Freestone · Mixed · Central Bohemia, CZ

Vltava 28

Photo of Vltava 28

One of the best trout fisheries in the country — fly-fishing only, barbless hooks only, with elevated takeable size limits for grayling and brown trout stricter than the national baseline.

Today · A proper day on the water
Czech Nymph
Forecast · Today
A proper day on the water
A proper day for it. Work the seams with an upstream nymph, switch to the dry when they show.
65% projected
Today's fly
Czech Nymph
Czech Nymph
Conditions on the water · Today
Estimate
Level
Light rain recently
No gauge reading
Water temp7.0°C
ClarityVery coloured
Weather3°C
WindN 22 km/h
Pressure1009 hPa
Rain · recent4.4 mm
Rain · ahead0.0 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Water temperature for Grayling
Ideal
7°C est.ideal 4–14°C
0°14°28°
How to fish it · for Grayling
When
Midday window — grayling feed best from late morning into early afternoon.
Where
Work runs and glides — grayling shoal in the bottom third of the water column.
Method
Tight-line nymph the bottom third with weighted patterns.
Kit
10 ft #3 rod, floating line, long leader to 4 lb fluoro for nymphs.
Why this works
Good — water temperature is working for you, but time of day is the limiting factor today. Grayling feeds actively in cold water — peak winter sport.
Likely species
Stoneflies
Gammarids
Hatch timeline · todayQuiet day

12pm(now) — Autumn Needle Fly

Stage: Creeping nymphsApproach: Heavy nymphActivity: 17%

Low insect activity predicted today

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 4 guilds as a supporter.

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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
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
2
2
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.

Ranked for today
Grayling 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.

Small Perdigón
Small Perdigón
Hook 14–18 · Fly
in season
Permits & access
Permit required — see local rules.
  • State licence (rybářský lístek) + local permit from ČRS branch
  • Fly-only, barbless hooks mandatory
  • Brown trout protected Sep 1–Apr 15
  • Grayling protected Dec 1–Jun 15.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Slapy Reservoir
9.0 km
Rainbow trout · Pike · Zander
Orlík Reservoir
21 km
Rainbow trout · Carp · Pike
Berounka
40 km
66
Chub · Barbel · Grayling
Blanice
51 km
61
Brown trout · Grayling
Otava
56 km
69
Brown trout · Grayling
Gallery · 2
  1. Photo of Vltava 28
    Vltava 28
  2. Terrain map of the venue
    Terrain map
About this water

Brown trout, rainbow trout and grayling in water where Czech nymphing was developed and perfected. A showcase fishery with beat-specific management that sets the standard for Czech quality-section regulation. WFD ecological status is 'Bad', likely reflecting upstream pressures on the wider Vltava rather than the managed fishery itself — the fly-only beats remain highly productive.

  • Mixed
Water quality (WFD)
  • Ecology: Bad
The full read · show the working · for Grayling · confidence 55%
How the 72 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time10 × 13%1.3
Pressure80 × 7%5.6
Insect activity32 × 12%3.8
Conditions total= 72
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Rainbow trout 16 April → 31 August
  • 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
Fly Fishing in Poland and the Czech Republicfeatured in this guideGrayling Playbookgrayling tacticsEuro Nymphingsubsurface methods
Booking & contacts
At a glance

Vltava 28 is a freestone river in Central Bohemia, Czech Republic. It sits at about 376 m above sea level. The river is described as roughly 30 km long. Species listed for this water: brown trout, rainbow trout and grayling. 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: Late April–June (spring trout); September–November (autumn grayling). Core methods listed: Czech nymph (competition style); Small dry flies; Upstream nymph. Its Water Framework Directive ecological status is recorded as bad. Nearby waters in our listings include Slapy Reservoir at 9.0 km, Orlík Reservoir at 21 km and Berounka at 40 km.