Mayflies
Caddisflies
Baltic-draining river in northwestern Poland, grayling and sea trout in clear lowland water. One of the grayling rivers of the northern Polish/Pomeranian lake district.
- Mixed
Rules at a glance
- Free fishing
- Fly only
Water temperature for Grayling
Warm — slow17°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
Fair — time of day is working for you, but water temperature is the limiting factor today.
Likely species
Caddisflies
- Net-spinning caddisMost likelyLower confidenceNearest relative#12–14–16 · PupaWidespread riffle net-spinner; evening emergence.
- CapererAlso possibleLower confidence#10–12 · AdultBig autumn sedge; fish dry at last light.
- Green SedgeAlso possibleLower confidenceNearest relative#10–12–14–16 · NymphFree-living green caddis larva; fast stony riffles.
- Large sedgesAlso possibleNearest relative#8–10 · AdultBig waked sedge in the last light and after dark.
Hatch timeline · todayQuiet day
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour as a supporter.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 4 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 5 as a supporter.
Start free trial14-day free trial. Cancel anytime.
Evidence
Records-basedModerate confidence
Based on species-occurrence records, not local invertebrate surveys.
Through the year
0–3 scale · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Sea trout runRun
1
2
2
2
2
2
2
2
1
Trout seasonSeason
1
2
2
2
2
1
Grayling seasonSeason
2
1
1
2
2
2
2
2
2
Terrestrial BeetlesHatch
2
3
3
2
Blue Winged OliveHatch
1
2
2
2
2
1
Black MidgeHatch
1
2
2
2
2
2
2
2
2
2
2
1
Summer River MidgeHatch
1
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Grayling fly box
Southern Polish trout and grayling rivers led by the Dunajec model: nymphing by day, dry fly in the evening, streamer as support.
Hook 14–18 · Fly
in season · matches water height
Permits & access
Permit required — see local rules.
- Polish fishing card plus local permit required
- Baltic-river sections may have additional migratory-fish regulations—check with local PZW district.
What's coming
Plan ahead
5-day outlook
Fishing better nearby · 1
Gallery · 2
Łeba Fishermen 2 Terrain map
About this water
Water quality (WFD)
- Ecology: Moderate
- Chemical: Failing to achieve good
What this classification means
WFD re-coded 2026-06-18: prior id PLRW20001247456 was a fabricated stub (no such code in EEA WISE). Re-mapped to PLRW20001147639 'Leba od Debnicy do Pogorzelicy' — the middle reach (through Lębork) nearest the venue coordinate (54.67234, 17.42156). Status: EEA WISE 2022 (3rd RBMP). Confidence: low-medium — VERIFY the fished stretch against a map; the Łeba has four reaches between Dębnica and Lake Łebsko. Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu).
WFD classification · PLRW20001147639
The full read · show the working · for Grayling · confidence 75%
How the 40 is built — score × weight = contribution
Temperature20 × 28%5.6
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time90 × 13%11.7
Pressure80 × 7%5.6
Insect activity73 × 12%8.8
Limiting factor: Water temperature (16.5°C) is outside Grayling's preferred range (4–14°C)= 65
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
Cooler water — back toward the 4–14 °C ideal band — would lift the score and ease welfare.
Directions
Seasons & zones
- Sea trout 1 January → 30 September
Polish PZW rules list sea trout/troć closed in remaining rivers from 1 October to 31 December. Local river and district rules may add method/day restrictions, so this should be a default pending river-specific PZW checks.
- Trout 1 April → 30 September
- Grayling 1 June → 28 February
Polish PZW national rule: grayling (lipień) protected 1 March – 31 May. Open window 1 June – 28 February. PZW district and water-specific rules may add tighter restrictions. Carpathian rivers (San, Dunajec, Biała, Skawa, Raba) hold excellent grayling — check local Okręg PZW district permit for specific conditions.
Closed in spring for spawning.
Prime sport 1 September → 30 November
Sea trout: Variable seasonal (2026)
Related guides
Booking & contacts
Łeba
Baltic-draining river in northwestern Poland, grayling and sea trout in clear lowland water.
