Spate · Granite · Corsica / Corse-du-Sud (Ajaccio hinterland), FR

Gravona

BocognanoGravona 2018-04

Mediterranean torrent flowing from central Corsican mountains to the west coast, steep, technical river where light bounces off white rock and the air carries salt.

Tomorrow · Closed season
Stonefly Nymph
Forecast · Tomorrow
Closed season
Out of season. Try elsewhere.
45% projected
Today's fly
Stonefly Nymph
Stonefly Nymph
Conditions on the water · Tomorrow
Live gauge
Level
Rising
2.44 m
Lifting fast
Water temp5.5°C
ClarityUnfishable
Weather10°C
WindN 9 km/h
Pressure1018 hPa
Rain · recent58.8 mm
Rain · ahead4.8 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
Cool — slow
6°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.
Likely species
Stoneflies
Hatch timeline · tomorrowPeak at 11am

12pm(now) — Autumn Needle Fly

Stage: Creeping nymphsApproach: Heavy nymphActivity: 22%

Peak activity at 11am — Autumn Needle Fly

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds 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 · November highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
March BrownHatch
2
3
2
Late March BrownHatch
2
3
2
Large Brook DunHatch
2
3
2
Large StoneflyHatch
2
3
2

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

Ranked for today
Brown Trout fly box

More balanced than the mountain-river pack. French nymphing still matters, but there is more room for dries, spiders and general searching flies.

Permits & access
Permit required — see local rules.
  • Corse-du-Sud regulations
  • Carte de pêche required
  • No-kill development active.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Restonica
18 km
0
Brown trout
Tavignano (Tavignanu)
25 km
0
Brown trout
Taravo (Taravu)
28 km
0
Brown trout
Golo (Golu)
33 km
0
Brown trout
Lac de Ninu
21 km
Brown trout
Gallery · 2
  1. BocognanoGravona 2018-04
  2. Terrain map of the venue
    Terrain map
About this water

Tight, cascading pocket water requiring short-line nymphing and small dry flies. Endemic Corsican trout (macrostigma lineage) in cold, oxygenated flows. Clear water, conservative fish, ethics-heavy approach. No-kill conservation developing. Check Corse-du-Sud regulations.

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

WFD classification · FRER39

The full read · show the working · for Brown Trout · confidence 75%
How the 0 is built — score × weight = contribution
Temperature33 × 28%9.2
Flow95 × 22%20.9
Clarity95 × 18%17.1
Feeding Time80 × 13%10.4
Pressure80 × 7%5.6
Insect activity37 × 12%4.4
Conditions total= 68
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Warmer water — toward the 10–16 °C ideal band — would lift the temperature score.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 2nd Saturday of March → 3rd Sunday of September
Related guides
Pyrenees PlaybookFrench riversEuro Nymphingsubsurface methods
Booking & contacts
At a glance

Gravona is a spate river in Corsica / Corse-du-Sud (Ajaccio hinterland), France. Its recorded elevation is about 558 m above sea level and the catchment geology is granite. The river is described as roughly 40 km long. The species listed for this water is brown trout. The trout season is recorded as running from 2nd Saturday of March to 3rd Sunday of September. Best window recorded for anglers: April–May, September–October. Core methods listed: Short-line nymphing; dry fly. Level and flow data for this water is linked from 1 gauge. Its Water Framework Directive ecological status is recorded as good. Access is recorded as day tickets through the local AAPPMA (angling association). Nearby waters in our listings include Restonica at 18 km, Lac de Ninu at 21 km and Tavignano (Tavignanu) at 25 km.