Mayflies
- Ecology: Good
- Chemical: Unknown
Rules at a glance
- Free fishing
- Fly only
Water temperature for Atlantic Salmon
Warm — slow21°C est.ideal 10–14°C
0°14°28°
How to fish it · for Atlantic Salmon
When
Morning into early afternoon.
Where
Pool tails, steadier runs, and any water with pace.
Method
Fish a sensible line-and-fly combination for the height and pace of water.
Kit
13 ft #8/9 double-hander in spate, 10 ft #8 single in low water. Floating line plus a fast-sink tip. 12–15 lb fluoro tippet.
Why this works
Water at 20.6°C. This is the line where catch-and-release kills atlantic salmon. Do not fish for them today.
Likely species
Mayflies
- Blue-winged oliveMost likely#16–18 · DunDuns are up; a sherry spinner fall may follow.
- Anglers curse mayfliesAlso possibleLower confidence#20–22 · SpinnerGo tiny: 20-22 spent spinner, single fly, long tippet.
Hatch timeline · todayPeak at 6am
Hatch predictions
Today's headline hatch shown — see all 4 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
See the full sub-surface read 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
1
Trout seasonSeason
1
2
2
2
2
2
2
1
Daddy Long LegsHatch
2
3
2
March BrownHatch
2
3
2
GrannomHatch
2
2
Large StoneflyHatch
2
3
2
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.
- State rod licence required (IFI)
- Sheen Falls Lodge holds exclusive fishing rights — book via the lodge
- For 2026 the River Sheen is open with a harvest surplus under the Wild Salmon & Sea Trout Tagging Scheme (S.I
- 129/2026) — harvest to 31 August under tag and the bag limit, catch-and-release from 1 September.
What's coming
Plan ahead
5-day outlook
Water here around 21°C. Nothing cooler within range — carry a thermometer.
Water quality (WFD)
The full read · show the working · for Atlantic Salmon · confidence 90%
How the river scores — hydrology factors
Water heightMedium Ideal0.0
Recent riseNone0.0
Falling after liftNot Applicable0.0
Water temperatureCool To Moderate0.0
Time in seasonOpening Period0.0
ClarityClearing0.0
Hydrology base0.0
Legal gate: Unknown Check Local Rules
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Launeproxy
Directions
Seasons & zones
- Salmon 15 March → 30 September
- Trout 15 February → 30 September
Related guides
Casting instructors near here
Booking & contacts
River Sheen
Water temperature for Atlantic Salmon
Warm — slow21°C est.ideal 10–14°C
0°14°28°
How to fish it · for Atlantic Salmon
When
Morning into early afternoon.
Where
Pool tails, steadier runs, and any water with pace.
Method
Fish a sensible line-and-fly combination for the height and pace of water.
Kit
13 ft #8/9 double-hander in spate, 10 ft #8 single in low water. Floating line plus a fast-sink tip. 12–15 lb fluoro tippet.
Why this works
Water at 20.6°C. This is the line where catch-and-release kills atlantic salmon. Do not fish for them today.
Likely species
Mayflies
- Blue-winged oliveMost likely#16–18 · DunDuns are up; a sherry spinner fall may follow.
- Anglers curse mayfliesAlso possibleLower confidence#20–22 · SpinnerGo tiny: 20-22 spent spinner, single fly, long tippet.
Hatch timeline · todayPeak at 6am
Hatch predictions
Today's headline hatch shown — see all 4 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
See the full sub-surface read 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
1
Trout seasonSeason
1
2
2
2
2
2
2
1
Daddy Long LegsHatch
2
3
2
March BrownHatch
2
3
2
GrannomHatch
2
2
Large StoneflyHatch
2
3
2
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.
- State rod licence required (IFI)
- Sheen Falls Lodge holds exclusive fishing rights — book via the lodge
- For 2026 the River Sheen is open with a harvest surplus under the Wild Salmon & Sea Trout Tagging Scheme (S.I
- 129/2026) — harvest to 31 August under tag and the bag limit, catch-and-release from 1 September.
What's coming
Plan ahead
5-day outlook
Water here around 21°C. Nothing cooler within range — carry a thermometer.
Water quality (WFD)
- Ecology: Good
- Chemical: Unknown
The full read · show the working · for Atlantic Salmon · confidence 90%
How the river scores — hydrology factors
Water heightMedium Ideal0.0
Recent riseNone0.0
Falling after liftNot Applicable0.0
Water temperatureCool To Moderate0.0
Time in seasonOpening Period0.0
ClarityClearing0.0
Hydrology base0.0
Legal gate: Unknown Check Local Rules
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Launeproxy
Directions
Seasons & zones
- Salmon 15 March → 30 September
- Trout 15 February → 30 September
Related guides
Casting instructors near here
Booking & contacts