Stillwater Fly Fishing for Trout
By Alex Clayton · Updated 23 October 2026
Most blank days on a reservoir have little to do with the fly on the end. UK fly-fishing instructors repeat the same advice: find the fish and the depth they are feeding at, and the pattern becomes a detail.
Stillwater fly fishing means fishing for rainbow and brown trout on lakes, reservoirs and lochs with a fly rod. Most of it is done with buzzers (midge pupae), nymphs, lures and traditional wet flies, and every session comes down to three decisions: where, how deep and how fast.
The seven steps below follow the order you work through a day, from licence and permit to adjusting by season. They build on our guide to fly fishing for trout and coarse fish. If you have never cast a fly line, start with fly fishing for beginners and come back once you can.
Step 1: Get Your Licence and Read the Fishery Rules
Ten minutes with the paperwork saves a wasted journey, or a fine. Before you rig a rod, make sure you are legal and know exactly what your ticket allows.
In England and Wales you need a rod licence to fish for trout from age 13, including on private lakes and reservoirs. Licences for 13 to 16 year olds are free, under-13s need none, and you can be fined up to £2,500 if you cannot show one (GOV.UK). A trout and coarse licence costs £7.30 for one day or £36.80 for 12 months (GOV.UK). Prices change each April, so check GOV.UK before you buy, and see our fishing licence guide for the detail.
The licence allows up to two rods for non-migratory trout on stillwaters, but the fishery may set its own limit.
Most enclosed stillwaters have no national close season for rainbow or brown trout (GOV.UK), but every fishery sets its own season (see fishing seasons). Scotland and Northern Ireland have different rules, so check with the fishery and the relevant authority there.
Anglian Water’s two big reservoirs show what a ticket looks like for 2026 (Grafham, Rutland):
| Grafham Water | Rutland Water | |
|---|---|---|
| Trout season | 7 Mar 2026 to 31 Jan 2027 | 14 Mar 2026 to 31 Jan 2027 |
| Method | Fly, bank and boat | Fly only, bank and boat |
| 8 fish + catch and release | £40 | £40 |
| 4 fish + catch and release | £34 | £34 |
| Sporting (release only, barbless) | £28 | £28 |
Check with the fishery before you travel. For Chew Valley and Blagdon, check current dates and prices with Bristol Water Fisheries.
On big water for the first time, a sporting or four-fish ticket keeps the focus on learning rather than filling a bag. In England and Wales a foul-hooked fish must be returned alive. To find waters near you, browse our lakes and stillwaters.
By now you should know your licence, ticket type, bag limit and hook rule.
Step 2: Set Up a Rod and Two or Three Line Densities
Tackle-shop walls are full of fly lines with Di numbers on the box, and buying all of them at once is an expensive way to stay confused. Depth is the biggest decision in stillwater fly fishing, and line density is how you control it.
Start with the rod. Typical starting points from UK retailer guidance:
- Reservoir bank: 9ft 6in to 10ft, #7
- Loch-style boat: 10 to 11ft, #6 or #7
- Small stillwaters: 9ft, #5 or #6
Then the lines:
| Line | Sink rate | Rough working depth | Main use |
|---|---|---|---|
| Floating | None | 0 to 6ft (long leader) | Buzzers, dries, loch-style wets |
| Slow intermediate / Di1 | Slow | 3 to 10ft | Nymphs and lures just below the surface |
| Di3 | 3 in/sec | 8 to 18ft | Washing line, lures, autumn |
| Di5 | 5 in/sec | 15 to 25ft | Deep lures, washing line deep, winter |
These are retailer figures. Real depth depends on how long you count down and how fast you retrieve.
Experienced reservoir anglers often carry four or five lines. An improver can cover most days with three: a floater, an intermediate and a Di3 or Di5. Sinking lines snag weed more easily and feel heavier to cast, so do not buy them before you need them.
Learn the countdown method from day one. After each cast, count the seconds before you start retrieving, and note the count that brings takes. That turns “somewhere deep” into a depth you can repeat.
If you can only afford one spare line, make it an intermediate. It covers the 3 to 10ft band just below a floater’s reach, where a fast-sinking line would pass straight through.
By now you should be able to put a fly at roughly 3ft, 10ft or 20ft on purpose.
