Gammarids
- Ecology: Good
- Chemical: Unknown
WFD classification · FRHR345
Rules at a glance
- Permit required
Water temperature for Brown Trout
Ideal14°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Through the open trout season — opens 2nd Saturday of March; spring olives; sedges through summer; small dark flies into late September.
Where
Normandy chalk-stream character — pool tails, weeded glides, ranunculus runs. The Sée is intimate water; read it carefully.
Method
Upstream dry to spotted rising fish — long leader, fine tippet. The Sée's water is clear and demanding. Move slowly, cast accurately.
Kit
9 ft #4 — chalk-stream default. Floating line, 14 ft leader to 4 lb fluoro. Polarising glasses non-negotiable.
Likely species
Hatch timeline · todayPeak at 6 Uhr
Hatch predictions
Today's headline hatch shown — see all 11 active hatches hour by hour as a supporter.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Supporters see the full sub-surface read.
Start free trial14-day free trial. Cancel anytime.
Evidence
Survey-backed · regionalHigh confidence
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Sea trout runRun
1
2
2
2
2
2
2
1
Trout seasonSeason
1
2
2
2
2
2
1
Daddy Long LegsHatch
2
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
Fly box · Brown Trout
Permits & access
Permit required — see local rules.
- AAPPMA Sée / Fédération Manche
- Sea trout night fishing permitted in summer.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
Terrain map
Water quality (WFD)
The full read · show the working · for Brown Trout · confidence 90%
How the 0 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity51 × 12%6.1
Conditions total= 82
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
- Sea trout 11 March → 31 October
- Trout 2. Saturday im March → 3. Sunday im September
Salmon: Banned (2026) — Salmon fishing is closed throughout the Seine-Normandie basin, fresh and estuarine, under the 2026–27 basin order.
Sea trout: Negligible (2026) — 1 declared sea trout in 2024. Biologically present but rod catches negligible.
Related guides
Booking & contacts
Sée
Water temperature for Brown Trout
Ideal14°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Through the open trout season — opens 2nd Saturday of March; spring olives; sedges through summer; small dark flies into late September.
Where
Normandy chalk-stream character — pool tails, weeded glides, ranunculus runs. The Sée is intimate water; read it carefully.
Method
Upstream dry to spotted rising fish — long leader, fine tippet. The Sée's water is clear and demanding. Move slowly, cast accurately.
Kit
9 ft #4 — chalk-stream default. Floating line, 14 ft leader to 4 lb fluoro. Polarising glasses non-negotiable.
Likely species
Hatch timeline · todayPeak at 6 Uhr
Hatch predictions
Today's headline hatch shown — see all 11 active hatches hour by hour as a supporter.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Supporters see the full sub-surface read.
Start free trial14-day free trial. Cancel anytime.
Evidence
Survey-backed · regionalHigh confidence
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Sea trout runRun
1
2
2
2
2
2
2
1
Trout seasonSeason
1
2
2
2
2
2
1
Daddy Long LegsHatch
2
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
Fly box · Brown Trout
Permits & access
Permit required — see local rules.
- AAPPMA Sée / Fédération Manche
- Sea trout night fishing permitted in summer.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
Terrain map
Water quality (WFD)
- Ecology: Good
- Chemical: Unknown
WFD classification · FRHR345
The full read · show the working · for Brown Trout · confidence 90%
How the 0 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity51 × 12%6.1
Conditions total= 82
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
- Sea trout 11 March → 31 October
- Trout 2. Saturday im March → 3. Sunday im September
Salmon: Banned (2026) — Salmon fishing is closed throughout the Seine-Normandie basin, fresh and estuarine, under the 2026–27 basin order.
Sea trout: Negligible (2026) — 1 declared sea trout in 2024. Biologically present but rod catches negligible.
Related guides
Booking & contacts