Freestone · Granite · South Bohemia / Šumava, CZ

Otava

Otava — File:View to Písek from Otava River (1).JPG

One of the major trout and grayling rivers in Šumava / South-West Bohemia, with about 30 km of fishable salmonid sections.

Marginal · Grayling
Pink Grayling Bug · Hook 16
Marginallive now
Slow going — pick your moments
Low and clear — careful approach country. Cover and shadow are doing the work today.
50% confidence
What moved it
  • Level0.31 m
  • Water temp12.8°C
  • ClarityClear
Today's fly
Pink Grayling Bug
Pink Grayling BugHook 16
in season · matches water height · all-rounder
Conditions on the water
Live gauge
Level
Steady
0.31 m
lowspate
Water temp12.8°C
ClarityClear
Weather12°C
WindE 12 km/h
Pressure1025 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Grayling
Ideal
13°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
Poor — water temperature is working for you, but river flow is the limiting factor today.
Likely species
Caddisflies
Gammarids
Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Supporters see what else is on the menu.

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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 · September 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
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Autumn OliveHatch
1
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 · matches water height
Permits & access
Permit required — see local rules.
  • State licence + local permit
  • Multiple quality sections with fly-only rule
  • 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
Otava 6 (Private Trophy Section)
5.0 km
Brown trout
Upper Vltava (Šumava)
22 km
Brown trout · Grayling
Vydra / Křemelná
28 km
Brown trout
Teplá Vltava (Upper Vltava / Warm Vltava)
30 km
Brown trout · Grayling
Blanice
44 km
Brown trout · Grayling
Gallery · 2
  1. Otava — File:View to Písek from Otava River (1).JPG
    File:View to Písek from Otava River (1).JPG
  2. Terrain map of the venue
    Terrain map
About this water

One of the major trout and grayling rivers in Šumava / South-West Bohemia, with about 30 km of fishable salmonid sections. The last salmonid stretches are predominantly grayling with some brown trout, while upper sections hold more trout. Mixed pools and riffles with character varying stretch to stretch. Methods range from dry and wet fly to nymphs and streamers. CzechNymph describes it as the most significant western Šumava fly river.

  • Granite
Water quality (WFD)
  • Ecology: Moderate
  • Chemical: Failing to achieve good

WFD classification · CZHVL_1250

The full read · show the working · for Grayling · confidence 50%
How the 30 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow15 × 22%3.3
Clarity85 × 18%15.3
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity26 × 12%3.1
Limiting factor: River is stable — Grayling prefers medium flow= 63
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
A drop and clear would lift the flow and clarity scores.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
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
Grayling Playbookgrayling tacticsEuro Nymphingsubsurface methods
Booking & contacts