Freestone · Granite · Alpes-Maritimes / Mercantour, FR

Vésubie

Vésubie venue image

The Vésubie is a short, steep Mercantour river that rises at the Col de Fenestre on the Italian border and runs south through Saint-Martin-Vésubie, Roquebillière and Lantosque before joining the Var.

Poor · Brown Trout
Hare's Ear Nymph · 14-16
Closed season
Out of season. Try elsewhere.
Closed — confidence not applicable today.
What moved it
  • LevelProxyvia Arc
  • Water temp18.3°C
  • ClarityClear
Today's fly
Hare's Ear Nymph
Hare's Ear Nymph14-16
Upstream
Conditions on the water
Proxy gauge
Level
Steady
Proxy
via Arc
Water temp18.3°C
ClarityClear
Weather23°C
WindS 12 km/h
Pressure1025 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

No gauge on this water — conditions are inferred from Arc. The trend transfers, the absolute level does not.

Water temperature for Brown Trout
Warm — slow
18°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 18.3°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots.
Likely species
Hatch timeline · todayPeak at 11am

Hatch predictions

Today's headline hatch shown — see all 9 active hatches hour by hour as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 4 as a supporter.

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Evidence
Survey-backed · regionalHigh confidence

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

Through the year
0–3 scale · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
Alpine RhithrogenaHatch
2
3
3
2
Sculpin / Baitfish (Rivers)Hatch
2
3
3
3
3
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1

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

Ranked for today
Brown Trout fly box

French nymph-first water. Fast current, technical presentation, weighted nymphs and emergers, with dry flies when fish rise.

Permits & access
Permit required — see local rules.
  • AAPPMA Alpes-Maritimes
  • Storm Alex reconstruction ongoing — check access and parcours availability before travelling.
What's coming
Plan ahead
5-day outlook
Water here around 18°C. Nothing cooler within range — carry a thermometer.
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

The Vésubie is a short, steep Mercantour river that rises at the Col de Fenestre on the Italian border and runs south through Saint-Martin-Vésubie, Roquebillière and Lantosque before joining the Var. It is the kind of high alpine trout water that looks like it should be somewhere much further north than Provence — pines, cold water, granite boulders, wild brown trout in the clean pockets. Storm Alex in October 2020 hit the Vésubie valley harder than anywhere else in the Mercantour. Saint-Martin-Vésubie, Roquebillière and the hamlets along the river were devastated; dozens of people died across the Tinée, Vésubie and Roya valleys that night; the reconstruction is still going on more than five years later. The river itself has largely recovered hydrologically, though some reaches were entirely rebuilt, and the trout populations have begun to come back. Fish the Vésubie with a sense of proportion. It is still beautiful and it is still productive, but the people who live in the valley have been through something most of us have not, and a bit of respect for that goes a long way. Late May onwards, short rod, careful wading. The best fishing is above Saint-Martin-Vésubie in the headwater valleys.

  • Granite
Water quality (WFD)
  • Ecology: Good
  • Chemical: Unknown

WFD classification · FRDR80

The full read · show the working · for Brown Trout · confidence 80%
How the 0 is built — score × weight = contribution
Temperature36 × 28%10.1
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity67 × 12%8.0
Conditions total= 66
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Arcproxy
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
  • Trout 2nd Saturday of March → 3rd Sunday of September
Related guides
Booking & contacts