Step 3: Find the Fish Using Wind, Temperature and Structure
A big reservoir can look like a featureless sheet of grey water. It isn’t, and reading it is the part of reservoir trout fishing that the fly box cannot fix for you.
Wind first. In early season, trout often gather at the warmer downwind end, where surface water and food are pushed together. A wind in your face makes casting harder, but it is often the productive bank. Look for calm lanes (wind lanes) on the surface too: food collects in them, and fish patrol them.
Temperature second. Cold water slows trout down. In summer, fish may sit deeper in cooler water through the day, then move up at dawn and dusk. With a high sun and a warm surface, start deeper than you would in spring.
Structure third. Look for:
- Drop-offs and shelves where shallow water falls away
- Weed edges
- Submerged stumps and overhanging branches
- Inflows and points
- Dam walls and valve towers on reservoirs
Signs of fish. Rises, birds working one area and other anglers’ bent rods all tell you something. On a new water, check the returns board in the lodge and ask the staff where fish have come from recently. It costs nothing and saves hours of searching.
Best for: downwind banks in spring, shelves and drop-offs in summer. Skip the flat-calm, sheltered bay at midday in summer unless fish are clearly showing there.
By now you should have picked a spot and a likely depth band to start in.
Step 4: Start With Buzzers on a Floating Line
Anglers coming from lure fishing are usually surprised by how slowly a buzzer should move. Near static is often right, and a very slow figure-of-eight is the fastest you need.
A buzzer imitates a midge pupa rising to hatch. Buzzers and other midge stages make up a large part of a stillwater trout’s diet, and Sportfish’s tuition team advises carrying them all year. For buzzer fishing, sizes run from about a 10 in early spring down to a 16. Black, red, olive and orange in sizes 10 to 14 cover most days.
Build A: the static buzzer team
- Use a floating line.
- Tie a leader of 18 to 22ft (a typical retailer figure).
- Fish three buzzers, with droppers at about 6ft and 12ft from the point fly.
- Cast, then let the team settle for about 30 seconds.
- Retrieve with a very slow figure-of-eight, or leave it static.
- Strike at any draw on the line or movement of the fly line tip.
Match tippet strength to the size of fish the water holds and to any rule the fishery sets.
Build B: buzzers under a bung
- Fix a foam indicator on the leader.
- Hang the buzzers below it at the depth you want to fish.
- Cast, let it settle and watch the indicator.
- Strike on any dip or draw.
Some fisheries restrict indicators, so check the rules before you tie one on. For more on indicators and nymph presentation, see nymph fishing. For patterns, see our guide to trout flies.
Takes usually come on the drop or on the slow retrieve. If nothing happens in 30 to 40 minutes, move on to Step 5. Changing buzzer colour every cast rarely fixes a depth problem.
Verdict: on most UK stillwaters, for most of the season, a buzzer team on a floating line is the right way to start the day.
Step 5: Go Deeper With the Washing Line or a Lure
If the trout are at 15ft and your buzzers hang at 6ft all day, you can fish perfectly and never cover a fish. A sinking line takes the fly down to them.
The washing line rig
- Choose an intermediate, Di3 or Di5 line depending on the depth you need (see the table in Step 2).
- Tie a leader of roughly 12ft.
- Put a buoyant fly, such as a Booby or FAB, on the point.
- Fish nymphs or buzzers on two droppers.
- Count down until the team sits about 18in to 3ft off the bottom, or at the depth fish have shown.
- Retrieve with a steady, medium figure-of-eight.
The buoyant point fly holds the leader roughly horizontal, so both droppers fish at the same depth for the whole retrieve. Some fisheries ban or restrict boobies, so check the rules first.
Lures on a sinking line
Lures search water fast. Fish them on an intermediate or Di3 with a quicker or varied retrieve. They come into their own in autumn, when trout feed on fry along the margins, and Sportfish advises carrying fry patterns from mid-September. Use the countdown from Step 2 to find the taking depth, then repeat it cast after cast.
Lures find active fish quickly. On pressured water, where fish have seen plenty of stripped lures, try a slow nymph before you give up on a spot. For patterns, retrieves and colours, see streamer fishing.
Washing line or lure? Choose the washing line when you know roughly where the fish are and they are taking naturals. Choose a lure when you need to find fish, or when they are chasing fry.
