Freestone · Granite · South Bohemia / Šumava

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.

Poor · Brown Trout
Czech Nymph · 10-14
Poorlive now
Not the day for it
River temperature is the limiting factor today, not the flow. This is not the day to push it. Check the thermal advice above before you head out.
90% confidence
What moved it
  • Level0.28 mLast reading 17h ago
  • Water temp22.1°C
  • ClarityClear
Today's fly
Czech Nymph
Czech Nymph10-14
Euro-nymph
Conditions on the water
Live gauge
Level
Steady
0.28 m
lowspate
Water temp22.1°C
ClarityClear
Weather23°C
WindE 10 km/h
Pressure1027 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 Brown Trout
Warm — slow
22°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.
Why this works
Water at 22.1°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.
Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey

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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 · 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
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Autumn OliveHatch
1
2
1
GrannomHatch
1
1

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
  • 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
Cooler water nearby · 1
Probably above the Brown Trout safety line — these are likely cooler, but carry a thermometer.
Vydra / Křemelná
28 km
15.6°C
Brown trout
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 Brown Trout · confidence 90%
How the 12 is built — score × weight = contribution
Temperature6 × 28%1.7
Flow15 × 22%3.3
Clarity95 × 18%17.1
Feeding Time65 × 13%8.5
Pressure80 × 7%5.6
Insect activity22 × 12%2.6
Limiting factor: Water temperature (22.1°C) is outside Brown Trout's preferred range (10–16°C)= 39
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
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