Mayflies
Caddisflies
Stoneflies
- Ecology: Unknown
- Chemical: Unknown
Rules at a glance
- Day tickets
Water temperature for Atlantic Salmon
Ideal15°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 temperature is working for you, but time of day is the limiting factor today.
Likely species
Mayflies
- Ameletus (Nordic swimmer)Most likelyLower confidenceNearest relative#10–12–14–16 · NymphStreamlined cold-water swimmer of upland streams.
- Ephemera vulgata (Nordic lake mayfly)Also possibleLower confidenceNearest relative#8–10–12 · NymphDefining Nordic lake mayfly; burrows soft sediment.
- Large dark oliveAlso possible#14–16 · EmergerDead-drift the emerger — it's sitting in the film.
- Heptagenia dalecarlica (Nordic clinger)Also possibleLower confidenceNearest relative#12–14–16 · NymphNorthern clinger; some cohorts take two years to mature.
Caddisflies
- GrannomMost likelyNearest relative#14–16 · PupaPupa first, then dries as the adults come off.
- Rhyacophila nubila (Nordic free-living caddis)Also possibleLower confidenceNearest relative#10–12–14–16 · NymphPrincipal free-living caddis; larva a year-round searcher.
- Apatania (Arctic case-builder)Also possibleLower confidenceNearest relative#14–16–18 · NymphCold-water case-builder; compressed July-August window.
- Arctopsyche (northern net-spinner)Also possibleLower confidence#8–10–12 · NymphBig net-spinner of large northern rivers and outlets.
Stoneflies
Hatch timeline · todayPeak at 6am
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 2 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
1
Sea trout runRun
1
2
2
2
2
2
1
Late March BrownHatch
2
3
2
Large Brook DunHatch
2
3
2
Large StoneflyHatch
2
3
2
Yellow SallyHatch
2
3
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 · 3
Gallery · 2
Mynningen i Göta älv av Slumpån, som är en vänsterbiflod till Göta älv Terrain map
Water quality (WFD)
Why this score · for Atlantic Salmon
- Temperature10030% 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
Ideal15°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 temperature is working for you, but time of day is the limiting factor today.
Likely species
Mayflies
- Ameletus (Nordic swimmer)Most likelyLower confidenceNearest relative#10–12–14–16 · NymphStreamlined cold-water swimmer of upland streams.
- Ephemera vulgata (Nordic lake mayfly)Also possibleLower confidenceNearest relative#8–10–12 · NymphDefining Nordic lake mayfly; burrows soft sediment.
- Large dark oliveAlso possible#14–16 · EmergerDead-drift the emerger — it's sitting in the film.
- Heptagenia dalecarlica (Nordic clinger)Also possibleLower confidenceNearest relative#12–14–16 · NymphNorthern clinger; some cohorts take two years to mature.
Caddisflies
- GrannomMost likelyNearest relative#14–16 · PupaPupa first, then dries as the adults come off.
- Rhyacophila nubila (Nordic free-living caddis)Also possibleLower confidenceNearest relative#10–12–14–16 · NymphPrincipal free-living caddis; larva a year-round searcher.
- Apatania (Arctic case-builder)Also possibleLower confidenceNearest relative#14–16–18 · NymphCold-water case-builder; compressed July-August window.
- Arctopsyche (northern net-spinner)Also possibleLower confidence#8–10–12 · NymphBig net-spinner of large northern rivers and outlets.
Stoneflies
Hatch timeline · todayPeak at 6am
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 2 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
1
Sea trout runRun
1
2
2
2
2
2
1
Late March BrownHatch
2
3
2
Large Brook DunHatch
2
3
2
Large StoneflyHatch
2
3
2
Yellow SallyHatch
2
3
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 · 3
Gallery · 2
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
- Temperature10030% 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