Freestone · Granite · Normandy / Calvados-Manche

Vire

Vire terrain map
Terrain map

The Vire is the largest of the Calvados-Manche salmon rivers and drains the heart of the Normandy bocage from Saint-Lô to its estuary at Isigny-sur-Mer.

Good · Brown Trout
CDC Emerger · 16-18
Goodlive now
A proper day on the water
Low and clear — careful approach country. Stay small, stay accurate.
75% confidence
What moved it
  • LevelProxyvia Noireau
  • Water temp16.5°C
  • ClarityClear
Today’s fly
CDC Emerger
CDC Emerger16-18
Dead-drift
Conditions on the water
Proxy gauge
Level
Steady
Proxy
via Noireau
Water temp16.5°C
ClarityClear
Weather15°C
WindW 10 km/h
Pressure1024 hPa
Rain · recent0.0 mm
Rain · ahead0.6 mm

No gauge on this water — conditions are inferred from Noireau. The trend transfers, the absolute level does not.

Water temperature for brown trout
Warm — slow
17°C est.ideal 1016°C
0°14°28°
How to fish it · for brown trout
When
Through the open trout season. Olives April through May; sedges through summer evenings; small dark flies into autumn close.
Where
Pool tails, riffle heads, and the seams behind boulders through the Calvados-Manche valley. The Vire runs Normandy spate freestone water.
Method
Upstream dry to risers; dry-dropper through the riffles. The water reads clear — long leader, fine tippet. Move slowly, cast accurately.
Kit
9 ft #4 — French freestone default. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots.
Why this works
Good — water clarity is working for you, but time of day is the limiting factor today.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 8 active hatches hour by hour with Pro.

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Evidence
Survey-backed · regionalModerate confidence

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

Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Salmon runRun
1
2
2
2
1
Sea trout runRun
1
2
2
2
2
2
2
1
Trout seasonSeason
1
2
2
2
2
2
1
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Autumn OliveHatch
1
2
1
GrannomHatch
1
1

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

Ranked for today
Brown Trout fly box
Permits & access
Permit required — see local rules.
  • AAPPMA Vire / Fédération Calvados & Manche
  • TAC quotas apply.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
About this water

The Vire is the largest of the Calvados-Manche salmon rivers and drains the heart of the Normandy bocage from Saint-Lô to its estuary at Isigny-sur-Mer. It holds the same wild Atlantic salmon stock as the Sée and Sélune — unsupported by hatchery work, small in numbers, historically significant. The run has been weak in recent decades but is stabilising, and the river continues to justify its heritage salmon river status. Fish the Vire systematically. The productive beats run through the gorge sections above Saint-Lô where the river cuts into the granite bedrock and concentrates its current into proper pools. Spring salmon lie in the deep tails of these pools from March onwards. Fish a floating line with a long leader when the water is low; switch to intermediate and small tubes when it carries colour after a spate. The sea trout fishing is honest rather than spectacular — summer night fishing with small wets is the productive method. The brown trout populations in the upper reaches and tributaries are strong: wild fish in granite pocket water, Baetis and stonefly hatches through spring and summer, good dry-fly work in June and July.

  • Granite
Water quality (WFD)
  • EcologyModerate
  • ChemicalUnknown

WFD classification · FRHR317

The full read · show the working · for brown trout · confidence 75%
How the 77 is built — score × weight = contribution
Temperature88 × 28%24.6
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity54 × 12%6.5
Conditions total= 77
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Noireauproxy
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
  • Salmon11 March → 31 July
  • Sea trout11 March → 31 October
  • Trout2nd Saturday of March → 3rd Sunday of September

Salmon: Banned (2026) — Atlantic salmon fishing banned across the Seine-Normandie basin in 2026.

Sea trout: Banned (2026) — 0 declared sea trout in 2024. Effectively dead as a sea trout fishery.

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