Mayflies
- Ecology: High
- Chemical: Unknown
SEPA (Scotland) · UKSC100071
Rules at a glance
- Day tickets
Water temperature for Atlantic Salmon
Warm — slow16°C est.ideal 10–14°C
0°14°28°
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
Good — water clarity is working for you, but time of day is the limiting factor today.
Likely species
Mayflies
- Anglers curse mayfliesMost likelyLower confidence#20–22 · SpinnerGo tiny: 20-22 spent spinner, single fly, long tippet.
- Blue-winged oliveAlso possible#16–18 · DunDuns are up; a sherry spinner fall may follow.
Hatch timeline · todayPeak at 6pm
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds with Pro.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey
Hatch predictions
Top prey shown — see all 2 with Pro.
Start free trial14-day free trial. Cancel anytime.
Through the year
0–3 scale · August 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
Daddy Long LegsHatch
2
3
2
Murrough (Great Red Sedge)Hatch
2
3
2
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Lake OliveHatch
1
2
2
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Atlantic Salmon fly box
Permits & access
Permit required — see local rules.
- Permission required from Grimersta Estate or relevant Lewis estate
- Check FishHebrides for current availability
- No rod licence needed in Scotland.
What's coming
Plan ahead
5-day outlook
Fishing better nearby · 4
Gallery · 2
Loch Langabhat, the largest freshwater loch on the Isle of Lewis, seen from Carabrock Terrain map
Water quality (WFD)
Why this score · for Atlantic Salmon
- Temperature6430% weight
- Flow4525% weight
- Clarity9520% weight
- Feeding Time2015% weight
- Pressure8510% weight
Directions
Seasons & zones
- Salmon 11 February → 31 October
- Trout 15 March → 6 October
- Char varies_by_estate → varies_by_estate
Arctic char (Charr) — Langavat's relict char population is a conservation concern. Seasons and catch rules are set locally by the managing estate to protect the wild stock. If char are encountered as by-catch, practice immediate C&R. Check with the estate (Grimersta) or FishHebrides before any char targeting.
Sea trout: Variable seasonal (2026) — Hebridean sea trout stocks have collapsed under sustained sea-lice pressure from salmon farms on the west coast. Scottish sea trout rod catch was reported at 'lowest on record' in 2025. Langavat system retains a wild sea trout fishery but operates in a severely diminished baseline. Condition-led; catch-and-release expected.
Related guides
Booking & contacts
Loch Langavat (Lewis)
Water temperature for Atlantic Salmon
Warm — slow16°C est.ideal 10–14°C
0°14°28°
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
Good — water clarity is working for you, but time of day is the limiting factor today.
Likely species
Mayflies
- Anglers curse mayfliesMost likelyLower confidence#20–22 · SpinnerGo tiny: 20-22 spent spinner, single fly, long tippet.
- Blue-winged oliveAlso possible#16–18 · DunDuns are up; a sherry spinner fall may follow.
Hatch timeline · todayPeak at 6pm
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds with Pro.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey
Hatch predictions
Top prey shown — see all 2 with Pro.
Start free trial14-day free trial. Cancel anytime.
Through the year
0–3 scale · August 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
Daddy Long LegsHatch
2
3
2
Murrough (Great Red Sedge)Hatch
2
3
2
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Lake OliveHatch
1
2
2
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Atlantic Salmon fly box
Permits & access
Permit required — see local rules.
- Permission required from Grimersta Estate or relevant Lewis estate
- Check FishHebrides for current availability
- No rod licence needed in Scotland.
What's coming
Plan ahead
5-day outlook
Fishing better nearby · 4
Gallery · 2
Loch Langabhat, the largest freshwater loch on the Isle of Lewis, seen from Carabrock Terrain map
Water quality (WFD)
- Ecology: High
- Chemical: Unknown
SEPA (Scotland) · UKSC100071
Why this score · for Atlantic Salmon
- Temperature6430% weight
- Flow4525% weight
- Clarity9520% weight
- Feeding Time2015% weight
- Pressure8510% weight
Directions
Seasons & zones
- Salmon 11 February → 31 October
- Trout 15 March → 6 October
- Char varies_by_estate → varies_by_estate
Arctic char (Charr) — Langavat's relict char population is a conservation concern. Seasons and catch rules are set locally by the managing estate to protect the wild stock. If char are encountered as by-catch, practice immediate C&R. Check with the estate (Grimersta) or FishHebrides before any char targeting.
Sea trout: Variable seasonal (2026) — Hebridean sea trout stocks have collapsed under sustained sea-lice pressure from salmon farms on the west coast. Scottish sea trout rod catch was reported at 'lowest on record' in 2025. Langavat system retains a wild sea trout fishery but operates in a severely diminished baseline. Condition-led; catch-and-release expected.
Related guides
Booking & contacts