Chalk · Normandy / Seine-Maritime (Coastal chalk stream)

Durdent

Durdent venue image
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Small Normandy chalk stream with quiet character and consistent flow.

Prime · Brown Trout
Spent Spinner · 16-20
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
  • Level0.30 m
  • Water temp15.2°C
  • ClarityClear
Today’s fly
Spent Spinner
Spent Spinner16-20
Upstream dry
Conditions on the water
Live gauge
Level
Steady
0.30 m
Water temp15.2°C
ClarityClear
Weather14°C
WindW 9 km/h
Pressure1023 hPa
Rain · recent0.8 mm
Rain · ahead0.6 mm

Live readings — water temperature is an estimate where the gauge does not record it.

Water temperature for brown trout
Ideal
15°C est.ideal 10–16°C
0°14°28°
How to fish it · for brown trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Why this works
Excellent — water temperature 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 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
Trout seasonSeason
1
2
2
2
2
2
1
Grayling seasonSeason
1
2
2
2
2
2
2
1
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
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 permits.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Arques
13 km
80
Brown trout · Grayling · Sea trout
Risle
19 km
Brown trout · Grayling
Normandy Chalk Streams (Private Estate Network)
21 km
Brown trout · Grayling
Scie
28 km
Brown trout · Grayling
Saâne
32 km
75
Brown trout · Grayling
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

Small Normandy chalk stream with quiet character and consistent flow. Wild brown trout and grayling respond to seasonal insect patterns. Clear water, stable temperature typical of chalk geology. Small flies required: olives and ephemeralids (16–18), sedges (14–16) in evening. Presentation matters more than fly choice. Some stretches private. Check access with local club.

  • Chalk
Water quality (WFD)
  • Ecology: Good
  • Chemical: Unknown

WFD classification · FRHR171

The full read · show the working · for brown trout · confidence 75%
How the 80 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity50 × 12%6.0
Conditions total= 80
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
  • Trout2nd Saturday of March → 3rd Sunday of September
  • Grayling3rd Saturday of May → 31 December
Related guides
Chalkstream Playbookchalk stream tacticsGrayling Playbookgrayling tacticsPyrenees PlaybookFrench rivers
Booking & contacts