Northwest Territories · Canada

Great Slave Lake NWT fishing forecast

Name: Great Slave Lake NWT
Address: Northwest Territories, CA

54 Good of 100

Great Slave Lake NWT is a freshwater fishing spot in Northwest Territories, Canada. Anglers here target Lake Trout, Arctic Grayling, Northern Pike, Walleye. The most productive months are typically June, July, August, September.

Quick answer

Best monthsJune, July, August, September

Top speciesLake Trout, Arctic Grayling, Northern Pike

Score now54/100

Local rulesCanada

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Today’s verdict

Ranks #374 of 409 spots FishRadar scored worldwide today

Trending up — 6 points above this spot’s 7-day average

Score confidence ±7 points, from 7 live signals

The statistical model disagrees with the physics model here today — treat this score with extra caution.

Helping the score most

Water temperature+15.0Waves+9.0Barometric pressure+4.4

Pressure trend

Pressure data unavailable

Best window today

20:00 · Light wind (0 km/h) and calm seas

Next solunar peak

major 05:09

Current conditions

Sea surface temp	6.9 °C
Wind	26 km/h from NNE, gusting 32 km/h
Wave height	0.5 m at 3 s
Pressure	1022 hPa
Cloud cover	16%
Chlorophyll	5.28 mg/m³
Salinity	0.0 PSU
UV index	0
Wind sea	0.5 m at 3 s
Ground swell	0.2 m at 3 s from NNW

The water here is 1.3 °C cooler than the October average of 8.2 °C. Cooler-than-normal water slows the bite for warm-water species and holds cool-water species shallower for longer. The water is mixed to about 65.0 m, so surface temperature carries well down the water column.

Updated 1 h ago.

What the score means at Great Slave Lake NWT

Great Slave Lake NWT currently scores 54 out of 100 (Good). Water temperature is 6.9 °C. 7 forecast signals are active in this score.

Water temperature +15.0: how close the water is to this species mix’s comfort band
Waves +9.0: swell energy stirring the water column
Barometric pressure +4.4: falling pressure often triggers feeding
Gust factor +4.0: gustiness versus steady wind
Pre-storm bite +2.4: the classic feed before heavy weather
Moon phase +2.3: lunar feeding rhythm

What’s biting now

The model expects today: lake-trout, northern-pike, walleye, brook-trout, kokanee-salmon, tiger-trout, brown-trout, yellow-perch

Bite windows

Moon

Waxing Gibbous · 90% lit

Solunar day rating

50 / 100

Best months for Great Slave Lake NWT:

Score history at this spot

30 days tracked at this exact location

Best recent day: 2026-10-20, 77/100

5 day(s) at 70+ in the tracked period

+8 points vs the same day last week

About this spot

Water type

Lake · Freshwater

Lakes have no tide, so target structure, drop-offs, and seasonal thermoclines where fish concentrate by depth and temperature.

Access & shore

Fishable from shore · beach

What you can catch

Lake Trout

Salvelinus namaycush
Arctic Grayling

Thymallus arcticus
Northern Pike

Esox lucius
Walleye

Sander vitreus

Best months by species at Great Slave Lake NWT

Lake TroutSalvelinus namaycush
Arctic GraylingThymallus arcticus
Northern PikeEsox lucius
WalleyeSander vitreus

Typical months; local seasons and closures apply.

Local regulations

Fisheries and Oceans Canada (DFO) / Pêches et Océans Canada

Canada

Licensing:

saltwater-recreational — residents A recreational (tidal/marine) fishing licence issued by Fisheries and Oceans Canada (DFO) is required. Licences are region-specific (e.g. the BC Tidal Waters Sport Fishing Licence on the Pacific coast). Obtain them through the National Recreational Licensing System., non-residents Non-residents need the same DFO recreational tidal/marine licence for the relevant region.
freshwater-recreational — residents Inland/freshwater angling licences are issued by each province or territory, not by DFO. Rules, seasons and fees vary by province., non-residents Non-residents need the relevant provincial/territorial freshwater angling licence.

Some rules may have changed since our last verification — always confirm with the authority before you fish.

FishRadar regulations are summaries for informational purposes only. Canadian recreational fishing rules vary by region, province/territory and species, and are set by Fisheries and Oceans Canada (marine) and provincial authorities (inland). Always verify current rules with DFO at dfo-mpo.gc.ca and your provincial authority before fishing.