Mayflies
Stoneflies
Caddisflies
Aquatic beetles
Gammarids
- Ecology: Unknown
- Chemical: Unknown
Rules at a glance
- Day tickets
Water temperature for Atlantic Salmon
Cool — slow9°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
Good — water clarity is working for you, but time of day is the limiting factor today.
Likely species
Mayflies
- Iron BlueMost likelyNearest relative#16–18 · DunCold, grey day — the dun sits long. Good dry-fly water.
- Late March BrownAlso possibleLower confidence#12–14 · DunLate-season upland riffle dun, dusk emergence.
- Ameletus (Nordic swimmer)Also possibleLower confidenceNearest relative#10–12–14–16 · NymphStreamlined cold-water swimmer of upland streams.
- Turkey BrownAlso possibleLower confidence#14–16 · DunSmall spring dun on slower glides and margins.
Caddisflies
- Green SedgeMost likelyLower confidenceNearest relative#10–12–14–16 · NymphFree-living green caddis larva; fast stony riffles.
- Large sedgesAlso possibleNearest relative#8–10 · AdultBig waked sedge in the last light and after dark.
- Saddle-case CaddisAlso possibleLower confidenceNearest relative#16–18 · AdultTiny blackish caddis; fast riffles, early summer.
Blackflies
Aquatic beetles
- Diving beetlesMost likelyLower confidence#8–10–12 · AdultTwitch a beetle pattern along weedy edges at dusk.
Molluscs
- Pond snailsMost likelyLower confidence#10–12–14 · AdultDead-drift or twitch a snail pattern near weed beds.
Oligochaetes
- Aquatic wormsMost likelyLower confidence#12–14–16 · AdultDead-drift a worm pattern deep - a year-round staple.
Hatch timeline · todayPeak at 11h
12h(now) — Autumn Needle Fly
Stage: Creeping nymphsApproach: Heavy nymphActivity: 95%
Also:Iron Blue83%Black Midge70%
Peak emergence window6 food groups active
Peak activity at 11h — Autumn Needle Fly (Autumn Needle Fly, Peak emergence window)
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 2 guilds as a supporter.
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
1
Sea trout runRun
1
2
2
2
2
2
1
Yellow SallyHatch
2
3
3
2
Nordic SpringflyHatch
2
3
3
2
Late March BrownHatch
2
3
2
Large Brook DunHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Beats · 2 · 1 reaches
Göta älvs Lilla Edet–Trollhättan FVO's water is not one uniform stretch — it's the wide main-stem river from north of the Lilla Edet power station (marked by buoys) up to and including the suspension bridge in Trollhättan, plus the distinct tributary Slumpån running up to Stångeforsen. One ticket covers both. Official club rules confirmed directly from iFiske (2026-08-21): 45cm minimum for salmon/sea trout/zander, closed 15 Oct–31 Mar, max 2 rods/person, max 2 salmon/day, eel protected year-round, under-15s free. The 2026 EU Baltic salmon rule (wild fish must be released, only fin-clipped hatchery salmon kept) applies on top of these local rules.
Göta älvs Lilla Edet–Trollhättan FVO · 2 beatsDay rods
Göta älv main stem — Lilla Edet to Trollhättan, Slumpån — tributary up to Stångforsen
The 2 beats
Göta älv main stem — Lilla Edet to TrollhättanDay tickets
Göta älvs Lilla Edet–Trollhättan FVO
The broad main-stem reach of Göta älv from north of the Lilla Edet power station up to the suspension bridge in Trollhättan — big-river water on one of Sweden's most significant salmon systems, alongside a genuine mixed coarse fishery (pike, perch, zander, burbot, eel).
Official club rules (iFiske, confirmed 2026-08-21): 45cm minimum (salmon/sea trout/zander), closed season 15 Oct–31 Mar, max 2 rods/person, max 2 salmon/day, eel protected year-round. Only adipose-fin-clipped salmon may be kept per the 2026 EU Baltic rule — wild salmon must be released regardless of local size/season rules.
Slumpån — tributary up to StångforsenDay tickets
Göta älvs Lilla Edet–Trollhättan FVO
The named tributary reach up to Stångforsen — a smaller-scale, more intimate alternative to the Göta älv main stem, covered by the same FVO permit.
Official club rules (iFiske, confirmed 2026-08-21): 45cm minimum (salmon/sea trout/zander), closed season 15 Oct–31 Mar, max 2 rods/person, max 2 salmon/day, eel protected year-round. Only adipose-fin-clipped salmon may be kept per the 2026 EU Baltic rule — wild salmon must be released regardless of local size/season rules.
Permits & access
Permit required — see local rules.
- Day/week/season ticket via iFiske
- Official club rules (confirmed 2026-08-21): 45cm minimum size for salmon, sea trout and zander; closed season 15 Oct–31 Mar; max 2 rods/person; max 2 salmon/day; eel fully protected year-round; under-15s fish free
- On top of this, the 2026 EU Baltic salmon rule requires releasing any wild (unclipped) salmon — only adipose-fin-clipped hatchery fish may be kept.
What's coming
Plan ahead
5-day outlook
Other water nearby · 4
Gallery · 3
Mynningen i Göta älv av Slumpån, som är en vänsterbiflod till Göta älv 
Terrain map
Water quality (WFD)
Why this score · for Atlantic Salmon
- Temperature7430% weight
- Flow6025% weight
- Clarity9520% weight
- Feeding Time1015% weight
- Pressure8510% weight
Directions
Seasons & zones
- Salmon 1 April → 14 October
- Sea trout 1 April → 14 October
Related guides
Booking & contacts
Slumpån (Göta älvs Lilla Edet–Trollhättan)
Water temperature for Atlantic Salmon
Cool — slow9°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
Good — water clarity is working for you, but time of day is the limiting factor today.
