Great Slave Lake NWT fishing forecast
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.
Today’s verdict
Ranks #194 of 437 spots FishRadar scored worldwide today
Trending up — 12 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.
Current conditions
| Sea surface temp | 14.0 °C |
|---|---|
| Wind | 19 km/h from N |
| Wave height | 0.2 m at 2 s |
| Pressure | 1014 hPa |
| Cloud cover | 0% |
| Chlorophyll | 5.72 mg/m³ |
| Salinity | 0.0 PSU |
| UV index | 0 |
| Wind sea | 0.0 m at 1 s |
| Ground swell | 0.2 m at 2 s from NNW |
The water here is 4.3 °C warmer than the September average of 9.6 °C. Warmer-than-normal water pushes cool-water species deeper and brings warm-water species in earlier than the calendar suggests. The water is mixed to about 54.0 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 70 out of 100 (Good). Water temperature is 14.0 °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 +15.0
- swell energy stirring the water column
- Wind +7.5
- surface chop, oxygen and bait drift
- 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
What’s biting now
The model expects today: arctic-grayling, lake-trout, northern-pike, walleye, arctic-char, brook-trout, kokanee-salmon, tiger-trout
Bite windows
Best months for Great Slave Lake NWT:
Score history at this spot
30 days tracked at this exact location
Best recent day: 2026-08-14, 81/100
12 day(s) at 70+ in the tracked period
+16 points vs the same day last week
About this spot
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
-
Salvelinus namaycush
-
Thymallus arcticus
-
Esox lucius
-
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
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.
Check Great Slave Lake NWT before you go
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Nearby spots
Explore 10 more fishing spots within 1419 km of Great Slave Lake NWT.
-
Lake Athabasca
Great Bear Lake NWT
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Cambridge Bay Nunavut Canada
Prince Rupert Skeena
Yukon River Dawson
Thompson River BC
Haida Gwaii
Haida Gwaii BC
Haida Gwaii British Columbia
Frequently asked questions
What fish can you catch at Great Slave Lake NWT?
Anglers at Great Slave Lake NWT target Lake Trout, Arctic Grayling, Northern Pike and Walleye.
When is the best time to fish Great Slave Lake NWT?
The most productive months at Great Slave Lake NWT are typically June, July, August, September.
What is the fishing forecast for Great Slave Lake NWT right now?
Great Slave Lake NWT currently scores 70 out of 100, based on live ocean and weather conditions — see the full breakdown on this page.
Can you fish Great Slave Lake NWT from shore?
Yes — Great Slave Lake NWT is fishable from shore (beach).
Is the thermocline set up at Great Slave Lake NWT right now?
Not strongly right now — the water column is fairly mixed, so fish are less depth-locked.
Fishing guides for this spot
- How to Catch TroutHow to Catch Arctic Grayling: The Sail-Finned Jewel of the NorthBest Time of Day to Fish
Forecasts, not guarantees — check local rules before you fish.