Freestone · Granite · Alpes-Maritimes / Italy border

Roya

Roya terrain map
Terrain map

The Roya is a cross-border river: it rises at the Col de Tende on the French side of the Mercantour, runs south through Tende, Saorge and Breil-sur-Roya, then crosses into Italy and reaches the Mediterranean at Ventimiglia.

Marginal · Brown Trout
Small Perdigón · 16-20
Marginallive now
Slow going — pick your moments
River high but settled. Take your time — read the water before you cast.
55% confidence
What moved it
  • LevelProxyvia Arc (Bessans reach)
  • Water temp17.9°C
  • ClarityVery coloured
Today’s fly
Small Perdigón
Small Perdigón16-20
Euro-nymph
Conditions on the water
Proxy gauge
Level
Steady
Proxy
via Arc (Bessans reach)
Water temp17.9°C
ClarityVery coloured
Weather18°C
WindN 4 km/h
Pressure1017 hPa
Rain · recent0.0 mm
Rain · ahead4.8 mm

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

Water temperature for brown trout
Warm — slow
18°C est.ideal 1016°C
0°14°28°
How to fish it · for brown trout
When
Through the open trout season — the Roya runs from the Italian border down to the Mediterranean. Spring through summer evenings; autumn small flies.
Where
Pool tails and pocket water through the Mercantour-bordering valley. Maritime-Alps freestone — clear water, fast pockets.
Method
Upstream dry to risers; dry-dropper through the riffles. The water reads clear — long leader, fine tippet. Move slowly, cast accurately.
Kit
9 ft #4 — French freestone default. Floating line, 12 ft leader to 4 to 5 lb fluoro. Studded boots.
Why this works
Poor — river flow is working for you, but water clarity is the limiting factor today.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 6 active hatches hour by hour with Pro.

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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
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
Permits & access
Permit required — see local rules.
  • AAPPMA Alpes-Maritimes
  • Cross-border river — French carte on the French side; Italian permit required below the border at Ventimiglia.
What's coming
Plan ahead
5-day outlook
Other water nearby · 2
About this water

The Roya is a cross-border river: it rises at the Col de Tende on the French side of the Mercantour, runs south through Tende, Saorge and Breil-sur-Roya, then crosses into Italy and reaches the Mediterranean at Ventimiglia. The French section is about forty kilometres of classic high-altitude trout water — granite bedrock, fast pocket water, small wild brown trout, the whole thing hemmed in by the Mercantour peaks on one side and the Ligurian Alps on the other. Storm Alex in October 2020 hit the Roya valley almost as hard as the Vésubie. The main road between France and Italy was destroyed for months; villages were isolated; the river's course was reshaped in several reaches. Reconstruction is well advanced but the valley still carries the memory. For the angler, the fishing is back — the upper reaches above Saorge recovered quickly and the trout are once again holding in the pocket water where they always held. Late May onwards, short rod, and the same respect you would give any river that has been through something serious. The cross-border status adds a small administrative wrinkle: fish the French side with the French carte and remember that Italy is only a few kilometres downstream.

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

WFD ecological status Moderate → Good corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody FRDR74 (was a stale earlier-cycle value). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.

WFD classification · FRDR74

The full read · show the working · for brown trout · confidence 55%
How the 30 is built — score × weight = contribution
Temperature58 × 28%16.2
Flow80 × 22%17.6
Clarity15 × 18%2.7
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity47 × 12%5.6
Limiting factor: Water is very coloured — too coloured for Brown Trout= 53
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Arc (Bessans reach)proxy
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.
A drop and clear would lift the flow and clarity scores.
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
  • Trout2nd Saturday of March → 3rd Sunday of September
Related guides
Booking & contacts