Green Lake
Washington County, Wisconsin
About Green Lake
Green Lake earns its reputation as one of Washington County's premier walleye fisheries, a intimate 70-acre lake reaching 37 feet at its deepest. The lake has public boat landing access, making it easy to launch for a day on the water. Anglers target Largemouth Bass and Panfish. Note that invasive species (Banded Mystery Snail, Curly-Leaf Pondweed, Eurasian Water-Milfoil, Hybrid Eurasian / Northern Water-Milfoil, Ornamental water lilies (non-native Nymphaea sp.), Starry Stonewort) have been documented here — clean your boat before leaving.
Bottom composition: 65% sand, 10% gravel, 0% rock, 25% muck
Type: lake · Hydrology: SEEPAGE
Lake Location
43.45980° N, 88.10120° W
WBIC 28100 · Wisconsin DNRFish Species
Full table →Fishing Tips
- ·Walleye feed most actively at dawn and dusk. Jig along deep structural breaks or troll crankbaits along weedlines at 6–8 ft depth.
- ·Night fishing under a full moon can produce excellent walleye results from late June through August.
- ·Northern pike are ambush predators — target weed edges, fallen timber, and points with large spoons or swimbaits.
- ·Spring pike fishing (ice-out through June) can be outstanding as they move into shallow, warming bays to spawn.
- ·Largemouth bass relate to shallow structure. Work topwater lures at dawn in summer, then switch to soft plastics rigged weedless around lily pads and fallen wood.
- ·Bluegill and crappie stack up in 8–15 ft of water near weedlines. Small jigs tipped with a waxworm are hard to beat.
- ·Panfish are often excellent for kids and beginners — look for them around any dock or submerged brush piles.
Local's Guide
Fishing
Species-specific tips above. Wisconsin fishing license required for ages 16+. See current season regulations below.
View fishing regulations ↓Swimming
Green Lake has limited visibility and a gravel and sand bottom, making it better suited for boating and fishing than swimming. The 70-acre lake offers a quieter, more intimate swimming experience.
Nearby Dining
Local dining recommendations for Green Lake are coming soon. Know a great spot near Green Lake? Share it at staynorthern.com/contact. Looking for restaurants near Washington County lakes? Visit staynorthern.com/eats for our full northwoods dining guide.
Insider Tips
Green Lake is one of Washington County's lesser-known gems — the kind of place locals return to year after year. Early mornings before 9am offer the calmest water and best fishing before boat traffic picks up. If you're visiting for the first time, check the DNR boat landing locations before you arrive — some are well-marked, others take a local to find. Know something about Green Lake that visitors should? Share a tip at staynorthern.com/contact — we add the best ones to this page.
Lake Conditions
Water Clarity
—
No data
Trophic Status
—
No data
Invasive Weeds
Present
Banded Mystery Snail, Curly-Leaf Pondweed, Eurasian Water-Milfoil, Hybrid Eurasian / Northern Water-Milfoil, Ornamental water lilies (non-native Nymphaea sp.), Starry Stonewort
Seasonal Notes
See below
Ice-out dates, peak fishing windows
Ice out arrives in late March to early April on southern Wisconsin lakes. Bass and panfish fishing is excellent from early May onward. Swimming season runs from early June through September. Fall color peaks in mid-October. Ice fishing is possible in most winters but season length varies — check conditions before heading out.
Condition data sourced from Wisconsin DNR surveys. Real-time weed and clarity reports coming soon.
Invasive Species Present
Banded Mystery Snail and Curly-Leaf Pondweed and Eurasian Water-Milfoil and Hybrid Eurasian / Northern Water-Milfoil and Ornamental water lilies (non-native Nymphaea sp.) and Starry Stonewort have been documented in Green Lake. Clean, drain, and dry all watercraft and equipment before leaving.
Report sightings to the Wisconsin DNR invasive species hotline.Frequently Asked Questions
What fish can you catch in Green Lake?
Green Lake is home to Largemouth Bass (Common), Northern Pike, Panfish (Common), and Walleye. Wisconsin fishing regulations apply — check current seasons and size limits before heading out.
