Some sections in the national park core zone are catch-and-release or closed. Intimate pocket water fishing where solitude and clarity matter as much as the fish.
- Granite
Rules at a glance
- Licence required
Water temperature for Brown Trout
Cool — slow4°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.
Hatch timeline · tomorrowQuiet day
12pm(now) — Autumn Needle Fly
Stage: Creeping nymphsApproach: Heavy nymphActivity: 16%
Low insect activity predicted today
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 2 guilds as a supporter.
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 · November highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
1
Grayling seasonSeason
1
2
2
2
2
1
March BrownHatch
2
3
2
Late March BrownHatch
2
3
2
Large Brook DunHatch
2
3
2
Large StoneflyHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Brown Trout fly box
The most distinct national style here: Czech nymphing first, with short-line teams of 2 or 3 weighted nymphs central to trout and grayling fishing in fast rivers.
Permits & access
Permit required — see local rules.
- State licence + local permit.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
River Vydra, Sumava, Czech Republic Terrain map
About this water
The full read · show the working · for Brown Trout · confidence 75%
How the 0 is built — score × weight = contribution
Temperature37 × 28%10.4
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity43 × 12%5.2
Conditions total= 61
Can you trust it?
Water temperaturelive gauge readinggauge
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Warmer water — toward the 10–16 °C ideal band — would lift the temperature score.
Directions
Seasons & zones
- Trout 16 April → 31 August
- Grayling 16 June → 30 November
Czech national rule: grayling (lipan podhorní) protected 1 December – 15 June. Open window is 16 June – 30 November. Czech Anglers Union (ČRS) salmonid fisheries also have method and access rules — check the local ČRS district permit for specific conditions.
Closed in spring for spawning.
Prime sport 1 September → 30 November
Related guides
Booking & contacts
Vydra / Křemelná
Wild mountain streams in the heart of the Šumava National Park, brown trout in pristine boulder-strewn water.
Water temperature for Brown Trout
Cool — slow4°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.
Hatch timeline · tomorrowQuiet day
12pm(now) — Autumn Needle Fly
Stage: Creeping nymphsApproach: Heavy nymphActivity: 16%
Low insect activity predicted today
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 2 guilds as a supporter.
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 · November highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
1
Grayling seasonSeason
1
2
2
2
2
1
March BrownHatch
2
3
2
Late March BrownHatch
2
3
2
Large Brook DunHatch
2
3
2
Large StoneflyHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Brown Trout fly box
The most distinct national style here: Czech nymphing first, with short-line teams of 2 or 3 weighted nymphs central to trout and grayling fishing in fast rivers.
Permits & access
Permit required — see local rules.
- State licence + local permit.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
River Vydra, Sumava, Czech Republic Terrain map
About this water
Some sections in the national park core zone are catch-and-release or closed. Intimate pocket water fishing where solitude and clarity matter as much as the fish.
- Granite
The full read · show the working · for Brown Trout · confidence 75%
How the 0 is built — score × weight = contribution
Temperature37 × 28%10.4
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity43 × 12%5.2
Conditions total= 61
Can you trust it?
Water temperaturelive gauge readinggauge
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Warmer water — toward the 10–16 °C ideal band — would lift the temperature score.
Directions
Seasons & zones
- Trout 16 April → 31 August
- Grayling 16 June → 30 November
Czech national rule: grayling (lipan podhorní) protected 1 December – 15 June. Open window is 16 June – 30 November. Czech Anglers Union (ČRS) salmonid fisheries also have method and access rules — check the local ČRS district permit for specific conditions.
Closed in spring for spawning.
Prime sport 1 September → 30 November
Related guides
Booking & contacts
At a glance
Vydra / Křemelná is a spate river in South Bohemia / Šumava, Czech Republic. Its recorded elevation is about 1,116 m above sea level and the catchment geology is granite. The river is described as roughly 25 km long. The species listed for this water is brown trout. The trout season is recorded as running from 16 April to 31 August. The grayling season is recorded as running from 16 June to 30 November. Best window recorded for anglers: May–August. Core methods listed: Upstream nymph; Dry fly. Level and flow data for this water is linked from 2 gauges. Nearby waters in our listings include Teplá Vltava (Upper Vltava / Warm Vltava) at 22 km, Teplá Vltava (Upper Vltava / Warm Vltava) at 22 km and Otava 6 (Private Trophy Section) at 33 km.