Stoneflies
- Ecology: Good
Water quality details
- Dissolved oxygen: High
- Ammonia (Phys-Chem): High
- pH: High
- Phosphate: High
- Temperature: High
EA (England) · GB108047004040
Rules at a glance
- Fly only
Water temperature for Atlantic Salmon
Ideal12°C est.ideal 10–16°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
Excellent — water temperature is working for you, but water clarity is the limiting factor today.
Likely species
Hatch timeline · tomorrowPeak at 13h
12h(now) — Iron Blue
Stage: On emergersApproach: Emerger or dryActivity: 23%
Peak activity at 13h — Iron Blue (Iron Blue, Weather boost)
Sub-surface · on the nymphunder the surface
Hatch predictions
Supporters see the full sub-surface read.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Supporters see what else is on the menu.
Start free trial14-day free trial. Cancel anytime.
Evidence
Survey-backed · regionalHigh confidence
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Through the year
0–3 scale · October 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
1
March BrownHatch
2
3
2
CapererHatch
2
3
3
2
Heather FlyHatch
2
2
Autumn DunHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Fly box · Atlantic Salmon
Permits & access
Permit required — see local rules.
- EA SW byelaw + mandatory C&R.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
River Plym Terrain map
Water quality (WFD)
Why this score · for Atlantic Salmon
- Temperature10030% weight
- Flow9025% weight
- Clarity4020% weight
- Feeding Time8515% weight
- Pressure8510% weight
Directions
Seasons & zones
- Salmon 1 April → 15 December
- Trout 15 March → 30 September
Sea trout: Variable seasonal (2026)
Related guides
Casting instructors near here
Booking & contacts
Boards & regulators
River Plym
Water temperature for Atlantic Salmon
Ideal12°C est.ideal 10–16°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
Excellent — water temperature is working for you, but water clarity is the limiting factor today.
Likely species
Hatch timeline · tomorrowPeak at 13h
12h(now) — Iron Blue
Stage: On emergersApproach: Emerger or dryActivity: 23%
Peak activity at 13h — Iron Blue (Iron Blue, Weather boost)
Sub-surface · on the nymphunder the surface
Hatch predictions
Supporters see the full sub-surface read.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Supporters see what else is on the menu.
Start free trial14-day free trial. Cancel anytime.
Evidence
Survey-backed · regionalHigh confidence
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Through the year
0–3 scale · October 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
1
March BrownHatch
2
3
2
CapererHatch
2
3
3
2
Heather FlyHatch
2
2
Autumn DunHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Fly box · Atlantic Salmon
Permits & access
Permit required — see local rules.
- EA SW byelaw + mandatory C&R.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
River Plym Terrain map
Water quality (WFD)
- Ecology: Good
Water quality details
- Dissolved oxygen: High
- Ammonia (Phys-Chem): High
- pH: High
- Phosphate: High
- Temperature: High
EA (England) · GB108047004040
Why this score · for Atlantic Salmon
- Temperature10030% weight
- Flow9025% weight
- Clarity4020% weight
- Feeding Time8515% weight
- Pressure8510% weight
Directions
Seasons & zones
- Salmon 1 April → 15 December
- Trout 15 March → 30 September
Sea trout: Variable seasonal (2026)
Related guides
Casting instructors near here
Booking & contacts
Boards & regulators