What Fly Rod Weight Should I Use?

Be sure to read this article on fly rod weight before you make your rod purchase. You'll gain a better understanding of what you need.

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When anglers are looking to make the proper choice for a fly rod, rod weight is one of the most important factors to consider. Action and length matter, but the improper weight of a rod can negatively impact your time on the water.

Using something too heavy or too light leads to uncomfortable and challenging days on the water. With the massive amount of information available to anglers in terms of selecting the proper rod, it can be overwhelming to know what the best option is.

It’s important to have a full understanding of the type of fishing you’re doing. Without this understanding, you’ll have the possibility of choosing the wrong rod and wasting quite a bit of money.

When I first began fly fishing, I chose a rod that wasn’t the right weight. I was given wrong advice and ended up unnecessarily spending a few hundred dollars on something I wouldn’t use for years to come.

I know what it’s like to make mistakes and not fully understand what rod is needed. With my years of fly fishing experience, I now know what’s right and what doesn’t work for anglers.

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Understanding Fly Rod Weights

Fly fishing companies produce rods ranging from 1-weight to 11 or 12-weight rods. Each has their own specific purpose and will help you perform well in certain scenarios.

What Fly Rod Weight Should I Use

1 and 2-Weight Rods

1 and 2-weight rods are for anglers fishing small streams who need to finesse their way around the water. These rods often come in 6 to 8 feet. Since many small streams have quite a bit of cover, the shorter the length, the less you have to worry about getting your line stuck. Also, you’ll have more power to fight the fish in the tighter space.

If you spend the majority of your time on small streams and in tight conditions, a 1 or 2-weight is a great option for you. You’ll be able to land 10-12 inch fish with this rod, but be sure you’re not testing the power too much.

You can easily present dry flies and nymphs with these weights of rods, but don’t attempt to throw size 2-8 streamers. The casting rhythm will feel wrong and you won’t be able to make mends as smooth as normal.

The 1 and 2-weight rods are a blast to fish as long as they’re within their limits. It’s a true fight no matter the size of the fish you hook into. Snowbee, Redington and Temple Fork Outfitters all make great 1 or 2-weight options. These rods work for small trout and panfish.

3 and 4-Weight Rods

3 and 4-weight rods are great options for streams and small to medium size rivers. These rods have a bit more backbone and can be found anywhere from 7 to 9 feet. The longer length allows you to stretch out your casts and have a farther reach over the water.

4-weight fly rods

If you’re looking to throw a variety of flies, a 3 or 4-weight will work just fine. You can use up to 5-weight line when using a 4-weight rod. If you’re throwing a 3-weight, don’t use more than a 4-weight line. When it comes to flies, your 4-weight should be able to handle just about anything you need to throw.

Depending on your ability and the action of your rod, you might have to stay away from size 0-4 streamers. You don’t want to feel as if you’re out of control when making your casts.

Your 3-weight can easily throw dry flies, nymphs and a few streamers. Again, it’s mainly up to your comfort level. If you’re throwing large streamers in search of trophy fish, the 3-weight shouldn’t be what you’re using. A 3-weight can handle up to 16 or 17 inch fish, but not much more than that.

You need the power to fight the fish and net them before they completely exhaust themselves. Take fish health into consideration when choosing the size of rod.

3 and 4-weight rods are a great versatile rod that can perform in a variety of smaller water situations. They’re great for smaller trout and panfish.

5 and 6-Weight Rods

As far as all-purpose rods are concerned, 5 and 6-weight rods are the ideal weight. These rods are capable of throwing all different types of flies and performing well in a variety of water. You can use your 5 and 6-weight in medium to large rivers as well as lakes.

Man Holding The Best 6 Weight Fly Rods on a river

Depending on the type of rod you purchase, your 5 and 6-weight rod can delicately present dry flies and also has the power to throw any size of streamer. You can also get a bit more versatile with the lines you choose.

Use sinking, floating, sink tip and everything in between on a 5 to 6-weight rod. What you’ll gain in power, you may lose out on in versatility with this size of rod, but that doesn’t have to be the case. The more comfortable you get with your rod, the better you can use it.

These rods can be found from 8′ 6″ to 10′, depending on your needs and style of fishing.

You can target smaller bass, large trout and a variety of other freshwater species with a 5 or 6-weight rod. Fish these rods hard and target fish with whatever method you deem necessary. They’ll be able to handle it.

