FishCondishThunder Bay, ON Fishing Report & Live Conditions
Thunder Bay, ON fishing report
Thunder Bay's waters offer a genuine mixed bag through the seasons. Lake trout are the backbone here, holding in Superior's cold, deep water year-round but moving shallower along rocky points and shoals during spring and fall when surface temperatures drop into the mid-40s Fahrenheit. Chinook salmon push into nearshore areas during late summer and early fall, staging near river mouths and current breaks as they seek cooler water before their spawning run. Walleye are less talked about in this context but worth targeting around river systems and the quieter bays feeding into the main lake, especially during spring runoff when they congregate in transitional zones.
For lake trout, downrigging or jigging tube baits and swim baits near rocky structure in 60 to 120 feet of water is consistently productive. Watch your sonar for the thermocline, typically where temperatures drop sharply, and keep presentations just above where fish are suspending. For Chinook, trolling spoons and body baits on long leads behind the boat covers water efficiently when fish are scattered. Walleye respond well to jig-and-minnow rigs worked slowly along soft bottom transitions near current. Surface temperature swings in spring and fall are your best timing indicators across all three species.
Thunder Bay, ON river flow
The closest active USGS gauge to Thunder Bay, ON is PIGEON RIVER AT MIDDLE FALLS NR GRAND PORTAGE MN (site 04010500), about 30.6 miles away. It drains roughly 609 square miles. Flow is the single best predictor of where fish sit in moving water, so it is worth knowing what normal looks like before you read today's number.
In July, this gauge typically runs about 345 cfs.
| Month | Median flow |
|---|---|
| Jan | 122 cfs |
| Feb | 112 cfs |
| Mar | 132 cfs |
| Apr | 822 cfs |
| May | 1,380 cfs |
| Jun | 648 cfs |
| Jul | 345 cfs |
| Aug | 185 cfs |
| Sep | 156 cfs |
| Oct | 187 cfs |
| Nov | 240 cfs |
| Dec | 158 cfs |
Median flow from the USGS daily-statistics record. For the live flow, gage height, water temperature, and today's fishing score, open the Thunder Bay, ON dashboard.
What's biting near Thunder Bay, ON
The species most likely to be feeding Lake Superior: lake trout, Chinook salmon, and walleye. FishCondish grades every hour of the day for Thunder Bay, ON and gives each species its own bite forecast, so you can see which window is worth fishing before you load the truck.
Thunder Bay, ON fishing FAQ
What fish can you catch at Thunder Bay, ON?
The species bite forecast for Thunder Bay, ON covers what's likely feeding there, including lake trout, Chinook salmon, and walleye — and updates with the live conditions.
What's the best time of day to fish Thunder Bay, ON?
Dawn and dusk are usually the most productive windows on Lake Superior, particularly when the barometric pressure is steady or falling. FishCondish grades every hour of the day so you can pick the best one.
When is the best season to fish Thunder Bay, ON?
Spring and fall are typically strongest on Lake Superior as water temperatures sit in the productive range, with summer fishing best early and late in the day. It varies year to year, so check the live conditions before you head out.
How do I know if it's a good day to fish Thunder Bay, ON?
FishCondish combines wind, water level, water temperature, pressure trend, and moon phase into a single 1–10 fishing score for Thunder Bay, ON, updated in real time — a quick go/no-go read before you make the trip.
Fishing tips for Thunder Bay, ON
New to these waters? Start with these beginner-friendly guides: