What You'll Find on the St. George River

The St. George River flows through Knox County in midcoast Maine, running roughly 45 miles from its headwaters near Liberty south to the Atlantic at St. George. The river holds smallmouth bass, largemouth bass, white perch, and chain pickerel in its freshwater sections, with striped bass and other saltwater species entering the tidal portions near the mouth. The lower river, particularly around the towns of St. George and Thomaston, is tidal and brackish — a mix that attracts both freshwater and saltwater fish depending on the season and tide.

The upper sections near Liberty and Union are quieter, less pressured, and better for bass and pickerel. The middle sections around Waldoboro offer a mix of habitat: marshes, deeper pools, and current breaks that hold fish year-round. Access varies significantly by location, and some of the best water is on private land or requires permission.

Key Takeaways

  • Smallmouth bass are the primary target on the St. George, with spring and fall offering the most consistent fishing in the upper and middle river.
  • The lower river near St. George and Thomaston is tidal and holds striped bass and white perch, especially during spring and fall migrations.
  • Public access is limited; the best entry points are boat launches at Thomaston and Waldoboro, plus roadside parking at a few bridge crossings.
  • Maine fishing regulations require a license for anyone 16 and older, and the St. George has specific rules on bass size and daily catch limits that change by section.
  • Water levels and current vary with rainfall and tide, so checking conditions before you go prevents wasted trips to shallow or unfishable sections.

Seasons and What to Expect

Spring (April through May) brings the most active fishing on the St. George. Smallmouth bass move shallow after spawning, white perch run upriver to spawn, and the water is cool enough to keep fish feeding throughout the day. The lower tidal sections see the heaviest white perch activity in late April and early May. Water temperatures in spring range from the low 50s to mid-60s Fahrenheit.

Summer (June through August) slows the bite considerably. Bass move to deeper pools and shade, and midday heat pushes most fish into low-light periods. Early morning and evening fishing, or targeting the deeper holes near Waldoboro, produces better results than midday casting. White perch largely disappear from the freshwater sections as they return to salt water.

Fall (September through October) is the second-best season. Bass feed aggressively before winter, water temperatures drop back into the 50s and 60s, and white perch return to the river on their way back to salt water. October is often the most consistent month for both species. By November, fishing slows as water temperatures drop below 50 degrees and fish become lethargic.

Winter (November through March) is slow and difficult. Ice forms on the upper sections, and fish are deep and inactive. A few anglers target pickerel through the ice in the upper river, but most fishing pressure moves elsewhere.

Access Points and How to Reach Them

The Thomaston boat launch is the most reliable public access point. It sits on the tidal section near the mouth and provides a paved ramp, parking, and access to both the lower river and the open water of St. George Harbor. This is the best entry for striped bass and white perch fishing in spring and fall. From Route 1 in Thomaston, follow signs to the public landing near the Thomaston waterfront.

The Waldoboro boat launch is on the middle river and provides access to a longer stretch of freshwater and brackish habitat. It is smaller than Thomaston but less crowded. From Route 1 in Waldoboro, turn toward the village and follow signs to the public landing near the bridge. This launch works best for smallmouth bass and pickerel.

Bridge crossings at Union and Liberty offer roadside parking and wade-in access to the upper river. These sections are shallower and better for wading than boating. The Union bridge on Route 131 and the Liberty bridge on Route 3 both have small pull-offs. These areas are less pressured and good for anglers without a boat.

Much of the riverbank is private property. Always ask permission before crossing land to reach the water, and respect posted signs. Some landowners allow access; others do not.

Species, Tackle, and Techniques

Smallmouth bass are the primary target and respond well to topwater lures in early morning and late evening, especially in spring and fall. Soft plastic tubes and crawfish imitations work year-round in deeper pools. Cast along rocky banks, fallen trees, and current breaks. A 6- to 7-foot medium-power spinning rod with 8- to 10-pound braided line is standard. Fish the upper and middle river for the best smallmouth populations.

White perch run upriver in spring and fall and school heavily in the lower tidal sections. Small shad-pattern crankbaits, spoons, and live shiners all work. Fish near the mouth and the first few miles upriver during the spring run (late April through May). A lighter spinning setup with 6- to 8-pound line is ideal. White perch average 8 to 12 inches but can reach 14 inches.

