Freestone · Granite · Normandy / Calvados-Manche

Vire

Vire — I follow rivers
Contributor photo

I follow rivers

Sjaak Kempe (https://www.flickr.com/photos/22991060@N04) - CC BY

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.

Marginal · Brown Trout
CDC Emerger · 16-18
Marginallive now
Slow going — pick your moments
River temperature is the limiting factor today, not the flow. Fish dawn or dusk if you go at all, and handle everything with extra care.
80% confidence
What moved it
  • LevelDry recentlyNo gauge reading
  • Water temp20.2°C
  • ClarityClear
Today’s fly
CDC Emerger
CDC Emerger16-18
Dead-drift
Conditions on the water
Estimate
Level
Dry recently
No gauge reading
Water temp20.2°C
ClarityClear
Weather21°C
WindNE 24 km/h
Pressure1018 hPa
Rain · recent0.5 mm
Rain · ahead8.8 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Water temperature for brown trout
Warm — slow
20°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
⚠️ Water at 20.2°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots. Otherwise poor — water clarity is in the right range.
Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey

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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 de pêche du Calvados et de la Manche
  • Quotas TAC applicables.
What's coming
Plan ahead
5-day outlook
Water here around 20°C. Nothing cooler within range — carry a thermometer.
Gallery · 2
  1. Vire — I follow rivers
    I follow rivers
  2. Terrain map of the venue
    Terrain map
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 80%
How the 26 is built — score × weight = contribution
Temperature23 × 28%6.4
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time75 × 13%9.8
Pressure80 × 7%5.6
Insect activity48 × 12%5.8
Limiting factor: Water temperature (20.2°C) is outside Brown Trout's preferred range (10–16°C)= 58
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
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.

Related guides
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