Eastern Black Forest river, gentler gradient than the western streams with mixed brown trout and some rainbow. Club-managed beats with variable access. A river that rewards patient local knowledge.
- Sandstone
Rules at a glance
- Licence required
Water temperature for Brown Trout
Warm — slow20°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
Water at 20.3°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 8 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 2 guilds with Pro.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey
Hatch predictions
Top prey shown — see all 2 with Pro.
Start free trial14-day free trial. Cancel anytime.
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
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
Southern Germany only. Trout and grayling in Bavarian meadow streams, alpine creeks and famous upper-river systems.
6-10 · Pattern
Swing
Permits & access
Permit required — see local rules.
- Black Forest tributary
- Fischereischein + Erlaubnisschein required.
What's coming
Plan ahead
5-day outlook
Water here around 20°C. Nothing cooler within range — carry a thermometer.
Gallery · 2
Calw-Hirsau Nagold Terrain map
About this water
Water quality (WFD)
- Ecology: Moderate
- Chemical: Unknown
WFD classification · DERW_DEBW_44-01
The full read · show the working · for Brown Trout · confidence 80%
How the 26 is built — score × weight = contribution
Temperature21 × 28%5.9
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity61 × 12%7.3
Limiting factor: Water temperature (20.3°C) is outside Brown Trout's preferred range (10–16°C)= 59
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Murgproxy
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.
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
- Trout 1 March → 30 September
- Grayling 1 May → 31 December
Baden-Württemberg state rule: grayling (Äsche) closed 1 January – 30 April. Open season 1 May – 31 December. Individual fishing association (Fischereiverein) rules may apply. Always check the specific permit.
Season dates are set at state or regional level — confirm the local rules.
Prime sport 1 August → 30 November
Related guides
Booking & contacts
Nagold
Eastern Black Forest river, gentler gradient than the western streams with mixed brown trout and some rainbow.
Water temperature for Brown Trout
Warm — slow20°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
Water at 20.3°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 8 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 2 guilds with Pro.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey
Hatch predictions
Top prey shown — see all 2 with Pro.
Start free trial14-day free trial. Cancel anytime.
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
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
Southern Germany only. Trout and grayling in Bavarian meadow streams, alpine creeks and famous upper-river systems.
6-10 · Pattern
Swing
Permits & access
Permit required — see local rules.
- Black Forest tributary
- Fischereischein + Erlaubnisschein required.
What's coming
Plan ahead
5-day outlook
Water here around 20°C. Nothing cooler within range — carry a thermometer.
Gallery · 2
Calw-Hirsau Nagold Terrain map
About this water
Eastern Black Forest river, gentler gradient than the western streams with mixed brown trout and some rainbow. Club-managed beats with variable access. A river that rewards patient local knowledge.
- Sandstone
Water quality (WFD)
- Ecology: Moderate
- Chemical: Unknown
WFD classification · DERW_DEBW_44-01
The full read · show the working · for Brown Trout · confidence 80%
How the 26 is built — score × weight = contribution
Temperature21 × 28%5.9
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity61 × 12%7.3
Limiting factor: Water temperature (20.3°C) is outside Brown Trout's preferred range (10–16°C)= 59
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Murgproxy
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.
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
- Trout 1 March → 30 September
- Grayling 1 May → 31 December
Baden-Württemberg state rule: grayling (Äsche) closed 1 January – 30 April. Open season 1 May – 31 December. Individual fishing association (Fischereiverein) rules may apply. Always check the specific permit.
Season dates are set at state or regional level — confirm the local rules.
Prime sport 1 August → 30 November
Related guides
Booking & contacts