Striped bass enter the lower river during spring and fall migrations. Live mackerel or herring fished on the bottom near deeper holes produces the most consistent results. Larger stripers (15 to 25 inches) are possible but not common. Fish the tidal section near Thomaston and St. George Harbor. A heavier rod and 12- to 15-pound line is recommended.

Chain pickerel are present year-round in the upper river and are often overlooked. They hit small spinnerbaits and soft plastics and are fun on light tackle. They are not a primary target but a bonus catch.

Maine Fishing Regulations on the St. George

A Maine fishing license is required for anyone 16 and older. Licenses are available online through the Maine Department of Inland Fisheries and Wildlife website, at sporting goods stores, and at town offices. A three-day tourist license costs less than a full-year license and is a good option for visiting anglers.

Smallmouth bass have a 12-inch minimum size and a five-fish daily limit on most of the St. George. Largemouth bass follow the same rules. White perch have a 7-inch minimum and a 30-fish daily limit. Striped bass regulations vary by section and season; check the current regulations before fishing the tidal sections, as rules change year to year.

The river is open to fishing year-round for bass and pickerel, but specific seasons apply to other species. White perch season typically runs from April through October, though dates vary. Always check the Maine Department of Inland Fisheries and Wildlife website or call their hotline before your trip to confirm current rules.

Water Conditions and When to Fish

The St. George responds to rainfall. Heavy rain raises water levels and increases current, which can improve fishing by pushing baitfish and activating predators. However, extremely high water makes wading dangerous and can muddy the water, reducing visibility. Moderate rain followed by a day or two of clearing is ideal.

Tidal influence affects the lower river significantly. The best fishing in the tidal sections often occurs during the last two hours of the incoming tide and the first two hours of the outgoing tide, when current is moderate and fish are feeding. Slack tide (the period between tidal changes) can be slow. Check tide tables before fishing the lower river.

Water temperature is a reliable indicator of fish activity. Spring and fall, when temperatures are in the 50s and 60s Fahrenheit, produce the most consistent fishing. Summer heat pushes fish deep, and winter cold makes them inactive. A simple thermometer or a weather app showing water temperature helps you decide whether conditions are worth fishing.

Nearby Alternatives and When to Consider Them

If the St. George is too crowded or conditions are poor, the Medomak River (just south in Waldoboro) offers similar smallmouth bass fishing with less pressure. The Damariscotta River (to the north) is larger and holds striped bass and white perch in its tidal sections. The Kennebec River (to the west) is a major river with excellent striped bass and shad fishing in spring.

For saltwater fishing, St. George Harbor and the open Atlantic off the coast offer striped bass, mackerel, and other species. If you want to stay on freshwater but try something different, the lakes around Liberty and Union (such as Sheepscot Pond) hold bass and pickerel and are less tidal than the lower St. George.

Frequently Asked Questions

Do I need a boat to fish the St. George River?

No. The bridge crossings at Union and Liberty offer wade-in access to the upper river, and the roadside parking is free. A boat gives you access to more water and the tidal sections, but wading the upper river is productive and requires only a license and basic tackle.

What's the best time of year to fish for smallmouth bass?

Spring (April through May) and fall (September through October) are the most consistent. Water temperatures in the 50s and 60s Fahrenheit keep fish active and feeding throughout the day. Summer is slower because heat pushes bass deep, and winter is difficult because water temperatures drop below 50 degrees.

Can I fish the St. George River in winter?

Yes, but it is difficult. Ice forms on the upper sections, and fish are deep and inactive. A few anglers target chain pickerel through the ice, but most fishing pressure moves to other rivers or stops entirely. Spring and fall are much more productive.

Where can I buy bait or rent a boat on the St. George?

Bait and tackle shops in Thomaston and Waldoboro carry shiners, mackerel, and other live and dead bait. Boat rentals are not common on the St. George itself, but marinas in nearby Rockland and Camden rent boats and can advise on fishing the lower river and harbor.

What's the difference between the upper and lower river?

The upper river (near Liberty and Union) is freshwater, shallower, and holds smallmouth bass and pickerel. The lower river (near Thomaston and St. George) is tidal and brackish, holds striped bass and white perch, and is best fished by boat. The middle river (around Waldoboro) is a mix of both.