Water temperature for Atlantic Salmon
Welfare risk22°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 22.2°C. This is the line where catch-and-release kills atlantic salmon. Do not fish for them today.
Hatch timeline · todayPeak at 6am
Hatch predictions
Today's headline hatch shown — see all 2 active hatches hour by hour 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.
Evidence
Survey-backed · regionalHigh confidence
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
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.
Beats · 3 · 1 reaches
Osprey Fly Fishers cover the lower, grayling-holding river toward Pontypridd; Upper Rhondda AA covers the source end near Llyn Fawr. A long-standing middle stretch (formerly Glyncornel AA) is currently free to fish on just a rod licence after that club folded.
Rhondda day-ticket water · 3 beatsDay rods
Osprey Fly Fishers' Association, Upper Rhondda Angling Association, Former Glyncornel AA water — now free fishing
The 3 beats
Osprey Fly Fishers' AssociationDay tickets
Osprey Fly Fishers' Association
Lower river, from the Taff junction up to Trehafod footbridge — the stretch closest to Pontypridd, and where grayling are genuinely present (the Grayling Society's own guide names Osprey's Taff/Rhondda/Cynon water specifically). Occasional late-season salmon.
Day ticket £10; full river permit £65 (covers Taff, Rhondda, Cynon, Usk, and Brecon Beacons reservoirs). Grayling season 1 Oct–28 Feb on this club's Taff/Rhondda/Cynon water.
Upper Rhondda Angling AssociationDay tickets
Upper Rhondda Angling Association
Upper river near the source, adjoining Llyn Fawr reservoir — fished by this club since 1957.
Day/season ticket, contact club for current details.
Former Glyncornel AA water — now free fishingPublic
No current controller — free to rod-licence holders
Roughly 12-15 miles from Bwlch Mountain above Cwmparc down through Treorchy to Trehafod — historically Glyncornel Angling Association's water, described as strong trout fishing with 4lb+ fish not uncommon. Glyncornel folded around 2024; the council hasn't re-leased the fishing rights, so this stretch is currently free to fish with just a rod licence rather than gated behind a club permit. Worth a phone check (01443 432289) before relying on this, since the status could change.
Free — NRW/EA rod licence only, no separate permit as of 2026. Trout season 3 March-30 September.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 1
Probably above the Atlantic Salmon safety line — these are likely cooler, but carry a thermometer.
Gallery · 2
Downstream along the Rhondda River, Treorchy Terrain map
Why this score · for Atlantic Salmon
- Temperature030% weight
- Flow6025% weight
- Clarity9520% weight
- Feeding Time9015% weight
- Pressure8510% weight
Directions
Related guides
Casting instructors near here
Booking & contacts
Rhondda
Water temperature for Atlantic Salmon
Welfare risk22°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 22.2°C. This is the line where catch-and-release kills atlantic salmon. Do not fish for them today.
Hatch timeline · todayPeak at 6am
Hatch predictions
Today's headline hatch shown — see all 2 active hatches hour by hour 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.
Evidence
Survey-backed · regionalHigh confidence
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
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.
Beats · 3 · 1 reaches
Osprey Fly Fishers cover the lower, grayling-holding river toward Pontypridd; Upper Rhondda AA covers the source end near Llyn Fawr. A long-standing middle stretch (formerly Glyncornel AA) is currently free to fish on just a rod licence after that club folded.
Rhondda day-ticket water · 3 beatsDay rods
Osprey Fly Fishers' Association, Upper Rhondda Angling Association, Former Glyncornel AA water — now free fishing
The 3 beats
Osprey Fly Fishers' AssociationDay tickets
Osprey Fly Fishers' Association
Lower river, from the Taff junction up to Trehafod footbridge — the stretch closest to Pontypridd, and where grayling are genuinely present (the Grayling Society's own guide names Osprey's Taff/Rhondda/Cynon water specifically). Occasional late-season salmon.
Day ticket £10; full river permit £65 (covers Taff, Rhondda, Cynon, Usk, and Brecon Beacons reservoirs). Grayling season 1 Oct–28 Feb on this club's Taff/Rhondda/Cynon water.
Upper Rhondda Angling AssociationDay tickets
Upper Rhondda Angling Association
Upper river near the source, adjoining Llyn Fawr reservoir — fished by this club since 1957.
Day/season ticket, contact club for current details.
Former Glyncornel AA water — now free fishingPublic
No current controller — free to rod-licence holders
Roughly 12-15 miles from Bwlch Mountain above Cwmparc down through Treorchy to Trehafod — historically Glyncornel Angling Association's water, described as strong trout fishing with 4lb+ fish not uncommon. Glyncornel folded around 2024; the council hasn't re-leased the fishing rights, so this stretch is currently free to fish with just a rod licence rather than gated behind a club permit. Worth a phone check (01443 432289) before relying on this, since the status could change.
Free — NRW/EA rod licence only, no separate permit as of 2026. Trout season 3 March-30 September.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 1
Probably above the Atlantic Salmon safety line — these are likely cooler, but carry a thermometer.
Gallery · 2
Downstream along the Rhondda River, Treorchy Terrain map
Why this score · for Atlantic Salmon
- Temperature030% weight
- Flow6025% weight
- Clarity9520% weight
- Feeding Time9015% weight
- Pressure8510% weight
Directions
Related guides
Casting instructors near here
Booking & contacts