Likely species
Mayflies
- Iron BlueMost likelyNearest relative#16–18 · DunCold, grey day — the dun sits long. Good dry-fly water.
- Late March BrownAlso possibleLower confidence#12–14 · DunLate-season upland riffle dun, dusk emergence.
- Ameletus (Nordic swimmer)Also possibleLower confidenceNearest relative#10–12–14–16 · NymphStreamlined cold-water swimmer of upland streams.
- Turkey BrownAlso possibleLower confidence#14–16 · DunSmall spring dun on slower glides and margins.
Caddisflies
- Green SedgeMost likelyLower confidenceNearest relative#10–12–14–16 · NymphFree-living green caddis larva; fast stony riffles.
- Large sedgesAlso possibleNearest relative#8–10 · AdultBig waked sedge in the last light and after dark.
- Saddle-case CaddisAlso possibleLower confidenceNearest relative#16–18 · AdultTiny blackish caddis; fast riffles, early summer.
Blackflies
Aquatic beetles
- Diving beetlesMost likelyLower confidence#8–10–12 · AdultTwitch a beetle pattern along weedy edges at dusk.
Molluscs
- Pond snailsMost likelyLower confidence#10–12–14 · AdultDead-drift or twitch a snail pattern near weed beds.
Oligochaetes
- Aquatic wormsMost likelyLower confidence#12–14–16 · AdultDead-drift a worm pattern deep - a year-round staple.
Hatch timeline · todayPeak at 11h
12h(now) — Autumn Needle Fly
Stage: Creeping nymphsApproach: Heavy nymphActivity: 95%
Also:Iron Blue83%Black Midge70%
Peak emergence window6 food groups active
Peak activity at 11h — Autumn Needle Fly (Autumn Needle Fly, Peak emergence window)
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 2 guilds as a supporter.
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
1
Sea trout runRun
1
2
2
2
2
2
1
Yellow SallyHatch
2
3
3
2
Nordic SpringflyHatch
2
3
3
2
Late March BrownHatch
2
3
2
Large Brook DunHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Beats · 2 · 1 reaches
Göta älvs Lilla Edet–Trollhättan FVO's water is not one uniform stretch — it's the wide main-stem river from north of the Lilla Edet power station (marked by buoys) up to and including the suspension bridge in Trollhättan, plus the distinct tributary Slumpån running up to Stångeforsen. One ticket covers both. Official club rules confirmed directly from iFiske (2026-08-21): 45cm minimum for salmon/sea trout/zander, closed 15 Oct–31 Mar, max 2 rods/person, max 2 salmon/day, eel protected year-round, under-15s free. The 2026 EU Baltic salmon rule (wild fish must be released, only fin-clipped hatchery salmon kept) applies on top of these local rules.
Göta älvs Lilla Edet–Trollhättan FVO · 2 beatsDay rods
Göta älv main stem — Lilla Edet to Trollhättan, Slumpån — tributary up to Stångforsen
The 2 beats
Göta älv main stem — Lilla Edet to TrollhättanDay tickets
Göta älvs Lilla Edet–Trollhättan FVO
The broad main-stem reach of Göta älv from north of the Lilla Edet power station up to the suspension bridge in Trollhättan — big-river water on one of Sweden's most significant salmon systems, alongside a genuine mixed coarse fishery (pike, perch, zander, burbot, eel).
Official club rules (iFiske, confirmed 2026-08-21): 45cm minimum (salmon/sea trout/zander), closed season 15 Oct–31 Mar, max 2 rods/person, max 2 salmon/day, eel protected year-round. Only adipose-fin-clipped salmon may be kept per the 2026 EU Baltic rule — wild salmon must be released regardless of local size/season rules.
Slumpån — tributary up to StångforsenDay tickets
Göta älvs Lilla Edet–Trollhättan FVO
The named tributary reach up to Stångforsen — a smaller-scale, more intimate alternative to the Göta älv main stem, covered by the same FVO permit.
Official club rules (iFiske, confirmed 2026-08-21): 45cm minimum (salmon/sea trout/zander), closed season 15 Oct–31 Mar, max 2 rods/person, max 2 salmon/day, eel protected year-round. Only adipose-fin-clipped salmon may be kept per the 2026 EU Baltic rule — wild salmon must be released regardless of local size/season rules.
Permits & access
Permit required — see local rules.
- Day/week/season ticket via iFiske
- Official club rules (confirmed 2026-08-21): 45cm minimum size for salmon, sea trout and zander; closed season 15 Oct–31 Mar; max 2 rods/person; max 2 salmon/day; eel fully protected year-round; under-15s fish free
- On top of this, the 2026 EU Baltic salmon rule requires releasing any wild (unclipped) salmon — only adipose-fin-clipped hatchery fish may be kept.
What's coming
Plan ahead
5-day outlook
Other water nearby · 4
Gallery · 3
Mynningen i Göta älv av Slumpån, som är en vänsterbiflod till Göta älv Terrain map
Water quality (WFD)
- Ecology: Unknown
- Chemical: Unknown
Why this score · for Atlantic Salmon
- Temperature7430% weight
- Flow6025% weight
- Clarity9520% weight
- Feeding Time1015% weight
- Pressure8510% weight
Directions
Seasons & zones
- Salmon 1 April → 14 October
- Sea trout 1 April → 14 October
Related guides
Booking & contacts