butt stub, put a perfection loop in the stub, and go back to loop-to-loop for every leader change afterward.

What is an arbor knot, and when do I use it?

The knot that ties backing to the bare spool of a reel. You will tie it once per reel and probably never think about it again, but a slipping arbor knot spins the whole spool of line uselessly, so it is worth doing properly.

1. Pass the backing around the arbor

   Take the backing around the reel’s center spindle and bring the tag end back out.

2. Overhand around the standing line

   Tie a simple overhand knot with the tag end around the standing line.

3. Overhand in the tag itself

   Tie a second overhand knot in the tag end alone, an inch or so beyond the first. This acts as a stopper.

4. Pull tight

   Pull the standing line so the first knot slides down and jams against the stopper, cinching the whole thing onto the arbor.

Which knot should I learn first?

The tippet-to-fly knot, tied until you can do it without looking. Everything else can be done at home in good light with a video open. This one gets tied on the bank, in wind, when a hatch has started and the fish are eating a Elk Hair Caddis you have not managed to attach yet.

Practice with heavy line, not tippet. A length of 20lb monofilament and a big hook makes the mechanics obvious in a way that 6X does not, and the muscle memory transfers straight down to the fine stuff. Ten minutes an evening for a week is genuinely enough.

And check your knots by pulling them. Every one, before it goes in the water. A knot that fails in your hands costs you thirty seconds. The same knot failing on a fish costs you the fish, your fly, and often the fish's welfare too — a trout swimming off with a Woolly Bugger in its jaw is the outcome nobody wants.