7 and 8-Weight Rods

7 and 8-weight rods should be used when you’re going after larger fish. If you’re in search of bass, pike, steelhead and salmon, then make sure you’re using at least a 7-weight rod. They have a solid backbone and can make long casts and fight the majority of larger fish you want to land.

7 weight fly rod good for fly fishing trout

If you know you’re going to tie into some double digit salmon, it may not be a bad idea to up your weight to a 9 or 10-weight, but the 8-weight could handle them. You can fish these rods in lakes, rivers and certain saltwater situations.

Large saltwater fish will easily snap one of these rods, so be sure to be careful if you take it to the ocean. Dry flies will be tougher to present with a 7 or 8-weight rod, but if necessary, you can do it. Any size streamer will be easy to cast with this heavy rod.

Also, you can specialize in the type of line you need to use. Snowbee and Moonshine Rod Co. make great options for your heavier fly rods.

9 and 10-Weight Rods

9 and 10-weight rods are what you’re going to use when you hit the saltwater flats or pursue king salmon in Alaska or Canada. These rods are extremely strong and built for power. They can throw almost any size streamer or large dry fly in pursuit of those predator fish.

10-Weight Rods

These rods can be found in single hand, switch and spey. Depending on the length of casts you need to make, you can choose what type of rod best suits you. If you’re purchasing a 9 or 10-weight rod, find one with a lifetime warranty.

You’re going to get into fish that are more than capable of snapping this rod, and you must be able to fish this rod aggressively. A lifetime warranty will give you peace of mind that you can fish it in any style.

10+ Weight Rods

Rods over 10-weight are mainly meant for saltwater. If you’re targeting tarpon or anything similar in size, you’ll need a rod that’s over a 10-weight. These take some time to understand how to cast, but a high quality 10 or 11-weight feels as smooth as a nice 5-weight. Similar to the 9 or 10-weight rod rod, purchase one with a lifetime warranty. You’ll need it.

Consult local fly shops about which size rod you’ll need if you’re fishing saltwater. The anglers in the area will have a great understanding of what size rod will work best.

Best Rod Weights for Streams

If you’re fishing streams, a 3-weight rod is really the ideal option. You can find it in a variety of lengths that have enough power to fight those larger fish you tie into but still possess enough finesse for whatever situation you encounter.

A vintage bamboo fly rod on a streamside

You can be a bit more selective with your length as well. Rods from 7′ up to 11′ are available in 3-weights. Throw nymphs, dries and some small streamers through that moving water, and you’ll find the 3-weight is an ideal option.

Best Rod Weights for Rivers

If you’re fishing medium to large rivers, a 6-weight rod is what you’ll need. Since large rivers have the possibility of holding 25+ inch fish, you need one with a bit more power to fight them. Also, a quality 6-weight can present dry flies up along the banks just fine.

An angler fly fishing on a river using a moonshine epiphany fly rod

You can get away with a 5-weight, but be sure to understand the size of fish you might find. A fast action 5-weight could work! However, if you’re after steelhead or salmon, a 7 or 8-weight is what you’ll need.

Best Rod Weights for Lakes

If you’re fishing a lake, a 6 to 8-weight rod is what you’ll need. When targeting pike or musky, the heavier, the better. If you’re after bass or trout, then the 6-weight is just fine.

Fly Fishing on a Lake
Make sure you’re aware of what size and type of line you’re using.

Most Versatile Rod Weights

For versatility, purchase a 5 or 6-weight. They can work in streams, rivers and lakes. They’ll throw streamers and dry flies just fine! If you’re looking to purchase your first fly rod, then the 5 or 6-weight is ideal.

Fly Rod Reviews


Understanding fly rod weights is vital for success. You’ll find that the more narrow you can make your focus, the more success you’ll have. Do your research and gain a full understanding of the type of fish you’re targeting and size of water you’re fishing.

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My name is Danny Mooers and I’ve been fly fishing for five years. As soon as I went to college, I dove headfirst into my obsession for fly angling. Every spare weekend or long break was dedicated to finding fish. I’ve fished all over North America in search of trout, salmon, steelhead and everything in between. I currently write articles for Guide Recommended and Reel Adventure Fishing. Fly angling is one of the most challenging yet rewarding hobbies any person can have. Don’t be afraid to give it a try.  It’s an addicting activity that tests everything from your fine motor skills to your patience, but it’s well worth your time.

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