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Best winter flounder lakes in Massachusetts

34 Massachusetts waters list winter flounder (official records or labelled estimates), 34 mapped with survey or official-chart depth data. Ranked below by size and depth-data quality, leading with the waters in our reviewed search catalog — open any water to see exactly where to fish it: depth contours, scored spots with plain-English reasons, seasonal windows and bait picks. A cold-water inshore flatfish of Northeast harbors — spawning in protected shallows, then settling along mud, sand and channel edges.

1. Buzzards Bay — 146 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #1: survey-backed contours receive the ranking's data-quality boost · 5 public access sites
2. Plymouth Bay — 66 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #2: survey-backed contours receive the ranking's data-quality boost · 1 public access site
3. Plymouth Harbor — 37 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #3: survey-backed contours receive the ranking's data-quality boost · 1 public access site
4. Nantucket Harbor — 42 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #4: survey-backed contours receive the ranking's data-quality boost · 1 public access site
5. Duxbury Bay — 34 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #5: survey-backed contours receive the ranking's data-quality boost · 1 public access site
6. Edgartown Harbor — 38 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #6: survey-backed contours receive the ranking's data-quality boost · 1 public access site
7. Sippican Harbor — 25 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #7: survey-backed contours receive the ranking's data-quality boost · 1 public access site
8. Cape Poge Bay — 19 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #8: survey-backed contours receive the ranking's data-quality boost · 3 public access sites, 2 carry-in or shore-oriented
9. Hyannis Harbor — 26 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #9: survey-backed contours receive the ranking's data-quality boost · 1 public access site
10. Head of The Harbor — 25 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #10: survey-backed contours receive the ranking's data-quality boost · 2 public access sites, 1 carry-in or shore-oriented
11. Acushnet River — 53 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #11: survey-backed contours receive the ranking's data-quality boost · 1 public access site
12. Centerville Harbor — 25 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #12: survey-backed contours receive the ranking's data-quality boost · 1 public access site
13. Chatham Harbor — 45 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #13: survey-backed contours receive the ranking's data-quality boost · 1 public access site, 1 carry-in or shore-oriented
14. Pleasant Bay — 24 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #14: survey-backed contours receive the ranking's data-quality boost · 1 public access site
15. Vineyard Haven Harbor — 45 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #15: survey-backed contours receive the ranking's data-quality boost · 1 public access site
16. Madaket Harbor — 24 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #16: survey-backed contours receive the ranking's data-quality boost · 1 public access site
17. Nasketucket Bay — 22 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #17: survey-backed contours receive the ranking's data-quality boost · 1 public access site
18. Katama Bay — 19 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #18: survey-backed contours receive the ranking's data-quality boost · 1 public access site
19. Lagoon Pond — 41 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #19: survey-backed contours receive the ranking's data-quality boost · 1 public access site
20. Menemsha Bight — 43 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #20: survey-backed contours receive the ranking's data-quality boost · 1 public access site
21. Warren Cove — 39 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #21: survey-backed contours receive the ranking's data-quality boost · 1 public access site
22. Stage Harbor — 21 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #22: survey-backed contours receive the ranking's data-quality boost · 1 public access site
23. Menemsha Pond — 27 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #23: survey-backed contours receive the ranking's data-quality boost · 1 public access site
24. Clarks Cove — 25 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #24: survey-backed contours receive the ranking's data-quality boost · 1 public access site
25. Little Pleasant Bay — 18 ft max · real survey depth contours · Striped Bass, Summer Flounder (Fluke), Winter Flounder, BluefishWhy #25: survey-backed contours receive the ranking's data-quality boost · 1 public access site

…plus 9 more Massachusetts waters holding winter flounder.

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When to fish winter flounder in Massachusetts

• Spring 2–18 ft — Fish soft mud, sand and the shallow side of measured channel shoulders with a slow bottom presentation; the exact Setauket assessment identifies spring as the local fishery season.
• Summer 8–30 ft — Most fish favor cooler, deeper water or leave small warm embayments; treat summer marks as low-confidence holding-water searches rather than a dependable bite.
• Fall 6–25 ft — As water cools, probe mud-to-channel transitions slowly and confirm fish locally before repeating a drift.
• Winter 3–20 ft — Winter flounder use protected inshore spawning habitat; use a slow bottom rig and avoid treating a mapped zone as proof of current concentration.

Also in Massachusetts: best largemouth bass lakes · best smallmouth bass lakes · best northern pike lakes · best crappie lakes · best bluegill lakes · best rainbow trout lakes · best striped bass lakes · best yellow perch lakes · best common carp lakes · best brown trout lakes · best brook trout lakes · best chain pickerel lakes · best rock bass lakes · best white perch lakes · best pumpkinseed lakes · best brown bullhead lakes · best summer flounder (fluke) lakes · best bluefish lakes · best black sea bass lakes · best scup (porgy) lakes · best tautog (blackfish) lakes · best atlantic mackerel lakes · best atlantic cod lakes

Winter Flounder elsewhere: Maine · New York · Connecticut · Nova Scotia