Water temperature for Grayling
Warm — slow17°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
Fair — time of day is working for you, but water temperature is the limiting factor today.
Likely species
Caddisflies
- Net-spinning caddisMost likelyLower confidenceNearest relative#12–14–16 · PupaWidespread riffle net-spinner; evening emergence.
- CapererAlso possibleLower confidence#10–12 · AdultBig autumn sedge; fish dry at last light.
- Green SedgeAlso possibleLower confidenceNearest relative#10–12–14–16 · NymphFree-living green caddis larva; fast stony riffles.
- Large sedgesAlso possibleNearest relative#8–10 · AdultBig waked sedge in the last light and after dark.
Hatch timeline · todayQuiet day
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour as a supporter.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 4 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 5 as a supporter.
Start free trial14-day free trial. Cancel anytime.
Evidence
Records-basedModerate confidence
Based on species-occurrence records, not local invertebrate surveys.
Through the year
0–3 scale · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Sea trout runRun
1
2
2
2
2
2
2
2
1
Trout seasonSeason
1
2
2
2
2
1
Grayling seasonSeason
2
1
1
2
2
2
2
2
2
Terrestrial BeetlesHatch
2
3
3
2
Blue Winged OliveHatch
1
2
2
2
2
1
Black MidgeHatch
1
2
2
2
2
2
2
2
2
2
2
1
Summer River MidgeHatch
1
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Grayling fly box
Southern Polish trout and grayling rivers led by the Dunajec model: nymphing by day, dry fly in the evening, streamer as support.
Hook 14–18 · Fly
in season · matches water height
Permits & access
Permit required — see local rules.
- Polish fishing card plus local permit required
- Baltic-river sections may have additional migratory-fish regulations—check with local PZW district.
What's coming
Plan ahead
5-day outlook
Fishing better nearby · 1
Gallery · 2
Łeba Fishermen 2 Terrain map
About this water
Baltic-draining river in northwestern Poland, grayling and sea trout in clear lowland water. One of the grayling rivers of the northern Polish/Pomeranian lake district.
- Mixed
Water quality (WFD)
- Ecology: Moderate
- Chemical: Failing to achieve good
What this classification means
WFD re-coded 2026-06-18: prior id PLRW20001247456 was a fabricated stub (no such code in EEA WISE). Re-mapped to PLRW20001147639 'Leba od Debnicy do Pogorzelicy' — the middle reach (through Lębork) nearest the venue coordinate (54.67234, 17.42156). Status: EEA WISE 2022 (3rd RBMP). Confidence: low-medium — VERIFY the fished stretch against a map; the Łeba has four reaches between Dębnica and Lake Łebsko. Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu).
WFD classification · PLRW20001147639
The full read · show the working · for Grayling · confidence 75%
How the 40 is built — score × weight = contribution
Temperature20 × 28%5.6
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time90 × 13%11.7
Pressure80 × 7%5.6
Insect activity73 × 12%8.8
Limiting factor: Water temperature (16.5°C) is outside Grayling's preferred range (4–14°C)= 65
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
Cooler water — back toward the 4–14 °C ideal band — would lift the score and ease welfare.
Directions
Seasons & zones
- Sea trout 1 January → 30 September
Polish PZW rules list sea trout/troć closed in remaining rivers from 1 October to 31 December. Local river and district rules may add method/day restrictions, so this should be a default pending river-specific PZW checks.
- Trout 1 April → 30 September
- Grayling 1 June → 28 February
Polish PZW national rule: grayling (lipień) protected 1 March – 31 May. Open window 1 June – 28 February. PZW district and water-specific rules may add tighter restrictions. Carpathian rivers (San, Dunajec, Biała, Skawa, Raba) hold excellent grayling — check local Okręg PZW district permit for specific conditions.
Closed in spring for spawning.
Prime sport 1 September → 30 November
Sea trout: Variable seasonal (2026)
Related guides
Booking & contacts