Spate · Granite · Devon, GB-ENG

River Tavy

Photo of River Tavy

A western Dartmoor spate river running fast over granite into the Tamar.

Fair · Sea Trout
Black & Silver Tube · 1-2 inch
Fairlive now
Decent — worth a look
River lifting fast on the rain. Wait for the rise to peak before settling on a beat.
65% confidence
What moved it
  • Level0.53 mLifting fast
  • Water temp15.7°C
  • ClarityVery colouredColouring up
Today's fly
BS
Black & Silver Tube1-2 inch
In deep pools and dark water, silhouette and contrast do the work colour cannot. A fly that reads as black against depth is enough. Fish it broadside, hold the swing, let it hang at the dangle — that is when the best fish take.
Conditions on the water
Live gauge
Level
Rising
0.53 m
Lifting fast
Water temp15.7°C
ClarityVery coloured
Weather17°C
WindS 32 km/h
Pressure1010 hPa
Rain · recent17.1 mm
Rain · ahead2.6 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Sea Trout
Warm — slow
16°C est.ideal 8–15°C
0°14°28°
How to fish it · for Sea Trout
When
From dusk into the first half of the night.
Where
Deeper pools and slower glides · hold water and current seams.
Method
Fish dark patterns on a sink-tip or lightly sunk line, especially near structure.
Kit
10 ft #6/7 rod, floating line with a sink-tip option, 8–10 lb fluoro tippet for the swing.
Why this works
Fair — barometric pressure is working for you, but time of day is the limiting factor today.
Likely species
Hatch timeline · todayPeak at 2pm

Hatch predictions

Today's headline hatch shown — see all 12 active hatches hour by hour as a supporter.

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Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 3 as a supporter.

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Evidence
Survey-backed · regionalHigh confidence

Backed by regional invertebrate surveys; no sampling on this exact reach yet.

Through the year
0–3 scale · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Salmon runRun
1
2
2
2
2
2
1
Trout seasonSeason
1
2
2
2
2
2
1
March BrownHatch
2
3
2
CapererHatch
2
3
3
2
Heather FlyHatch
2
2
Autumn DunHatch
2
3
2

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Sea Trout fly box

Fast, moody Dartmoor water that turns over in hours, not days — you get a narrow window on the falling spate, so be ready. Small flies and spiders, fished short into the pocket water.

Local classics: Half Stone·Blue Upright
BS
Black & Silver TubeTop
1-2 inch · Tube
In deep pools and dark water, silhouette and contrast do the work colour cannot. A fly that reads as black against depth is enough. Fish it broadside, hold the swing, let it hang at the dangle — that is when the best fish take.
Medicine Fly
Medicine Fly
8-12 · Streamer
Slim and mobile — fished sunk through the pool when surface work is not producing. Consistently takes fish that will not come to the surface.
SF
Snake Fly (Black)
2-4 inch · Streamer
A mobile eel-like profile that undulates through deep pools — effective when sea trout are lying deep and not responding to conventional wets.
What's coming
Plan ahead
5-day outlook
Fishing better nearby · 5
Gallery · 2
  1. Photo of River Tavy
    River Tavy — image via Wikipedia (River Tavy)
  2. Terrain map of the venue
    Terrain map
About this water

A western Dartmoor spate river running fast over granite into the Tamar. Salmon and sea trout with wild brown trout in the moorland sections. Short, steep and responsive to rain — classic Devon spate water. Atlantic salmon are assessed by the Environment Agency against each river's Conservation Limit — many principal rivers are classed 'at risk' with mandatory catch-and-release byelaws; check current rules before fishing.

Under the surface

The Tavy rises in the high blanket bog of northern Dartmoor, at Tavy Head just south of Fur Tor and Cut Hill, within half a mile of the sources of the Taw and the Okement. From there it cuts a rough, steep-sided valley south-west, squeezing through the boulder chaos of Tavy Cleave before it emerges among the farmland and runs down past Tavistock to join the Tamar near the tide. It is no gentle lowland river: swift and clean, it crashes over and around a granite bed, rising and falling hard with the moorland weather. The water is acidic and quick-clearing off the granite, peat-stained in spate. The Tavy carries a good run of salmon and the sea trout — peal — for which the Devon rivers are known. Wading is serious granite-boulder work, slick and uneven, and the Cleave in particular is no place to be caught by a rising river.

Wading: Slick granite boulders, fast to rise in Tavy Cleave

Sea trout here

Summer-autumn runs (June–September), nocturnal peak season pattern

  • Granite
  • Partly confined
  • Step pool
  • Pool riffle
Water quality (WFD)
  • Ecology: Moderate
Water quality details
  • Dissolved oxygen: High
  • Ammonia (Phys-Chem): High
  • pH: High
  • Phosphate: Moderate
  • Temperature: High

EA (England) · GB108047007840

Why this score · for Sea Trout
  • Temperature6428% weight
  • Flow3022% weight
  • Clarity4518% weight
  • Feeding Time2513% weight
  • Pressure857% weight
  • Insect activity5912% weight
Directions
Seasons & zones
  • Salmon 1 March → 30 September
  • Trout 15 March → 30 September

Sea trout: Variable seasonal (2026)

Salmon: Negligible (2026) — EA 2024 Salmon Stocks Assessment classifies this river 'at risk' — egg deposition below Conservation Limit. Conservation priority; not a salmon fishing destination. The Tavy is one of several West Country rivers in steep decline.

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