Freestone · Granite · Brittany / Morbihan-Côtes-d'Armor, FR

Blavet

Photo of Blavet

Brittany river flowing from Plouay toward the Atlantic, historically a salmon water.

Poor · Brown Trout
Pheasant Tail Nymph · 14–18
New ruleReported 19 Aug 2026

Severe drought restrictions (crise) in force

VigiEau lists this venue's surface-water zone (Blavet rive droite, dépt 56) at crise, under an official préfectoral drought arrêté. Fishing is not itself banned by it, but water levels are low — go gently on stressed fish.

Arrêté préfectoral n°37757 ↗

Temporary notices from official orders and recent fishery reports — they clear automatically once out of date. Always confirm locally before travelling.

Closed season
Out of season. Try elsewhere.
Closed — confidence not applicable today.
What moved it
  • Level0.39 mLast reading 2h ago
  • Water temp9.1°C
  • ClarityClear
Today's fly
Pheasant Tail Nymph
Pheasant Tail Nymph14–18
Upstream
Conditions on the water
Live gauge
Level
Steady
0.39 m
Last reading 2h ago
Water temp9.1°C
ClarityClear
Weather5°C
WindE 13 km/h
Pressure1015 hPa
Rain · recent0.0 mm
Rain · ahead8.7 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
9°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 grannom; sedges through summer; small dark flies into autumn close.
Where
Pool tails and the seams behind boulders through the Morbihan-Côtes-d'Armor stretches. The Blavet runs Breton freestone water. The Blavet is a longer Morbihan-Côtes-d'Armor system with broader middle reaches.
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 12pm

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 2 guilds 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 · November highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
Daddy Long LegsHatch
2
3
3
2
Mayfly (Green Drake)Hatch
2
2
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2
Large Dark OliveHatch
1
2
2
1

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
  • Check seasonal arrêté.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Scorff
17 km
0
Brown trout · Salmon · Sea trout
Isole
26 km
0
Brown trout · Salmon · Sea trout
Ellé
29 km
0
Brown trout · Salmon · Sea trout
Aven
41 km
0
Brown trout · Sea trout
Parc Er Bihan (Colpo)
30 km
Rainbow trout
Gallery · 2
  1. Photo of Blavet
    Blavet — image via Wikipedia (Blavet)
  2. Terrain map of the venue
    Terrain map
About this water

Salmon and sea trout fishing are both closed under the 2026 Breton prefectoral order. Granitic geology gives rapid drainage and clear water, and the wild brown trout fishing between spates is honest and worth the walk. Verify Morbihan regulations before fishing.

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 · FRGR1244

The full read · show the working · for Brown Trout · confidence 75%
How the 0 is built — score × weight = contribution
Temperature84 × 28%23.5
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity48 × 12%5.8
Conditions total= 77
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

Blavet is a freestone river in Brittany / Morbihan-Côtes-d'Armor, France. Its recorded elevation is about 21 m above sea level and the catchment geology is granite. The river is described as roughly 149 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; dry fly. 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 Scorff at 17 km, Isole at 26 km and Ellé at 29 km.