Small Ardennes tributary near the German border—intimate trout water with pocket water and short drifts perfect for a tight line. Wild brown trout with some stocking. Very flashy after rain when the slate geology drains fast.
- Slate
Rules at a glance
- Day tickets
Slow going — pick your moments
Low and clear — careful approach country. Cover and shadow are doing the work today.
55% confidence in this read
Live now
Conditions on the water
Trends shown where the gauge supports them
Level
Dry recently
No gauge reading
Water temp
4.6°C
Estimated
Clarity
Clear
Air temp
2°C
Wind
S 12 km/h
Gentle breeze
Pressure
1014 hPa
Rain · 48h
0.0 mm
No meaningful rain
Rain · ahead
6.6 mm
Light rain · next 48h
Live readings — water temperature is an estimate where the gauge does not record it.
How to fish · for brown trout
The brief
When · where · method · kit
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
Poor conditions. Clarity is favourable (95), Prey activity is weakest (17).
Hatches & runs
What's on, when
Twelve months at a glance
Through the year
0–3 scale · May highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
March BrownHatch
2
3
2
GrannomHatch
2
2
Large StoneflyHatch
2
3
2
Yellow SallyHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Today's fly · curated pack
Top pattern + the box
3 patterns from this venue's curated pack
Detail · next 12h
Water temperature & rain
The two readings most likely to move the verdict
Water temperature for brown trout
Cool — slow5°C est.ideal 10–16°C
0°14°28°
Evidence
Why today scores what it does
6 factors, signed
- Temperature1928% weight
- Flow6022% weight
- Clarity9518% weight
- Feeding Time4513% weight
- Pressure807% weight
- Prey Activity1712% weight
About this water
Holzwarche, end to end
Field guide · contributor-editedHolzwarche · about
What this water is
Background · character · contributors
About this water
Holzwarche · directions
How to get to the water
Directions
Holzwarche · zones
Where the rules change
Seasons · zones · per-species rules
Seasons & zones
- Trout3rd Saturday of March → 30 September
Holzwarche · permits
Licences, sorteo, the rules
Permits & access
Permit required — see local rules.
- Permis de pêche (Wallonia) / Visverlof (Flanders)
- Foreign anglers can purchase online or at post offices without residency.
Holzwarche
Google Places
Small Ardennes tributary near the German border—intimate trout water with pocket water and short drifts perfect for a tight line.
Species
Slow going — pick your moments
Low and clear — careful approach country. Cover and shadow are doing the work today.
55% confidence in this read
Water temperature for brown trout
Cool — slow5°C est.ideal 10–16°C
0°14°28°
Why this score · for brown trout
- Temperature1928% weight
- Flow6022% weight
- Clarity9518% weight
- Feeding Time4513% weight
- Pressure807% weight
- Prey Activity1712% weight
Conditions
Level
Dry recently
No gauge reading
Water temp
4.6°C
Estimated
Clarity
Clear
Air temp
2°C
Wind
S 12 km/h
Gentle breeze
Pressure
1014 hPa
Rain · 48h
0.0 mm
No meaningful rain
Rain · ahead
6.6 mm
Light rain · next 48h
Live readings — water temperature is an estimate where the gauge does not record it.
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
Poor conditions. Clarity is favourable (95), Prey activity is weakest (17).
Through the year
0–3 scale · May highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
March BrownHatch
2
3
2
GrannomHatch
2
2
Large StoneflyHatch
2
3
2
Yellow SallyHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Gallery · 1
Terrain map
Permits & access
Permit required — see local rules.
- Permis de pêche (Wallonia) / Visverlof (Flanders)
- Foreign anglers can purchase online or at post offices without residency.
Directions
About this water
Small Ardennes tributary near the German border—intimate trout water with pocket water and short drifts perfect for a tight line. Wild brown trout with some stocking. Very flashy after rain when the slate geology drains fast.
- Slate
Seasons & zones
- Trout3rd Saturday of March → 30 September
Other water nearby · 5
Booking & contacts