Large Vltava reservoir south of Prague and a well-known recreational and mixed-species fishery. Fly fishing and boat fishing are permitted and the official fishery card allows retention of rainbow trout and brook char, but the evidence does not support presenting Slapy as a serious Czech trout destination; its identity is primarily that of a broad non-salmonid reservoir.
Rules at a glance
- Free fishing
Reasonable late spring fishing likely at Slapy Reservoir
Good wave on — drift country. A useful wave. Work the productive shore.
Conditions are not ideal but fishable at Slapy Reservoir. The ripple should help fish move and feed more confidently.
53% confidence in this read
Live now
Conditions on the water
Trends shown where the gauge supports them
Wind
NW 5 km/h
Calm
Wave
Ripple
Water temp
—
No reading
Air temp
6°C
Cloud
Broken
Pressure
—
Rain · 24h
0.0 mm
No rain
Some readings unavailable — check directly before fishing.
How to fish · for brown trout
The brief
When · where · method · kit
How to fish it · for brown trout
When
Conditions are not ideal but fishable at Slapy Reservoir. The ripple should help fish move and feed more confidently.
Where
Start with Buzzer (14-16) on a slow figure-of-eight or hang under indicator. If that does not produce, switch depth or speed before changing the pattern entirely. When no hatch is visible, a buzzer team — black stripped quill on the point, attractor or pearl-rib on the top dropper — is the default starting point on any UK stillwater.
Method
Method not yet authored.
Kit
Kit not yet authored.
Today's tactical plan
The plan
Plan A · Plan B · what to watch · bank or boat
The plan
Plan A
Start with Buzzer (14-16) on a slow figure-of-eight or hang under indicator. If that does not produce, switch depth or speed before changing the pattern entirely. When no hatch is visible, a buzzer team — black stripped quill on the point, attractor or pearl-rib on the top dropper — is the default starting point on any UK stillwater.
Plan B
If fish refuse on top, drop to a buzzer under an indicator at different depths.
Watch for
Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.
Boat — drift
A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.
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
1
Grayling seasonSeason
1
2
2
2
2
1
Large Dark OliveHatch
1
2
2
1
March BrownHatch
1
2
1
Iron BlueHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
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
Evidence
Why today scores what it does
The factors driving today's verdict
Why this score
- Wind conditions (ripple) closely match what this water fishes best in.
Detail · next 12h
Precipitation
The reading most likely to move tomorrow's verdict
About this water · Lough note · 4 min read
Slapy Reservoir · profile
Who this water suits
Strengths · watch-outs · best for
About this water
Slapy Reservoir, on the water
Field guide · contributor-editedSlapy Reservoir · about
What this water is
Background · character · contributors
About this water
Large Vltava reservoir south of Prague and a well-known recreational and mixed-species fishery. Fly fishing and boat fishing are permitted and the official fishery card allows retention of rainbow trout and brook char, but the evidence does not support presenting Slapy as a serious Czech trout destination; its identity is primarily that of a broad non-salmonid reservoir.
- Lake
- Mixed
Slapy Reservoir · directions
How to get to the water
Directions
Slapy Reservoir · zones
Where the rules change
Seasons · zones · per-species rules
Seasons & zones
- Trout16 April → 31 August
- Grayling16 June → 30 November
Slapy Reservoir · permits
Licences, sorteo, the rules
Permits & access
Permit required — see local rules.
- State licence plus local reservoir permit required
- Trout presence is variable, so confirm current stocking and target species with the local authority before planning a dedicated salmonid trip.
Slapy Reservoir
Google Places
Large Vltava reservoir south of Prague and a well-known recreational and mixed-species fishery.
Species
Reasonable late spring fishing likely at Slapy Reservoir
Good wave on — drift country. A useful wave. Work the productive shore.
Conditions are not ideal but fishable at Slapy Reservoir. The ripple should help fish move and feed more confidently.
53% confidence in this read
Conditions
Wind
NW 5 km/h
Calm
Wave
Ripple
Water temp
—
No reading
Air temp
6°C
Cloud
Broken
Pressure
—
Rain · 24h
0.0 mm
No rain
Some readings unavailable — check directly before fishing.
Condition match
69%
Cloud70%
Wind100%
Temp25%
A reasonable day here, though temperature isn't quite in the sweet spot.
How to fish it · for brown trout
When
Conditions are not ideal but fishable at Slapy Reservoir. The ripple should help fish move and feed more confidently.
Where
Start with Buzzer (14-16) on a slow figure-of-eight or hang under indicator. If that does not produce, switch depth or speed before changing the pattern entirely. When no hatch is visible, a buzzer team — black stripped quill on the point, attractor or pearl-rib on the top dropper — is the default starting point on any UK stillwater.
Method
Method not yet authored.
Kit
Kit not yet authored.
The plan
Plan A
Start with Buzzer (14-16) on a slow figure-of-eight or hang under indicator. If that does not produce, switch depth or speed before changing the pattern entirely. When no hatch is visible, a buzzer team — black stripped quill on the point, attractor or pearl-rib on the top dropper — is the default starting point on any UK stillwater.
Plan B
If fish refuse on top, drop to a buzzer under an indicator at different depths.
Watch for
Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.
Boat — drift
A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.
Why this score
- Wind conditions (ripple) closely match what this water fishes best in.
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
1
Grayling seasonSeason
1
2
2
2
2
1
Large Dark OliveHatch
1
2
2
1
March BrownHatch
1
2
1
Iron BlueHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Gallery · 1
Terrain map
Permits & access
Permit required — see local rules.
- State licence plus local reservoir permit required
- Trout presence is variable, so confirm current stocking and target species with the local authority before planning a dedicated salmonid trip.
Directions
About this water
Large Vltava reservoir south of Prague and a well-known recreational and mixed-species fishery. Fly fishing and boat fishing are permitted and the official fishery card allows retention of rainbow trout and brook char, but the evidence does not support presenting Slapy as a serious Czech trout destination; its identity is primarily that of a broad non-salmonid reservoir.
- Lake
- Mixed
Seasons & zones
- Trout16 April → 31 August
- Grayling16 June → 30 November
About this water · Lough note · 4 min read
Large Vltava reservoir south of Prague and a well-known recreational and mixed-species fishery. Fly fishing and boat fishing are permitted and the official fishery card allows retention of rainbow trout and brook char, but the evidence does not support presenting Slapy as a serious Czech trout destination; its identity is primarily that of a broad non-salmonid reservoir.
Other water nearby · 3
Booking & contacts