Stillwater · Peat · Outer Hebrides / Lewis

Loch Roag System

Loch Roag System terrain map
Terrain map

A complex interconnected loch system on Lewis's Atlantic coast, where fresh and salt water mix in a landscape of extraordinary beauty.

Species

Marginal — persistence required

Low and clear — careful approach country. Hard going on bright water. Favour cloud and shadow.

50% confidence in this read
Water temperature for atlantic salmon
Cool — slow
6°C est.ideal 10–14°C
0°14°28°
Why this score · for atlantic salmon
  • Temperature1330% weight
  • Flow4525% weight
  • Clarity9520% weight
  • Feeding Time1015% weight
  • Pressure8510% weight
Conditions
Level
Dry recently
No gauge reading
Water temp
5.5°C
Estimated
Clarity
Clear
Air temp
6°C
Wind
S 8 km/h
Light breeze
Pressure
1001 hPa
Rain · 48h
0.0 mm
No meaningful rain
Rain · ahead
6.0 mm
Light rain · next 48h

Live readings — water temperature is an estimate where the gauge does not record it.

How to fish it · for atlantic salmon
When
All day — lough fishing is best in a good wave. Early morning and evening can produce in calm conditions.
Where
Work the drift lanes from the upwind shore across the productive zones. Cover bay edges, underwater reefs, and any areas where the bottom shoals.
Method
Fish a sensible line-and-fly combination for the height and pace of water.
Kit
10 ft #7/8 single-hander, floating line, 10–12 lb fluoro leader. Boat seat and waterproofs for the drift.
Why this works
Poor conditions. Clarity is favourable (95), Feeding time is weakest (10).
Through the year
0–3 scale · May highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Salmon runRun
1
2
2
2
2
2
2
2
1
Trout seasonSeason
1
2
2
2
2
2
2
1
Large Dark OliveHatch
1
2
2
1
March BrownHatch
1
2
1
Iron BlueHatch
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.

Permits & access
Permit required — see local rules.
  • Multiple estates and clubs control different sections
  • FishHebrides is the best starting point for booking
  • Tide tables essential for sea pool timing.
Directions
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About this water

A complex interconnected loch system on Lewis's Atlantic coast, where fresh and salt water mix in a landscape of extraordinary beauty. The system includes several linked lochs feeding into the sea loch of Roag. Salmon and sea trout enter the system from spring onwards and push through into the freshwater lochs. Brown trout are resident throughout. The mix of brackish and freshwater venues means the fishing character changes markedly between different parts of the system. Sea pools at the tidal interface fish best around low water when fish concentrate. A unique hybrid fishery that demands an understanding of tides and weather.

  • Loch
  • Peat
Seasons & zones
  • Salmon11 February → 31 October
  • Trout15 March → 6 October

Sea trout: Variable seasonal (2026) — Outer Hebrides sea trout system. Sea-lice pressure from Hebridean salmon farms has affected stocks across the entire west coast. 2025 Scottish sea trout rod catches at record lows. Condition-led; local knowledge essential.

Other water nearby · 5
Booking & contacts