Spate · Granite · Brittany / Côtes-d'Armor (Trégor), FR

Léguer

A frost-covered bend of the Léguer river at dawn, with a stone house among bare trees on the bank.

Brittany river on granitic bedrock.

Poor · Brown Trout
Pheasant Tail Nymph · 14–18
Closed season
Out of season. Try elsewhere.
Closed — confidence not applicable today.
What moved it
  • Level0.36 mLast reading 6h ago
  • Water temp8.4°C
  • ClarityClear
Today's fly
Pheasant Tail Nymph
Pheasant Tail Nymph14–18
Upstream
Conditions on the water
Live gauge
Level
Steady
0.36 m
Last reading 6h ago
Water temp8.4°C
ClarityClear
Weather4°C
WindSE 14 km/h
Pressure1016 hPa
Rain · recent0.4 mm
Rain · ahead11.5 mm

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

Water temperature for Brown Trout
Cool — slow
8°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Through the open trout season. Spring olives and sedges through May; summer evenings; small dark flies into autumn close.
Where
Pool tails and pocket water through the Côtes-d'Armor valley. Once one of Brittany's premier sea-trout rivers; the sea-trout fishery is now closed under the 2026 Brittany order, but brown-trout fishing remains.
Method
Upstream dry to risers; dry-dropper through the riffles. Breton spate freestone — fish 12 to 24 hours after rain on the drop. Long leader, fine tippet.
Kit
9 ft #4 — Breton spate freestone. Floating line, 12 ft leader to 4 lb fluoro. Studded boots.
Likely species
Stoneflies
Gammarids
Hatch timeline · todayPeak at 11am

Hatch predictions

Today's headline hatch shown — see all 6 active hatches hour by hour as a supporter.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Supporters see what else is on the menu.

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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 · November highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
March BrownHatch
2
3
2
Late March BrownHatch
2
3
2
Large Brook DunHatch
2
3
2
Large StoneflyHatch
2
3
2

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

Ranked for today
Brown Trout fly box

More balanced than the mountain-river pack. French nymphing still matters, but there is more room for dries, spiders and general searching flies.

Permits & access
Permit required — see local rules.
  • AAPPMA permits.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Trieux
25 km
0
Brown trout · Salmon · Sea trout
Aulne
43 km
0
Brown trout · Salmon · Sea trout
Étang Neuf (Saint-Connan)
25 km
Rainbow trout · Brown trout
Lac Saint-Michel (Brennilis)
42 km
Rainbow trout · Pike
Lac du Drennec
47 km
Brown trout · Rainbow trout · Pike
Gallery · 2
  1. A frost-covered bend of the Léguer river at dawn, with a stone house among bare trees on the bank.
    Le Leguer par -4°C
  2. Terrain map of the venue
    Terrain map
About this water

Wild brown trout water with fly-fishing opportunity. Spring through early summer offers best dry-fly potential when seasonal hatches activate. Responsive to Atlantic rainfall for water volume. Check local AAPPMA for public access details and any regulations or catch-and-release requirements.

Hatches & food

On Atlantic trout rivers in Normandy and Brittany, regional studies and on-the-bank experience point to spring mayflies as the main early driver, a strong band of spring and early-summer caddis as channels warm and open, background buzzer life ticking away right through the year, and terrestrials from wooded banks adding important surface food in summer and early autumn, with autumn olives extending sport wherever trout-season rules allow.

  • Granite
Water quality (WFD)
  • Ecology: Good
  • Chemical: Unknown

WFD classification · FRGR0047

The full read · show the working · for Brown Trout · confidence 90%
How the 0 is built — score × weight = contribution
Temperature72 × 28%20.2
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time65 × 13%8.5
Pressure80 × 7%5.6
Insect activity56 × 12%6.7
Conditions total= 76
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 2nd Saturday of March → 3rd Sunday of September

Salmon: Banned (2026) — Brittany 2026 order bans Atlantic salmon and sea trout on all Breton rivers.

Sea trout: Banned (2026) — Brittany 2026 order bans Atlantic salmon and sea trout on all Breton rivers.

Related guides
Pyrenees PlaybookFrench riversEuro Nymphingsubsurface methods
Booking & contacts
At a glance

Léguer is a spate river in Brittany / Côtes-d'Armor (Trégor), France. Its recorded elevation is about 98 m above sea level and the catchment geology is granite. The river is described as roughly 58 km long. Our data lists brown trout, salmon and sea trout here. The salmon season is recorded as running from CLOSED to CLOSED. The trout season is recorded as running from 2nd Saturday of March to 3rd Sunday of September. Best window recorded for anglers: March–September (trout). Core methods listed: Spey casting; nymphing. Level and flow data for this water is linked from 1 gauge. Its Water Framework Directive ecological status is recorded as good. Access is recorded as day tickets through the local AAPPMA (angling association). Nearby waters in our listings include Trieux at 25 km, Étang Neuf (Saint-Connan) at 25 km and Lac Saint-Michel (Brennilis) at 42 km.