What Makes Green Bay Different From Other Great Lakes Waters

Green Bay is not the open lake you might picture. It is a 140-mile-long arm of Lake Michigan, shallow in most places, fed by the Fox River from the south and the Menominee River from the west. That geography matters because it creates distinct fishing zones: the Lower Bay near the city of Green Bay holds walleye and smallmouth bass; the Middle Bay around Sturgeon Bay produces perch and some walleye; the Upper Bay and Fox River system hold pike, catfish, and walleye in different seasons. The water is colder and clearer than most inland reservoirs but warmer and more productive than open Lake Michigan.

Depth, current, and structure change dramatically depending where you fish. The Lower Bay has deep holes and shipping channels. The Middle Bay is mostly 20 to 40 feet. The Upper Bay shallows out to 10 feet or less in many spots. That variation means the same technique does not work everywhere, and the fish you target in May looks different from the fish you target in September.

Key Takeaways

  • Green Bay walleye bite best in spring (April–May) and fall (September–October) in deeper water along the shipping channel and near river mouths.
  • Yellow perch are abundant in the Middle Bay year-round and are easiest to catch in winter through the ice or in summer in 25 to 40 feet of water.
  • Smallmouth bass live throughout the bay but concentrate near rocky structure and shallow reefs in summer; they bite best June through September.
  • A Wisconsin fishing license covers Green Bay, and you can fish from shore, boat, or ice depending on the season and your target species.
  • The bay has a commercial shipping channel and strong currents near river mouths, so boat handling and safety change with location and season.

Walleye Fishing in the Lower Bay and River Mouths

Walleye in Green Bay follow a predictable seasonal pattern tied to water temperature and spawning. In spring (late April through May), they move into the Fox River and Menominee River to spawn, and the bite is strongest in the lower sections of both rivers where they stage before heading upstream. Jigs tipped with live minnows or soft plastics work well in 8 to 15 feet of water near current breaks and deeper holes.

After spawning, walleye disperse into the Lower Bay and deeper Middle Bay. Summer fishing is slower because the fish move to deeper, cooler water—often 35 to 50 feet—and they feed primarily at dawn and dusk. Live bait presentations and vertical jigging work better than casting. Fall (September through October) brings another strong bite as water cools and walleye move shallower again, back toward the 15 to 30-foot range. This is when many anglers have their best success with casting and trolling.

Winter walleye fishing happens through the ice in the Upper Bay and shallower sections of the Middle Bay. The bite is most consistent in January and February. Tip-ups with live minnows and small jigging spoons are standard methods.

Yellow Perch: The Bay's Most Reliable Fish

Yellow perch are abundant in Green Bay and less fussy than walleye. They live year-round in the Middle Bay and parts of the Lower Bay, typically in 20 to 45 feet of water over sand and mud bottom. Summer perch fishing means drifting or anchoring in these depths and jigging small spoons, tube jigs, or live minnows. A typical day produces dozens of fish in the 8 to 11-inch range, with occasional larger specimens.

Winter ice fishing for perch is extremely popular and often more productive than summer. Anglers drill holes in 25 to 40 feet of water and jig small spoons or live minnows. The bite is steady through much of the winter, and you can catch enough perch for a meal in a few hours. Check current ice thickness reports before heading out; the bay can have unsafe ice in some areas even when nearby inland lakes are solid.

Spring and fall perch fishing is less predictable because the fish scatter as water temperature changes. Summer and winter are your best bets for consistent action.

Smallmouth Bass and Rocky Structure

Smallmouth bass are present throughout Green Bay but concentrate in areas with rock, gravel, and hard bottom. The Middle Bay has several shallow reefs and rocky points that hold smallmouth year-round. The Lower Bay has deeper structure near the shipping channel. The Upper Bay and Fox River have fewer smallmouth than the lower sections but still hold fish around docks, pilings, and current breaks.

Summer (June through September) is prime smallmouth season. Fish shallow structure in early morning and late evening, and move to deeper water (20 to 35 feet) during midday. Soft plastics, crankbaits, and topwater lures all work. The bite slows considerably in spring and fall, and winter fishing is rare because smallmouth move to deep, inactive water.

