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Techniques

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Rivers

River Tweed

Britain's biggest salmon river, and one of the few with a genuine year-round season.

Region
Scottish Borders, Scotland, United Kingdom
Country
United Kingdom
Water type
Large spate river with a mixed salmon, trout and grayling fishery
Species
atlantic salmon, brown, grayling
Length
156 km
Typical flow
1,000–10,000 cfs; the Tweed is a spate river and can rise 2 m overnight
Season
Salmon 1 February to 30 November; trout 15 March to 30 September; grayling over the winter
Best months
Mar · Apr · May · Sep · Oct
Published
2026-10-23

By The Fly Desk

Fly plate: Tweed Fly / Silver Doctor
Plate 1 · dressing
Aquatic insect plate: Large Dark Olive (Baetis rhodani)
Plate 2 · insect

Hatch timeline

  • Mar · 13:00-16:00Large Dark Olive (Baetis rhodani) Dun

    #14 · Mar · Hatch

  • Apr · 12:00-16:00Grannom caddis (Brachycentrus) Adult

    #14 · Apr · Hatch

  • May · 11:00-16:00Mayfly (Ephemera danica) Dun and spinner

    #10-12 · May · Hatch

  • Jun · 20:00-22:30Blue-Winged Olive (Serratella) Dun at dusk

    #16-18 · Jun · Hatch

  • Jul · 21:30-00:30Sedge caddis (various) Adult, night

    #12-16 · Jul · Hatch

  • Sep · 08:00-17:00Salmon fly (attractor) Swung wet fly

    #4-8 · Sep · Hatch

  • Nov · 11:00-15:00Grayling nymphs and olives All stages

    #14-18 · Nov · Hatch

Matched fly box

PatternImitatesSizeTechnique
Tweed Fly / Silver DoctorSalmon attractor#4-8Classic swing on a floating line with a sink tip, step down after every cast.
Junction ShrimpSalmon shrimp#6-10Cold-water fly for February and March fish; fish it slow and deep.
Waterhen BloaOlive nymph#16North-country spider for trout; two on a short line, swung round.
Pink ShrimpGammarus shrimp#14Winter grayling in the deeper pools; fish it on the bottom.

The river

The Tweed rises in the Lowther Hills and runs 156 km to Berwick-upon-Tweed, draining the whole Scottish Borders. It is the most productive salmon river in Britain and the only one where you can fish salmon, brown trout and grayling in the same week without breaking a rule. Its character changes completely with water height: at low summer levels it is a clear, wadeable river; after rain it becomes a brown, powerful spate that should be left alone.

On this river

Fishing the drop

The best day of a Tweed week is usually the first day the water starts to fall and the colour turns from brown to green. Fish the beats near a tributary mouth, because salmon stack below the inflow before they run. Use a larger fly than normal and a sink tip, because the fish are moving rather than holding.

Trout and grayling in the same week

Because the Tweed's trout and grayling seasons overlap only briefly, plan the week around the calendar: trout on the dry in the middle of the day, grayling on the nymph in the afternoon, salmon at dawn and dusk. Booking a beat that has both fast water and a deep pool is worth more than booking a famous name.

Reading a big border river

The Tweed is 60 to 80 metres wide in its middle reaches and most of it is featureless from the bank. The structure is in the bends and in the tributary confluences, and 80 per cent of the fish are in 20 per cent of the water. Ask the beat owner which pools hold fish at the current height rather than assuming a pool is good because it is deep.

Licence and rules

Scotland does not require a rod licence for trout, but salmon fishing requires a permit from the relevant Tweed Commission beat, and every salmon caught must be reported on a catch return — the Tweed is one of the few rivers in the world with a compulsory rod catch return. Almost all Tweed salmon fishing is on private beats sold by the day, week or season; prices vary enormously between beats.
When should I come?

The best months are Mar · Apr · May · Sep · Oct. Salmon 1 February to 30 November; trout 15 March to 30 September; grayling over the winter

What licence do I need?

Scotland does not require a rod licence for trout, but salmon fishing requires a permit from the relevant Tweed Commission beat, and every salmon caught must be reported on a catch return — the Tweed is one of the few rivers in the world with a compulsory rod catch return. Almost all Tweed salmon fishing is on private beats sold by the day, week or season; prices vary enormously between beats.

How does the water behave?

The Tweed is the classic spate river: it can rise two metres overnight after rain in the Borders hills and colour up completely, then drop and clear over three or four days. Salmon run on the rising water and on the first day of the drop, which is why the productive days are the ones immediately after a spate. The gauge at Norham is the one to watch.

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