Freestone · Granite · Normandy / Calvados

Orne

Orne terrain map
Terrain map

The Orne is the central Calvados river, running from its source near Sées through the Suisse Normande gorges to the sea at Ouistreham.

Prime · Brown Trout
CDC Emerger · 16-18
Primelive now
About as good as it gets
Low and clear — careful approach country. Take your time — read the water before you cast.
75% confidence
What moved it
  • LevelProxyvia Noireau
  • Water temp15.3°C
  • ClarityClear
Today’s fly
CDC Emerger
CDC Emerger16-18
Dead-drift
Conditions on the water
Proxy gauge
Level
Steady
Proxy
via Noireau
Water temp15.3°C
ClarityClear
Weather17°C
WindNW 4 km/h
Pressure1025 hPa
Rain · recent0.0 mm
Rain · ahead0.2 mm

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

Water temperature for brown trout
Ideal
15°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; small dark flies into autumn.
Where
Pool tails and pocket water through the Calvados valley. Normandy spate freestone — fish 12 to 24 hours after rain.
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
Excellent — water temperature is right today, though insect activity could be better.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 10 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 Orne / Fédération Calvados
  • TAC quotas apply on salmon.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
About this water

The Orne is the central Calvados river, running from its source near Sées through the Suisse Normande gorges to the sea at Ouistreham. It is the classic mixed-species Normandy river: a weak but still extant Atlantic salmon run, reliable summer sea trout, and excellent wild brown trout through the middle and upper reaches. The Noireau, a major tributary, is gauged and provides a reliable proxy for conditions on the parent river. The salmon fishing is concentrated on the lower beats, particularly around Thury-Harcourt and the Suisse Normande gorges where the river slows through a series of deep, stone-walled pools. Spring fish run from March to June; fish them with floating line and long leader when the water is low, tubes when it carries colour. The sea trout fishing in the lower river is worth pursuing from late May through October, with night fishing the productive method during the summer peak. The upper trout water, above the Suisse Normande, is proper freestone fishing — granite pocket water, strong Baetis and caddis hatches, wild fish that respond to dry fly and nymph alike. Of the four Normandy salmon rivers in the Rise Daisy pack, the Orne offers the most variety across the season.

  • Granite
Water quality (WFD)
  • EcologyModerate
  • ChemicalUnknown

WFD classification · FRHR307

The full read · show the working · for brown trout · confidence 75%
How the 85 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time80 × 13%10.4
Pressure80 × 7%5.6
Insect activity49 × 12%5.9
Conditions total= 85
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Noireauproxy
Prey activitysurvey-backed invertebrate datasurvey
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: Open (2026) — Open in Calvados. Rod catches miserable (1 in 2024) but counter data (Feuguerolles-Bully: 440 sea trout 2024) shows genuine fish presence. Borderline but evidence-backed.

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