Freestone · Limestone · Northwest Territories

South Nahanni River

South Nahanni River — Looking across the South Nahanni River from the Virginia Falls dock
Prime · Arctic Grayling
Parachute Adams · 14–18
Primelive now
About as good as it gets
River high but settled. Coloured water — fish bigger and deeper, confident takes down the seams.
75% confidence
What moved it
  • Level3.91 mDropping in the last 6h
  • Water temp9.0°C
  • ClarityClear
Today's fly
Parachute Adams
Parachute Adams14–18
Cast to rising fish and let it drift drag-free.
Conditions on the water
Live gauge
Level
Falling
3.91 m
Dropping in the last 6h
Water temp9.0°C
ClarityClear
Weather7°C
WindNE 1 km/h
Pressure1026 hPa
Rain · recent3.7 mm
Rain · ahead5.7 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Arctic Grayling
Ideal
9°C est.ideal 4–14°C
0°14°28°
How to fish it · for Arctic Grayling
When
Midday window — grayling feed best from late morning into early afternoon.
Where
Work runs and glides — grayling shoal in the bottom third of the water column.
Method
Tight-line nymph the bottom third with weighted patterns.
Kit
10 ft #3 rod, floating line, long leader to 4 lb fluoro for nymphs.
Why this works
Excellent — water temperature is right today, though insect activity could be better.
Hatch timeline · todayQuiet day

Hatch predictions

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Sub-surface · on the nymphunder the surface

Hatch predictions

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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 · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
1
Western Green DrakeHatch
2
2
Flav (Small Western Green Drake)Hatch
2
3
2
Mahogany DunHatch
2
2
American March BrownHatch
2
3
2

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

Ranked for today
Arctic Grayling fly box
BH
Bead-head nymph
14–16 · Nymph
Search the runs and pockets, dead-drift near the bottom.
SS
Small streamer (char)
8–10 · Streamer
Strip it for fish chasing fry or in coloured water.
AL
Articulated leech (lakers)
12–16 · Fly
A dependable searching pattern for these waters.
Permits & access
Permit required — see local rules.
  • National Park fishing permit required; grayling/char C&R
  • Verify current Parks Canada / NWT rules.
What's coming
Plan ahead
5-day outlook
Gallery · 2
  1. South Nahanni River — Looking across the South Nahanni River from the Virginia Falls dock
    Looking across the South Nahanni River from the Virginia Falls dock
  2. Terrain map of the venue
    Terrain map
Conservation note

Arctic grayling, bull trout / Dolly Varden (char) and lake trout — catch-and-release. Within Nahanni National Park Reserve; a Parks Canada fishing permit and Indigenous co-management rules apply. Clean-Drain-Dry.

The full read · show the working · for Arctic Grayling · confidence 75%
How the 88 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow95 × 22%20.9
Clarity85 × 18%15.3
Feeding Time95 × 13%12.4
Pressure80 × 7%5.6
Insect activity50 × 12%6.0
Conditions total= 88
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 July → 15 September
Related guides
Euro Nymphingsubsurface methods
Booking & contacts