Reservoir · Mixed · Central Bohemia

Slapy Reservoir

Slapy Reservoir — Panorama of lake Slapy near Prague on river Vltava
Good · Trout
Pheasant tail nymph · 14–16
Goodlive now
Evening session looks promising at Slapy Reservoir
Water temperature is the limiting factor today, not the wave. Fish dawn or dusk if you go at all, and handle everything with extra care.
65% confidence
What moved it
  • WindE 10 km/hLight breeze
Today's fly
Pheasant tail nymph
Pheasant tail nymph14–16
Search the runs and pockets, dead-drift near the bottom.
Conditions on the water
Live gauge
Wind
Light breeze
E 10 km/h
N
E
from the east
Wave20 cm ripple
Water temp—
Air temp23°C
CloudClear
Pressure1018 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Trout
When
Current conditions suit Slapy Reservoir well for summer tactics. The ripple should help fish move and feed more confidently. Very warm conditions — trout have a narrower safe zone of cool, oxygen-rich water. Fish only at first light or last light, use barbless hooks, keep fish in the water during release, and stop if fish struggle to recover. Evening can bring a surface rise — have a dry fly or emerger ready.
Where
Start with Pheasant tail nymph (12-14) on a slow, natural presentation — check locally for the preferred method. As evening approaches, switch to dries or emergers if you see surface activity.
The plan
Plan A

Start with Pheasant tail nymph (12-14) on a slow, natural presentation — check locally for the preferred method. As evening approaches, switch to dries or emergers if you see surface activity.

Plan B

Fish early and late, try deeper during the heat of the day with a fast-sinking line.

Watch for

Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.

Boat — drift

A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 5 with Pro.

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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
1
Grayling seasonSeason
1
2
2
2
2
1
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Reservoir BuzzerHatch
2
3
3
3
3
3
2
Lake OliveHatch
2
3
3
3
3
3
2
Silverhorns & LonghornsHatch
1
2
2
2
1

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Trout fly box
BS
Brown streamer
8–10 · Streamer
Strip it for fish chasing fry or in coloured water.
PS
Pike streamer
8–10 · Streamer
Strip it for fish chasing fry or in coloured water.
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.
What's coming
Plan ahead
5-day outlook
Condition match
79%
Cloud70%
Wind100%
Temp60%

A good match for Slapy Reservoir — most conditions are close to what it fishes best in.

Other water nearby · 3
Vltava 28
9.0 km
Brown trout · Rainbow trout · Grayling
Berounka
28 km
0
Chub · Barbel · Grayling
Orlík Reservoir
30 km
Rainbow trout · Carp · Pike
Gallery · 2
  1. Slapy Reservoir — Panorama of lake Slapy near Prague on river Vltava
    Panorama of lake Slapy near Prague on river Vltava
  2. Terrain map of the venue
    Terrain map
Why this score
  • Wind conditions (ripple) closely match what this water fishes best in.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 16 April → 31 August
  • Grayling 16 June → 30 November
Related guides
Small Stillwater Playbookstillwater tacticsThermal Layers & Troutreading depth and temperatureEuro Nymphingsubsurface methods
Booking & contacts