UPDATEDAUTO-REFRESH 5 MIN
Summer flounderShoulder seasonSpecies here · tap to switch
Best score today · 5 PM · Summer flounder
- Now
- 5110 PM EDT
- Best window
- 10 PM-12 AMEbb tide
- Tide now
- Ebbing4.5 ft ▼
Data from: NOAA CO-OPS + NDBC + ECMWF + Open-Meteo Marine · Waterlands engine
Notify me when Castle Island scores 75+
Checked every morning against the 14-day forecast. Free by push and email.
14-day forecast
Best days to fish
24-hour conditions · rolling from now
Conditions · 10 PM · now
Tide & current
NOAA CO-OPS
75Tide: EbbingCurrent: SlackWind & pressure
ECMWF
99Wind: 5 kt SSEPressure: FallingWater temp & sky
NDBC + Open-Meteo Marine
59Water temp: 65°F, primeLight: NightSolunar: Between periodsSeas: 1.1 ftSeason & habitat · Summer flounder
Species seasonality
44Season: ShoulderHabitat: Poor fitDepth: In rangeRegulations: no rule on file
Current regulations
What you can keep here today
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 today
Seasonality · 52-week view · this week ringed
When Summer flounder is best here
Shoulder season for Summer flounder · 1 more week at shoulder
- Peak
- Shoulder
- Off
- Not here
- This week
Spot profile
Castle Island
- Depth
- 5-50 ftNearest water
- Structure
- Point · Inner · Semi-exposedPoint · 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 Castle Island
Castle Island is a cape in Boston Harbor, Massachusetts. Depth in the nearest water is 5-50 ft, with a drop-off. Its profile reads point, inner water and semi-exposed.
Waterlands scores 10 species here; the best right now are striped bass, black sea bass and Atlantic cod. It is peak season now for striped bass, black sea bass, Atlantic cod and bluefish, and shoulder season for tautog and summer flounder. Striped bass peak from May through June and from September through October. 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.
- Striped bass
- Striped bass feed where moving tide pushes bait past structure: inlets, points, jetties, bridge pilings and rips in the surf, usually in 2 to 40 feet of water. Fish dawn, dusk and night hardest, casting plugs, bucktails and soft plastics or drifting live bunker and eels, and chunk bait on the bottom in current. In midsummer the larger fish drop deeper or feed mostly after dark.
- 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
- Reserved Channel76
Channel · 0.7 mi
Top: Striped bassPeak season- Striped bass 76
- Black sea bass 70
- Bluefish 65
5 kt SSEL 12:44 AM · 1.8 ftH 7:01 AM · 7.8 ft
- Dorchester Bay76
Bay · 0.9 mi
Top: Striped bassPeak season- Striped bass 76
- Bluefish 72
- Little tunny 69
5 kt SSEL 12:48 AM · 1.8 ftH 7:02 AM · 7.8 ft
- Lower Middle73
Bar · 0.8 mi
Top: BluefishPeak season- Bluefish 73
- Striped bass 71
- Little tunny 69
5 kt SSEL 12:44 AM · 1.8 ftH 7:02 AM · 7.6 ft
- Governors Island Flats70
Flat · 1.1 mi
Top: Striped bassPeak season- Striped bass 70
- Black sea bass 66
- Bluefish 66
5 kt SSEL 12:44 AM · 1.8 ftH 7:02 AM · 7.6 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.