By now you should know the taking depth and retrieve. Stick with both until the takes stop.
Step 6: Fish Loch Style From a Drifting Boat
A boat puts you over water no bank angler can reach. Loch style fishing is traditional wet fly fishing from that boat, and the routine is simple enough to learn on your first drift.
The boat drifts broadside down the wind, and the anglers cast downwind ahead of it. It needs a wave, so it suits breezy days, and it is the traditional method on Scottish lochs and Irish loughs.
How to fish a drift
- Use a 10 to 11ft #6 or #7 rod with a floating or intermediate line (Step 2).
- Tie on a team of three wet flies on a shorter leader than you would use for buzzers.
- Make a short cast ahead of the drifting boat.
- Retrieve steadily while lifting the rod high.
- At the end of the retrieve, hold the top dropper so it dibbles in the surface film for a few seconds. Takes often come right then.
- Recast and repeat.
Etiquette and safety. Cast in your own arc so your line never crosses your partner’s. Wear a lifejacket every time, and follow the fishery’s wind and age restrictions for boats.
At Rutland and Grafham in 2026, a day boat costs £32, a half day (before or after 2pm) £25, and a single-manned day boat £20, on top of your permit (Anglian Water Parks). Age and wind restrictions apply, and you cannot mix trout and predator fishing in the same boat. Check with the fishery before you travel.
For wet fly patterns, see trout flies.
If you are new to boats, book a half day with a partner who has fished a drift before. You learn the routine faster, and you share the cost.
By now you should be able to fish a full drift and work the top dropper.
Step 7: Adjust by Time of Day and Season
Changing flies every five minutes is the habit that costs stillwater anglers the most fish. The Essential Fly makes the same point: depth, retrieve and confidence matter more than pattern, so change presentation before changing fly.
When takes stop, work through this order:
- Change depth.
- Change retrieve speed.
- Move to a new spot or drift.
- Only then change fly.
Let the season set your starting method:
| Season | What trout are doing | Starting method |
|---|---|---|
| Spring | Buzzer hatches from late March | Buzzers on a floater |
| Summer | Best at dawn and dusk, deeper through the day | Dries or emergers on calm evenings, deeper nymphs by day |
| Autumn | Feeding on fry in the margins | Lures on an intermediate or Di3 |
| Winter | Slow and deep | Sinking line, slow retrieve |
On a flat, calm summer evening with fish rising, put the sinking lines away and fish a dry fly or emerger to the rises. Winter is not a write-off either: Sportfish notes that a hatch can still happen between about 10am and 2pm, so keep a buzzer team ready.
Look after the fish you release. Wet your hands, keep the fish in the water while you unhook it, and use barbless hooks where the ticket requires them. As Step 1 covers, foul-hooked fish must be returned alive in England and Wales.
Verdict: set your method by the season, then change depth and retrieve before anything else.
Frequently asked questions
Do I need a rod licence to fly fish a stillwater?
Yes, in England and Wales you need a rod licence from age 13, including on private lakes and reservoirs. A trout and coarse licence costs £7.30 for a day or £36.80 for 12 months, and prices change each April, so check GOV.UK. Scotland and Northern Ireland have different rules.
Is there a close season for trout on reservoirs?
Most enclosed stillwaters in England and Wales can be fished for rainbow and brown trout all year under national rules, but each fishery sets its own season. Rutland and Grafham, for example, close on 31 January 2027 for the 2026 season. Check local byelaws and the fishery before you go.
How many rods can I use on a trout stillwater?
A trout and coarse licence allows up to two rods for non-migratory trout on reservoirs, lakes and ponds. Each fishery can set a lower limit, and its ticket rules override the licence, so read them before you set up two rods.
What is the best fly for reservoir trout?
A buzzer in black, red, olive or orange, sizes 10 to 14, is the best starting fly for reservoir trout fishing for most of the season. Depth and retrieve matter more than pattern, though, so fix those first.
Is bank or boat fishing better for beginners?
Bank fishing is better for most beginners: it is cheaper and simpler, and it suits learning to cast, count down and read water. A boat reaches more water and is needed for loch style. At Rutland and Grafham in 2026 a day boat costs £32 on top of the permit, which is worth paying once the basics are in place.