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
Olive Klinkhamer
Forecast · Tomorrow
Closed season
Out of season. Try elsewhere.
45% projected
Today's fly
Olive Klinkhamer
Olive Klinkhamer
Conditions on the water · Tomorrow
Live gauge
Level
Rising
0.49 m
Lifting fast
Water temp15.8°C
ClarityUnfishable
Weather19°C
WindN 9 km/h
Pressure1025 hPa
Rain · recent0.0 mm
Rain · ahead11.1 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
Ideal
16°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
Caddisflies
Hatch timeline · tomorrowPeak at 6pm

12pm(now) — Reed Smut

Stage: On emergersApproach: Emerger or dryActivity: 52%
Also:Heather Fly43%Cinnamon Sedge33%Autumn Dun29%
Peak emergence windowWeather boost10 food groups active

Peak activity at 6pm — Evening Sedge (Evening Sedge, Weather boost)

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 3 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
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
Brown trout
Lac de Ninu
21 km
Brown trout
Tavignano (Tavignanu)
25 km
Brown trout
Taravo (Taravu)
28 km
Brown trout
Golo (Golu)
33 km
Brown trout
Gallery · 2
  1. BocognanoGravona 2018-04
  2. Terrain map of the venue
    Terrain map
About this water

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. 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 90%
How the 0 is built — score × weight = contribution
Temperature82 × 28%23.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time80 × 13%10.4
Pressure80 × 7%5.6
Insect activity76 × 12%9.1
Conditions total= 83
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 2nd Saturday of March → 3rd Sunday of September
Related guides
Pyrenees PlaybookFrench riversEuro Nymphingsubsurface methods
Booking & contacts