Limestone · Jura / Neuchâtel

Doubs

The Doubs river winding through a wooded limestone gorge near the Saut du Doubs on the Swiss-French border.

Jura limestone river forming part of the French-Swiss border, exceptional grayling fishing and wild brown trout in chalk stream character water.

Good · Brown Trout
Elk Hair Caddis · 12-16
Goodlive now
A proper day on the water
River high but settled. Match the colour and fish the seams.
90% confidence
What moved it
  • Level743.42 mLast reading 18h ago
  • Water temp17.1°C
  • ClarityClear
Today's fly
Elk Hair Caddis
Elk Hair Caddis12-16
Upstream dry
Conditions on the water
Live gauge
Level
Steady
743.42 m
Last reading 18h ago
Water temp17.1°C
ClarityClear
Weather21°C
WindNE 10 km/h
Pressure1023 hPa
Rain · recent0.0 mm
Rain · ahead5.5 mm

Live readings — water temperature is an estimate where the gauge does not record it.

Water temperature for Brown Trout
Warm — slow
17°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
Good — water clarity is right today, though time of day could be better.
Hatch timeline · todayPeak at 6am

Hatch predictions

Today's headline hatch shown — see all 9 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 3 with Pro.

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Evidence
Survey-backed · regionalModerate confidence

Backed by regional invertebrate surveys; no sampling on this exact reach yet.

Updated 3 hours ago

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
2
1
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Alpine RhithrogenaHatch
1
2
2
1
Large Dark OliveHatch
1
2
2
1

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

Ranked for today
Brown Trout fly box

A compact but high-quality Swiss box covering alpine streams, mountain lakes, and Jura salmonid rivers such as the Doubs.

SS
Small Streamer
6-10 · Pattern
Swing
Permits & access
Permit required — see local rules.
  • Franco-Swiss border river
  • Swiss patent required for Swiss sections, and French rules apply on the French side
  • Do not assume one roaming border permit.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Dessoubre
19 km
Brown trout · Grayling
Reverotte
21 km
4
Brown trout · Grayling
Doubs (France)
30 km
8
Brown trout · Grayling · Chub
Cusancin
40 km
4
Brown trout · Grayling
Les piscicultures Côte
51 km
Rainbow trout
Gallery · 2
  1. The Doubs river winding through a wooded limestone gorge near the Saut du Doubs on the Swiss-French border.
    The Doubs gorge near the Swiss-French border, Neuchâtel
  2. Terrain map of the venue
    Terrain map
About this water

Jura limestone river forming part of the French-Swiss border, exceptional grayling fishing and wild brown trout in chalk stream character water. Clear, alkaline flow with superb hatches. The French side has the Loue—a similar classic across the frontier.

  • Limestone
Water quality (WFD)
  • Ecology: Good
  • Chemical: Unknown
What this classification means

WFD ecological status Moderate → Good corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody FRDR635 (was a stale earlier-cycle value). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.

WFD classification · FRDR635

The full read · show the working · for Brown Trout · confidence 90%
How the 77 is built — score × weight = contribution
Temperature74 × 28%20.7
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity67 × 12%8.0
Conditions total= 77
Can you trust it?
Water temperatureair-to-water estimateestimated
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 MapsGoogle Maps
Seasons & zones
  • Trout 1 March → 30 September
Related guides
Grayling Playbookgrayling tacticsAlpine Streamsmountain entomologyEuro Nymphingsubsurface methods
Booking & contacts