Spate · Mixed · Pyrénées-Atlantiques / Pays Basque

Nive

Photo of Nive
Contributor photo

Nive — image via Wikipedia (Nive)

No machine-readable author provided. Harrieta171 assumed (based on copyright claims). <CC BY-SA 3.0>, via Wikimedia Commons

The Nive is the salmon river of French Basque country, running with assured composure through mountains and beats where every family has fished for generations.

Poor · Brown Trout
CDC Emerger · 16-18
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.
80% confidence
What moved it
  • LevelDry recentlyNo gauge reading
  • Water temp21.4°C
  • ClarityClear
Today’s fly
CDC Emerger
CDC Emerger16-18
Dead-drift
Conditions on the water
Estimate
Level
Dry recently
No gauge reading
Water temp21.4°C
ClarityClear
Weather22°C
WindW 14 km/h
Pressure1017 hPa
Rain · recent0.0 mm
Rain · ahead3.5 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Water temperature for brown trout
Warm — slow
21°C est.ideal 1016°C
0°14°28°
How to fish it · for brown trout
When
Through the open trout season. Spring olives April through May; sedges through summer evenings; small dark flies into late September.
Where
Upper Nive through the Basque Pyrénées is tight pocket water; the middle river through Cambo widens. Pool tails and the seams behind boulders.
Method
Upstream dry to risers; dry-dropper through the riffles. The Nive's Basque water is clear — long leader, fine tippet.
Kit
9 ft #4 — French freestone default. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots.
Why this works
⚠️ Water at 21.4°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots. Otherwise very poor — water clarity is in the right range.
Hatch timeline · todayQuiet day

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Sub-surface · on the nymphunder the surface

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Beyond the hatch · worth watchingambient prey

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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 · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Salmon runRun
1
2
2
2
1
Trout seasonSeason
1
2
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.
  • Cartes de pêche AAPPMA basques
  • No-kill obligatoire certaines années — vérifiez auprès de la fédération locale.
What's coming
Plan ahead
5-day outlook
Water here around 21°C. Nothing cooler within range — carry a thermometer.
Gallery · 2
  1. Photo of Nive
    Nive — image via Wikipedia (Nive)
  2. Terrain map of the venue
    Terrain map
About this water

The Nive is the salmon river of French Basque country, running with assured composure through mountains and beats where every family has fished for generations. Spate-responsive—a five-hour lag from mountain rain to river rise—which means a competent angler can read the weather and plan the fishing with proper precision. Spring runs in April and May bring fish on the rising water; the finest fishing comes as the river clears and settles, when a tube of an inch or so gives way to small doubles that trout—including sea trout entering on the same flood—will take with conviction. The river carries the particular character of Basque fishing: serious, orderly, attended by men and women who understand that salmon angling is a discipline as much as a pursuit. Brown trout in the headwaters and tributaries offer orthodox dry-fly sport above Saint-Étienne-de-Baïgorry. Check the current AAPPMA arrêté—the Basque federations manage their waters with exactitude, and the regulations shift on a yearly basis.

  • Mixed
Water quality (WFD)
  • EcologyGood
  • ChemicalUnknown
What this classification means

WFD ecological status Moderate → Good corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody FRFR271C (was a stale earlier-cycle value). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.

WFD classification · FRFR271C

The full read · show the working · for brown trout · confidence 80%
How the 19 is built — score × weight = contribution
Temperature11 × 28%3.1
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity46 × 12%5.5
Limiting factor: Water temperature (21.4°C) is outside Brown Trout's preferred range (10–16°C)= 50
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
  • Salmon1 March → 31 July
  • Trout2nd Saturday of March → 3rd Sunday of September

Salmon: Banned (2026) — Adour-Gaves basin renewed salmon ban for 2026.

Sea trout: Seasonal open (2026) — Nive — the Basque river draining from the Pyrenees through Bayonne. Sea trout (truite de mer) confirmed as a seasonal quarry alongside salmon. Active sea trout fishery in the Basque Pyrénées-Atlantiques zone. Supersedes earlier 'verify_locally' provisional status.

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