Wondering when to book your Grand Traverse Bay fishing trip? Captain Butch breaks down the best months for smallmouth bass, from spring pre-spawn through fall trophies.
Grand Traverse Bay is one of Michigan's premier smallmouth bass fisheries, and the timing of your trip can make the difference between a good day and an unforgettable one. After guiding anglers on this water for more than 20 years, Captain Butch has seen every seasonal pattern the bay has to offer. Here's what to expect month by month so you can pick the perfect window for your charter.
The Quick Answer
If you're short on time, here's the summary. May through June is the best overall window for numbers and aggressive fish during the pre-spawn and spawn. July and August are ideal for families and beginners thanks to warm, calm conditions. Late September through October produces the biggest fish of the year as smallmouth feed aggressively before winter.
April: Early Season Awakening
The season opens April 1, and while Grand Traverse Bay is still shaking off winter, the fishing can surprise you. Water temperatures hover in the mid-40s, and smallmouth are starting to move from their deep winter haunts toward shallower structure.
This is a transitional month. The bite can be slow on cold days, but when a warm front pushes through and bumps the water temperature even a couple of degrees, the bass respond. Finesse techniques like drop shots and ned rigs shine in April because the fish are still lethargic and won't chase fast-moving baits.
"April is for the patient angler," Captain Butch says. "The fish are there. You just have to slow down and let them come to you."
Best trip length: 4-hour trip. The most productive windows are narrow, and a focused half-day outing lets us target the best bite.
May: Pre-Spawn Fire
May is when Grand Traverse Bay comes alive. Water temperatures climb into the mid-50s to low 60s, and smallmouth begin staging on shallow flats, rock piles, and gravel points in preparation for the spawn. This is arguably the most exciting month to fish the bay.
Pre-spawn bronzebacks are aggressive. They're feeding heavily to build energy reserves, and they're concentrated in predictable areas. This combination means more fish, bigger fish, and more explosive strikes. Tube jigs, jerkbaits, and swimbaits all produce well during pre-spawn.
The last two weeks of May are often the best fishing window of the entire year. Smallmouth are at their most aggressive, the weather is warming up, and the summer crowds haven't arrived yet.
Best trip length: 6 or 8-hour trip. The fish are active for extended periods, and the longer you're on the water, the more action you'll see.
June: Spawn and Post-Spawn
June brings the spawn, which typically peaks in the first two weeks when water temperatures hit the low to mid-60s. Male smallmouth move onto beds in shallow, clear water, and sight fishing becomes possible on calm days. This is a visual, exciting style of fishing that appeals to anglers of all experience levels.
By mid to late June, the spawn wraps up and post-spawn patterns emerge. Fish that have been guarding beds move to nearby deeper structure to recover and resume feeding. Post-spawn smallmouth can be slightly less aggressive for a week or two, but Captain Butch knows where they stage and how to trigger bites even during this transitional period.
"June is when I get the biggest smiles from clients," Captain Butch notes. "Sight fishing a 4-pound smallmouth on a bed in crystal-clear water is something people remember for years."
Best trip length: Any trip length works well in June. Even a 4-hour trip delivers plenty of action.
July and August: Summer Patterns
Summer on Grand Traverse Bay means warm water, calm mornings, and smallmouth that have settled into predictable summer locations. Fish move to deeper rock structure, drop-offs, and current-oriented areas where they feed on gobies, crayfish, and minnows.
The morning bite from sunrise to about 10 AM is typically the strongest. Topwater fishing during the first hour of light is a highlight of summer trips. There's nothing quite like a smallmouth exploding on a surface bait in the calm morning water of the bay.
July and August are also the best months for families and beginners. The weather is warm and comfortable, the water is calm most mornings, and the fish are cooperative. Captain Butch adjusts his approach for younger anglers, focusing on techniques that keep the action steady and the fun constant.
Best trip length: 4-hour morning trip for families with younger kids. 6 or 8-hour trip for anglers who want to fish through multiple patterns.
September: The Trophy Window Opens
September is when serious bass anglers should pay attention. Water temperatures begin dropping from their summer peaks, and smallmouth sense the approaching cold. Their metabolism shifts into overdrive as they begin feeding aggressively to prepare for winter.
Fish move from scattered summer positions to more concentrated fall staging areas. Schools of smallmouth group up around key structure, and when you find them, the action can be nonstop. Sizes tend to increase in September too, as the bay's biggest residents become more active and less cautious.
Jerkbaits, crankbaits, and swimbaits worked along rocky ledges and drop-offs are staple techniques for September. The fish want larger meals, and they'll chase.
Best trip length: 6 or 8-hour trip. Fall fishing rewards time on the water, and the all-day bite makes longer trips worthwhile.
October: Last Call, Biggest Fish
October is the final month of the charter season, and it often produces the biggest smallmouth of the year. Water temperatures drop through the 50s, and bass feed with urgency. The foliage around the bay is at peak color, adding a visual backdrop that makes October trips especially memorable.
Fish are deep and grouped tight. Captain Butch targets specific structure where schools stack up, and multiple catches from the same spot are common. The bites are heavy and deliberate. October smallmouth don't play around.
"My personal best fish on this bay have almost all come in October," Captain Butch says. "If you want a chance at a true trophy, this is your month."
The trade-off is weather. October days can be cool, windy, and unpredictable. Layered clothing is essential, and some trips may need to be rescheduled for safety. But when the conditions cooperate, October fishing on Grand Traverse Bay is as good as it gets anywhere in Michigan.
Best trip length: 6 or 8-hour trip. The fish are deep and may require some searching early, but once located, the payoff is worth every minute.
What Else Affects the Bite
Beyond the calendar, a few factors can shift the fishing from day to day:
Water temperature is the single biggest variable. Smallmouth are cold-blooded, and even a 2-3 degree change can turn the bite on or off. Captain Butch monitors water temps constantly and adjusts locations accordingly.
Weather fronts play a major role. The day before a cold front arrives is often outstanding fishing. The day after a front passes can be tough. Blue skies and high pressure tend to push fish deeper and make them less aggressive.
Wind direction matters on Grand Traverse Bay. A southwest wind warms the east shore and pushes baitfish into productive areas. A north wind can cool the shallows quickly and scatter fish. Captain Butch reads the wind forecast before every trip and chooses launch locations that put the conditions in your favor.
Ready to Pick Your Dates?
Every month of the season offers something different on Grand Traverse Bay. Whether you're chasing pre-spawn aggression in May, family fun in July, or trophy potential in October, Captain Butch will put you on fish.
Not sure which window is right for your trip? Call Captain Butch at (231) 883-2200 and he'll help you pick dates based on your goals, your experience level, and what the bay is doing that season. Or head straight to the Trips & Rates page to see packages and book online.