Is there a public boat launch on Green Lake?
Yes — Green Lake has a public boat landing providing watercraft access. Check for posted local ordinances at the landing before launching.
How big is Green Lake?
Green Lake has 70 acres in surface area, a maximum depth of 37 feet, a mean depth of 17 feet.
What is the bottom of Green Lake like?
The lake bottom is composed of 65% sand, 10% gravel, 0% rock, 25% muck. Sandy and gravel bottoms typically support good swimming and healthy fish habitat.
Are there invasive species in Green Lake?
Yes — Banded Mystery Snail and Curly-Leaf Pondweed and Eurasian Water-Milfoil and Hybrid Eurasian / Northern Water-Milfoil and Ornamental water lilies (non-native Nymphaea sp.) and Starry Stonewort have been documented in Green Lake. Please clean, drain, and dry your watercraft and all equipment before leaving any Wisconsin water body to prevent the spread of invasive species.
Where is Green Lake located?
Green Lake is located in Washington County, Wisconsin. GPS coordinates: 43.4598° N, 88.1012° W.
Are there vacation rentals on Green Lake?
Stay Northern is building the most complete rental directory for Washington County lakes. Check our Green Lake vacation rentals listing — if none are available yet, check back soon or browse nearby Washington County lake rentals.
Fishing Regulations
Current season regulations for Green Lake
| Species | Season | Min. Length | Daily Bag |
|---|---|---|---|
| Bullheads | Open All Year | No minimum length limit and the daily bag limit is unlimited. | — |
| Catfish | Open All Year | No minimum length limit and the daily bag limit is 10. | — |
| Cisco And Whitefish | Open All Year | No minimum length limit and the daily bag limit is 10. | — |
| Lake Sturgeon | Closed | No fishing allowed. | — |
| Largemouth Bass And Smallmouth Bass | May 2, 2026 to March 7, 2027 | The minimum length limit is 14" and the daily bag limit is 5. | — |
| Muskellunge And Hybrids | May 2, 2026 to December 31, 2026 on open water | The minimum length limit is 40" and the daily bag limit is 1. | — |
| Northern Pike | May 2, 2026 to March 7, 2027 | The minimum length limit is 26" and the daily bag limit is 2. | — |
| Paddlefish | Closed | No fishing allowed. | — |
| Panfish | Open All Year | No minimum length limit and the daily bag limit is 10. | — |
| Rock, Yellow, And White Bass | Open All Year | No minimum length limit and the daily bag limit is unlimited. | — |
| Rough Fish | Open All Year | No minimum length limit and the daily bag limit is unlimited. | — |
| Round Goby | Open All Year | The daily bag limit is 0, one may be killed and possessed for transport to a WDNR Office. | — |
| Ruffe | Open All Year | The daily bag limit is 0, one may be killed and possessed for transport to a WDNR Office. | — |
| Shovelnose Sturgeon | Closed | No fishing allowed. | — |
| Trout | See specific regulations | https://dnr.wisconsin.gov/topic/fishing/trout/ . | — |
| Walleye, Sauger, And Hybrids | May 2, 2026 to March 7, 2027 | The minimum length limit is 18" and the daily bag limit is 3. | — |
| White Perch | Open All Year | The daily bag limit is 0, one may be killed and possessed for transport to a WDNR Office. | — |
Regulations sourced from Wisconsin DNR fisheries data. Always verify current regulations before fishing.
Lake Details
- WBIC
- 28100
- County
- Washington County
- Surface Area
- 70 acres
- Max Depth
- 37 ft
- Mean Depth
- 17 ft
- Bottom
- 65% sand, 10% gravel, 0% rock, 25% muck
- Lake Type
- lake
- Coordinates
- 43.4598, -88.1012
Boat Rentals Nearby
Pontoon
Listing soonFishing Boat + Motor
Listing soonKayak / Canoe
Listing soonKnow a local boat rental operator near Green Lake? Let us know.
Boat Landings (1)
Town of Farmington · 262-447-1018
Lake data sourced from the Wisconsin DNR. Last updated 4/30/2026.