Spate · Granite · North Bohemia / Liberec, CZ

Jizera

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

Lubor Ferenc - CC BY-SA 4.0

Forecast · Today

A side-water session, not the main event

A patient day. Fish the cover and stay with it.

55% projected

Notify when prime

Today's fly

Gold-Ribbed Hare's Ear

Rules at a glance

Licence required

Forecast

Conditions on the water · Today

Live gauge

Trends shown where the gauge supports them

Level

Steady

1.04 m

lowspate

Water temp

16.0°C

coldwarm

Clarity

Clear

Weather

16°C

Overcast

Wind

N 23 km/h

calmblown out

Pressure

1025 hPa

lowhigh

Rain · recent

0.0 mm

dryspate risk

Rain · ahead

0.0 mm

dryspate risk

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

Water temperature for Grayling

Warm — slow

16°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.

Likely species

Caddisflies

Green SedgeMost likelyLower confidenceNearest relative
#10–12–14–16 · Nymph
Free-living green caddis larva; fast stony riffles.
Net-spinning caddisAlso possibleLower confidenceNearest relative
#12–14–16 · Pupa
Widespread riffle net-spinner; evening emergence.
Large sedgesAlso possibleNearest relative
#8–10 · Adult
Big waked sedge in the last light and after dark.
CapererAlso possibleLower confidence
#10–12 · Adult
Big autumn sedge; fish dry at last light.

Gammarids

Freshwater shrimpMost likelyLower confidenceNearest relative
#10–14 · Adult
No hatch? Dead-drift a shrimp deep — the year-round standby.

Hatch timeline · todayPeak at 11am

12pm(now) — Reed Smut

Stage: On emergersApproach: Emerger or dryActivity: 95%

Also:Heather Fly59%Cinnamon Sedge52%Autumn Dun51%

Peak emergence window10 food groups active

Peak activity at 11am — Reed Smut (Reed Smut, Peak emergence window)

Sub-surface · on the nymphunder the surface

Hatch predictions

Supporters see the full sub-surface read.

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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

Trout season

Grayling season

March Brown

Late March Brown

Large Brook Dun

Large Stonefly

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

Hook 14–18 · Fly

in season · matches water height

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

Gallery · 2

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 Grayling · confidence 75%

How the 70 is built — score × weight = contribution

Temperature100 × 28%28.0

Flow60 × 22%13.2

Clarity85 × 18%15.3

Feeding Time25 × 13%3.3

Pressure80 × 7%5.6

Insect activity41 × 12%4.9

Conditions total= 70

Can you trust it?

Water temperaturelive gauge readinggauge

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 Maps Google 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

Booking & contacts

Spate · Granite · North Bohemia / Liberec, CZ

Jizera

Contributor photo

Lubor Ferenc - CC BY-SA 4.0

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

Today · A side-water session, not the main event

Gold-Ribbed Hare's Ear

Forecast · Today

A side-water session, not the main event

A patient day. Fish the cover and stay with it.

55% projected

Notify when prime

Today's fly

Gold-Ribbed Hare's Ear

Conditions on the water · Today

Live gauge

Level

Steady

1.04 m

lowspate

Water temp16.0°C

ClarityClear

Weather16°C

WindN 23 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

Warm — slow

16°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.

Likely species

Caddisflies

Green SedgeMost likelyLower confidenceNearest relative
#10–12–14–16 · Nymph
Free-living green caddis larva; fast stony riffles.
Net-spinning caddisAlso possibleLower confidenceNearest relative
#12–14–16 · Pupa
Widespread riffle net-spinner; evening emergence.
Large sedgesAlso possibleNearest relative
#8–10 · Adult
Big waked sedge in the last light and after dark.
CapererAlso possibleLower confidence
#10–12 · Adult
Big autumn sedge; fish dry at last light.

Gammarids

Freshwater shrimpMost likelyLower confidenceNearest relative
#10–14 · Adult
No hatch? Dead-drift a shrimp deep — the year-round standby.

Hatch timeline · todayPeak at 11am

12pm(now) — Reed Smut

Stage: On emergersApproach: Emerger or dryActivity: 95%

Also:Heather Fly59%Cinnamon Sedge52%Autumn Dun51%

Peak emergence window10 food groups active

Peak activity at 11am — Reed Smut (Reed Smut, Peak emergence window)

Sub-surface · on the nymphunder the surface

Hatch predictions

Supporters see the full sub-surface read.

Start free trial

14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Supporters see what else is on the menu.

Start free trial

14-day free trial. Cancel anytime.

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

Trout season

Grayling season

March Brown

Late March Brown

Large Brook Dun

Large Stonefly

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

Hook 14–18 · Fly

in season · matches water height

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

Gallery · 2

Terrain map

About this water

Granite

Water quality (WFD)

Ecology: Moderate
Chemical: Failing to achieve good

WFD classification · CZHSL_1820

The full read · show the working · for Grayling · confidence 75%

How the 70 is built — score × weight = contribution

Temperature100 × 28%28.0

Flow60 × 22%13.2

Clarity85 × 18%15.3

Feeding Time25 × 13%3.3

Pressure80 × 7%5.6

Insect activity41 × 12%4.9

Conditions total= 70

Can you trust it?

Water temperaturelive gauge readinggauge

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 Maps Google 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

Booking & contacts