Freestone · Volcanic · Suðurland / Skaftárhreppur

Fossalár

Multiple cascading waterfalls of the Fossalár river flowing over dark volcanic rock in Iceland, with golden autumn grass and mountains in the background.

A south-coast tributary of the Skaftá near Kirkjubæjarklaustur, originating south of Miklafell at around 600 m elevation and flowing through lava fields from the devastating 1783 Laki eruption.

Good · Sea Trout
Black & Silver Tube · 1-2 inch
Goodlive now
A good day — worth the effort
Low and clear — careful approach country. Small, sparse flies, long leader, careful approach.
75% confidence
What moved it
  • LevelDry recentlyNo gauge reading
  • Water temp13.2°C
  • ClarityClear
Today's fly
BS
Black & Silver Tube1-2 inch
In deep pools and dark water, silhouette and contrast do the work colour cannot. A fly that reads as black against depth is enough. Fish it broadside, hold the swing, let it hang at the dangle — that is when the best fish take.
Conditions on the water
Estimate
Level
Dry recently
No gauge reading
Water temp13.2°C
ClarityClear
Weather10°C
WindNW 25 km/h
Pressure999 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Water temperature for Sea Trout
Ideal
13°C est.ideal 8–15°C
0°14°28°
How to fish it · for Sea Trout
When
From dusk into the first half of the night.
Where
Deeper pools and slower glides · hold water and current seams.
Method
Fish dark patterns on a sink-tip or lightly sunk line, especially near structure.
Kit
10 ft #6/7 rod, floating line with a sink-tip option, 8–10 lb fluoro tippet for the swing.
Why this works
Good — water temperature is right today, though time of day could be better. ⏰ Sea trout become most active after dark, but this stretch closes at 00:32 — before that window fully opens. Fish hard in the last legal hour: overcast skies and warm evenings can bring fish on early even in fading light.
Hatch timeline · todayQuiet day

Hatch predictions

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds with Pro.

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Beyond the hatch · worth watchingambient prey

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Evidence
ModelledModerate confidence

Modelled from regional ecology — no survey or occurrence data for this water yet.

Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
1

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Sea Trout fly box
BS
Black & Silver TubeTop
1-2 inch · Tube
In deep pools and dark water, silhouette and contrast do the work colour cannot. A fly that reads as black against depth is enough. Fish it broadside, hold the swing, let it hang at the dangle — that is when the best fish take.
SF
Snake Fly (Black)
2-4 inch · Streamer
A mobile eel-like profile that undulates through deep pools — effective when sea trout are lying deep and not responding to conventional wets.
Permits & access
Permit required — see local rules.
  • Part of the Battle Hill Lodge system
  • Booking through operator essential.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Geirlandsá
4.0 km
Sea trout · Char
Vatnamót
6.0 km
80
Sea trout
Tungufljót
20 km
Sea trout
Þjórsá
41 km
Salmon · Brown trout
Eystri-Rangá
57 km
73
Salmon · Sea trout · Brown trout
Gallery · 2
  1. Multiple cascading waterfalls of the Fossalár river flowing over dark volcanic rock in Iceland, with golden autumn grass and mountains in the background.
    Slow Fossalar
  2. Terrain map of the venue
    Terrain map
About this water

A south-coast tributary of the Skaftá near Kirkjubæjarklaustur, originating south of Miklafell at around 600 m elevation and flowing through lava fields from the devastating 1783 Laki eruption. Part of the Battle Hill Lodge system alongside Geirlandsá and Vatnamót. Sea trout are the primary catch, with Arctic char also present. The lava-filtered water and unusual volcanic substrate give it a distinctive character among the south-coast sea-trout rivers.

  • River
  • Volcanic
Why this score · for Sea Trout
  • Temperature10028% weight
  • Flow8022% weight
  • Clarity8518% weight
  • Feeding Time4513% weight
  • Pressure857% weight
  • Insect activity5312% weight
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Sea trout check current operator conditions → check current operator conditions
  • Char 1 May → 15 September

    Icelandic Arctic char (bleikja) — fishery permit controls all dates. Common season May–mid-September; exact dates issued per fishery permit. Resident lake char prime late May–mid-July; sea-run char (sjóbleikja) peak July–August. Always obtain the current fishery permit before fishing char in Iceland.

Sea trout: Variable seasonal (2026)

Related guides
Euro Nymphingsubsurface methods
Booking & contacts