Smallmouth in Green Bay average 12 to 16 inches, with occasional fish over 18 inches. They are not as abundant as perch but offer more fight and are worth targeting if you enjoy bass fishing.

Seasons and What to Expect Month by Month

April–May (Spring): Walleye spawn in the Fox and Menominee rivers; this is the best walleye bite of the year. Smallmouth begin moving shallow. Perch are scattered. Water temperature rises from 40 to 55 degrees.

June–August (Summer): Walleye move deep and bite primarily at dawn and dusk. Smallmouth bite well on shallow structure. Perch are abundant in 25 to 45 feet. Water temperature reaches 70 to 75 degrees. This is the busiest season for recreational fishing.

September–October (Fall): Walleye move shallower again and bite well throughout the day. Smallmouth bite improves as water cools. Perch remain productive. Water temperature drops from 65 to 45 degrees. This is often considered the second-best walleye season.

November–March (Winter): Open-water fishing slows dramatically. Ice fishing for perch and walleye is popular in January and February. Smallmouth are inactive. Water temperature drops to 32 to 40 degrees.

Boat Access, Shore Fishing, and Safety Considerations

Green Bay has public boat launches at multiple locations. The City of Green Bay operates launches on the Lower Bay; Sturgeon Bay has launches for the Middle Bay; and several towns along the Upper Bay and Fox River have public access. Most launches have parking and are free or charge a small daily fee. Check with the Wisconsin Department of Natural Resources website for current access points and conditions.

Shore fishing is possible in many places, particularly around the Fox River mouth and near Sturgeon Bay, but much of the bay's shoreline is private or industrial. Public parks and boat launches are your safest bets for legal access.

The bay has a commercial shipping channel, strong currents near river mouths, and can develop rough water quickly. If you are new to the bay, fish with someone who knows it or hire a guide for your first trip. Wear a life jacket, carry a radio, and check weather forecasts before heading out. The bay is large enough to be dangerous if conditions change.

Wisconsin Fishing License and Regulations

You need a Wisconsin fishing license to fish Green Bay. Licenses are available online through the Wisconsin Department of Natural Resources website, at sporting goods stores, and at many bait shops. A daily license costs less than a full-season license if you fish only occasionally.

Walleye, perch, and smallmouth all have size and bag limits that change year to year. Check the current Wisconsin fishing regulations before you go. Regulations are posted on the DNR website and in the printed guide available at license vendors. Limits exist to keep the fishery healthy, and they vary by species and sometimes by location within the bay.

The bay is open to fishing year-round, but ice fishing requires different safety precautions and is only practical when ice is thick enough—typically January through February.

Frequently Asked Questions

What is the best time of year to fish Green Bay for walleye?

Spring (late April through May) and fall (September through October) are best. Spring walleye congregate in the Fox and Menominee rivers to spawn, making them easy to locate. Fall walleye move shallower as water cools and bite throughout the day. Summer walleye are deep and inactive during daylight.

Can I catch perch year-round in Green Bay?

Perch are present year-round, but summer and winter are most productive. Summer perch fishing in 25 to 45 feet of water is consistent. Winter ice fishing is often even better and draws many anglers. Spring and fall perch are scattered and harder to find.

Do I need a boat to fish Green Bay, or can I fish from shore?

You can fish from shore in some locations, particularly near the Fox River mouth and around Sturgeon Bay, but a boat gives you access to deeper water and more productive structure. Many anglers use both methods depending on what they are targeting and where they can legally access the water.

How deep is Green Bay, and does depth change throughout the bay?

The Lower Bay near Green Bay city has deep holes and shipping channels reaching 50+ feet. The Middle Bay around Sturgeon Bay averages 20 to 40 feet. The Upper Bay shallows to 10 feet or less in many areas. Depth affects which fish live where and what techniques work best.

Is it safe to fish Green Bay in winter?

Ice fishing is safe when ice is thick enough, typically January and February. Check current ice thickness reports before going out; the bay can have unsafe ice in some areas even when nearby lakes are solid. Wear a life jacket, carry a radio, and never fish alone on unfamiliar ice.