Coastal · Alluvial · Netherlands / North Sea coast

Dutch coast sea-trout (specialist)

Dutch coast sea-trout (specialist) — Workshop-Landschapsfotografie-Zeeuwse-Kust
Poor · Brown Trout
Damsel Nymph · 10-12
Poorlive now
Not the day for it
River temperature is the limiting factor today, not the flow. This is not the day to push it. Check the thermal advice above before you head out.
80% confidence
What moved it
  • Level0.25 mDropping after lift
  • Water temp21.5°C
  • ClarityClear
Today's fly
Damsel Nymph
Damsel Nymph10-12
Retrieve
Conditions on the water
Live gauge
Level
Falling
0.25 m
Dropping after lift
Water temp21.5°C
ClarityClear
Weather21°C
WindN 13 km/h
Pressure1015 hPa
Rain · recent0.0 mm
Rain · ahead1.8 mm

Live readings only. Trends shown where the gauge supports them.

Water temperature for Brown Trout
Warm — slow
21.5°Cideal 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
Water at 21.5°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots.
Hatch timeline · todayPeak at 6pm

Hatch predictions

Today's headline hatch shown — see all 9 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 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 · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
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.
  • VISpas available to non-residents
  • Can be purchased online or from tackle shops
  • Valid for most affiliated waters nationwide.
What's coming
Plan ahead
5-day outlook
Water here at 21.5°C. Nothing cooler within range.
Gallery · 2
  1. Dutch coast sea-trout (specialist) — Workshop-Landschapsfotografie-Zeeuwse-Kust
    Workshop-Landschapsfotografie-Zeeuwse-Kust
  2. Terrain map of the venue
    Terrain map
The full read · show the working · for Brown Trout · confidence 80%
How the 18 is built — score × weight = contribution
Temperature10 × 28%2.8
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity62 × 12%7.4
Limiting factor: Water temperature (21.5°C) is outside Brown Trout's preferred range (10–16°C)= 60
Can you trust it?
Water temperaturelive gauge readinggauge
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
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 March → 30 September

Sea trout: Variable seasonal (2026)

Related guides
Euro Nymphingsubsurface methods
Booking & contacts