Waterlands

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Summer flounderShoulder season

Bar · Massachusetts

Shag Rocks

42.41°N · 70.91°W · Bar · Boston Harbor

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Best score today · 7 AM · Summer flounder

81/100Great
Now
575 AM EDT
Best window
6-10 AMHigh slack
Tide now
Flooding4.7 ft ▲

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

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24-hour conditions · rolling from now

Conditions · 5 AM · now

Time5ANOW
Score57Good
Tide4.7 ft ▲Flooding
CurrentFlood0.3 kn · toward WSW
Wind8 kn Ngusts 15 · steady
Sea stateLight chop1.3 ft · 4 s
Air temp55°Cool
WeatherOvercast63% chance of rain
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.

Source: MassDMF · synced yesterday

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

Shag Rocks

Depth
25-80 ftDrop-off
Structure
Ledge · Outer · ExposedLedge · drop-off
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 Shag Rocks

Shag Rocks is a bar in Boston Harbor, Massachusetts. Depth is 25-80 ft, with a drop-off. Its profile reads ledge, outer water and exposed.

Waterlands scores 10 species here; the best right now are scup, black sea bass and Atlantic cod. It is peak season now for scup, black sea bass, Atlantic cod and bluefish, and shoulder season for tautog and summer flounder. Scup peak from June through September. Black sea bass 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.
Scup
Scup school over hard and mixed bottom, rock piles, mussel beds, piers and jetties, usually in 10 to 60 feet of water. Fish a high-low rig with small hooks and squid or clam strips on the bottom, and chum with clam to hold a school under the boat. If nothing bites within 15 minutes, move to the next piece of structure.
Black sea bass
Black sea bass hold tight to wrecks, reefs, rock piles and jetties, from 15 feet inshore in late spring to well over 100 feet on offshore wrecks in late fall. Anchor or drift right over the structure and fish a two-hook high-low rig with squid or clam, or bounce a small jig on the bottom. The biggest males sit on the highest relief.

Nearby spots

Other spots within an easy run

  • East Point

    Cape · 0.4 mi

    74
    Top: ScupPeak season
    • Scup 74
    • Striped bass 74
    • Atlantic cod 71

    8 kt NH 8:04 AM · 7.5 ftL 1:52 PM · 2.4 ft

  • Nahant Harbor

    Bay · 0.9 mi

    73
    Top: ScupPeak season
    • Scup 73
    • Striped bass 72
    • Black sea bass 70

    8 kt NH 8:04 AM · 7.5 ftL 1:52 PM · 2.4 ft

  • Lewis Cove

    Bay · 1.3 mi

    71
    Top: ScupPeak season
    • Scup 71
    • Striped bass 71
    • Bluefish 69

    8 kt NH 8:04 AM · 7.5 ftL 1:52 PM · 2.4 ft

  • Johns Peril

    Bar · 1.3 mi

    71
    Top: BluefishPeak season
    • Bluefish 71
    • Little tunny 68
    • Atlantic cod 66

    8 kt NH 8:04 AM · 7.5 ftL 1:52 PM · 2.4 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.