Waterlands

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Summer flounderShoulder season

Bar · Massachusetts

Old Sump

42.46°N · 70.91°W · Bar · Boston Harbor

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Best score today · 5 PM · Summer flounder

75/100Great
Now
606 PM EDT
Best window
6 PM-12 AMEbb tide
Tide now
Flooding7.0 ft ▲

Data from: NOAA CO-OPS + NDBC + ECMWF + Open-Meteo Marine · Waterlands engine

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24-hour conditions · rolling from now

Conditions · 6 PM · now

Time6PNOW
Score60Good
Tide7.0 ft ▲Flooding
CurrentFlood0.1 kn · toward W
Wind4 kn ENEgusts 12 · steady
Sea stateLight chop1.8 ft · 5 s
Air temp63°Mild
WeatherMostly cloudy82% cloud
Water64°FObserved

Current regulations

What you can keep here today

IN EFFECT NOW

No rule for Summer flounder is on file here yet, so its status is unknown, not closed. Confirm limits with MassDMF before you keep a fish.

Seasonality · 52-week view · this week ringed

When Summer flounder is best here

Shoulder season for Summer flounder · 1 more week at shoulder

Summer flounder season by week of the year. Shoulder season for Summer flounder · 1 more week at shoulder.
  • Peak
  • Shoulder
  • Off
  • Not here
  • This week

Summer flounder in Massachusetts

Spot profile

Old Sump

Depth
7-35 ftSlope
Structure
Bar · Outer · ExposedBar · slope
Season
Shoulder seasonSummer flounder

NOAA NCEI DEM, sampled Sep 13 on a 3.4 m grid. Depths are feet below NAVD 88, not chart datum (MLLW), so they can differ from a chart by a few feet. Not for navigation.

About this spot

Fishing Old Sump

Old Sump is a bar in Boston Harbor, Massachusetts. Depth is 7-35 ft, with a slope. Its profile reads bar, outer water and exposed.

Waterlands scores 10 species here; the best right now are little tunny, bluefish and Atlantic cod. It is peak season now for little tunny, bluefish, Atlantic cod and scup, and shoulder season for tautog and summer flounder. Little tunny peak from September through October. Bluefish peak from June through July and in September. Atlantic cod peak from May through June and from September through October.

Tackle & technique

Summer flounder
Summer flounder lie half-buried on sand and shell bottom and ambush bait along channel edges, inlet bars and ocean reefs, from a few feet deep in back bays to about 100 feet offshore. Drift with the tide and bounce a bucktail tipped with a squid or fish strip along the bottom. The bigger fish move to ocean reefs and wrecks in late summer, so follow them out.
Little tunny
Little tunny travel fast in schools that pin bait against inlets, points, jetties and tide rips, usually within a few miles of shore and often in less than 60 feet. Stay off the school's path, wait for it to surface within range, and cast small metal or epoxy jigs with a fast retrieve. When fish stay down, troll small feathers along bait edges and color changes to find them.
Bluefish
Bluefish travel in size-sorted schools and feed where tide pushes bait past structure: inlet mouths, rips, shoal edges and the surf line, mostly in water shallower than 60 feet. Look for birds and breaking bait and cast metal or poppers into it, or soak cut bunker or mullet on the bottom from the beach. Use a short wire or heavy leader because their teeth cut light line.

Nearby spots

Other spots within an easy run

  • Fred Bliss Rocks

    Bar · 0.5 mi

    79
    Top: ScupPeak season
    • Scup 79
    • Black sea bass 76
    • Little tunny 75

    4 kt ENEH 8:08 PM · 8.6 ftL 2:38 AM · 1.5 ft

  • Tedesco Rocks

    Bar · 0.5 mi

    79
    Top: ScupPeak season
    • Scup 79
    • Black sea bass 76
    • Little tunny 75

    4 kt ENEH 8:08 PM · 8.6 ftL 2:38 AM · 1.5 ft

  • Blaney Rock

    Cape · 0.5 mi

    78
    Top: ScupPeak season
    • Scup 78
    • Little tunny 76
    • Black sea bass 75

    4 kt ENEH 8:08 PM · 8.6 ftL 2:38 AM · 1.5 ft

  • Lincoln House Point

    Cape · 0.1 mi

    76
    Top: Little tunnyPeak season
    • Little tunny 76
    • Striped bass 74
    • Bluefish 70

    4 kt ENEH 8:08 PM · 8.6 ftL 2:38 AM · 1.5 ft

Scores and forecasts are for planning only and can be wrong. Conditions on the water change fast; check the marine forecast before you go. Regulations change during the season, so confirm limits and closures with MassDMF before you keep a fish.