Lowland · Mixed · Kujavia-Pomerania / Bydgoszcz, PL

Brda

Brda — The river Brda
Poor · Brown Trout
Parachute Adams · 14-18
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
  • Level173.00 mRising in the last 6h
  • Water temp24.4°C
  • ClarityClear
Today's fly
Parachute Adams
Parachute Adams14-18
Upstream dry
Conditions on the water
Live gauge
Level
Falling
173.00 m
Rising in the last 6h
Water temp24.4°C
ClarityClear
Weather27°C
WindSE 10 km/h
Pressure1016 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
Welfare risk
24°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 24.4°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.
Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 3 with Pro.

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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
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
Brown Trout fly box
Permits & access
Permit required — see local rules.
  • Polish fishing card plus local permit required.
What's coming
Plan ahead
5-day outlook
Water here around 24°C. Nothing cooler within range — carry a thermometer.
Gallery · 2
  1. Brda — The river Brda
    The river Brda
  2. Terrain map of the venue
    Terrain map
Water quality (WFD)
  • Ecology: Good
  • Chemical: Failing to achieve good
What this classification means

WFD re-coded 2026-06-18: prior id PLRW20002156789 was a fabricated stub (no such code in EEA WISE). Re-mapped to PLRW200011292999 'Brda od Zb Smukala do Ujscia' — the lower reach through Bydgoszcz near the venue coordinate (53.1276, 18.1338). Status: EEA WISE 2022 (3rd RBMP). Confidence: medium — VERIFY: if the intended fishery is the upper no-kill fly reach in Bory Tucholskie (Koronowo/Świt), re-map upstream (e.g. PLRW2000112929739). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu).

WFD classification · PLRW200011292999

The full read · show the working · for Brown Trout · confidence 90%
How the 0 is built — score × weight = contribution
Temperature0 × 28%0.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity39 × 12%4.7
Limiting factor: Water temperature (24.4°C) is outside Brown Trout's preferred range (10–16°C)= 54
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
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
  • 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

Related guides
Grayling Playbookgrayling tacticsEuro Nymphingsubsurface methods
Booking & contacts