Spate · Granite · North Bohemia / Liberec

Jizera

Jizera venue image
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A long trout and grayling river in the Giant Mountains area, offering more than 50 km of trout and grayling fishing.

Poor · Brown Trout
Czech Nymph · 10-14
Poorlive now
Not the day for it
River steady at a fishable height. Take your time — read the water before you cast.
80% confidence
What moved it
  • Level1.03 mLast reading 8h ago
  • Water temp20.9°C
  • ClarityClear
Today’s fly
Czech Nymph
Czech Nymph10-14
Euro-nymph
Conditions on the water
Live gauge
Level
Steady
1.03 m
lowspate
Water temp20.9°C
ClarityClear
Weather20°C
WindN 12 km/h
Pressure1019 hPa
Rain · recent2.1 mm
Rain · ahead13.0 mm

Live readings only. Trends shown where the gauge supports them.

Water temperature for brown trout
Warm — slow
20.9°Cideal 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 20.9°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots. Otherwise poor — water clarity is in the right range.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 4 active hatches hour by hour with Pro.

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Evidence
ModelledModerate confidence

Modelled from regional ecology — no survey or occurrence data for this water yet.

Through the year
0–3 scale · July 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
March BrownHatch
2
3
2
GrannomHatch
2
2
Large StoneflyHatch
2
3
2
Yellow SallyHatch
2
3
2

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

Ranked for today
Brown Trout fly box
Permits & access
Permit required — see local rules.
  • State licence + local permit
  • Brown trout protected Sep 1–Apr 15
  • Grayling protected Dec 1–Jun 15.
What's coming
Plan ahead
5-day outlook
Water here at 20.9°C. Nothing cooler within range.
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

A long trout and grayling river in the Giant Mountains area, offering more than 50 km of trout and grayling fishing. One of the more substantial destination-style river systems rather than just a short club stretch. Brown trout and introduced rainbow trout in fast mountain water over granite bedrock. Good pocket water and Czech nymphing territory — consistent sport in lovely water, best in spring and autumn.

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

WFD classification · CZHSL_1820

The full read · show the working · for brown trout · confidence 80%
How the 22 is built — score × weight = contribution
Temperature15 × 28%4.2
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity50 × 12%6.0
Limiting factor: Water temperature (20.9°C) is outside Brown Trout's preferred range (10–16°C)= 55
Can you trust it?
Water temperaturelive gauge readinggauge
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout16 April → 31 August
  • Grayling16 June → 30 November
Related guides
Grayling Playbookgrayling tacticsEuro Nymphingsubsurface methods
Booking & contacts