New York / Waters /

Great South Bay

Bay in New York, near Babylon, Bay Shore, Bellport, East Islip, East Patchogue, Islip, Lindenhurst, Mastic Beach and West Islip

No current status shown

No current status is assigned to this water outline. Check the water page for reports and any estimated downstream stretches. Why this status, and its source

Map sources: water outlines and launches from OpenBoatLaunch and OpenStreetMap contributors (Open Database License); wastewater outlets from EPA and state records; downstream estimates by DirtyWaterWatch using U.S. Geological Survey maps and flow data. Base map: OpenFreeMap and OpenMapTiles.

Square boat markers mark boat launches listed by OpenBoatLaunch.

Bookmark this water page and check it before each trip · Report a missing notice or error

About this status

Why this status: No current status: no report we track sets a status on this water outline now.

How long each status lasts, and why

Sources checked: State Park beaches (last successful check 2026-11-02 21:20 UTC). Status by DirtyWaterWatch, updated 2026-11-02 21:26 UTC.

No status does not mean the water is safe. Follow posted signs and local health advice.

Updated Nov 2, 2026, 4:26 PM EST.

The last 90 days

Last 90 days, hour by hour. Red: discharge or advisory reported. Amber: caution. Hatched amber: end not confirmed. Grey: no current status on the water outline. Purple hatching: source update overdue.

No discharge, advisory or caution periods are shown for this water in this time span. Check downstream stretches and source coverage.

Source: DirtyWaterWatch calculations using the reports named above and the published status rules. Updated 2026-11-02 21:26 UTC.

Reported discharges over time

Historical charts are not available here. See the reports and sources on this page.

Reports linked to Great South Bay

Reports linked to Great South Bay, newest first
Start	End	Sewer operator	Outlet	Type	Volume	Source	Links
Aug 25, 2025	Aug 26, 2025	not stated	Heckscher SP: West Beach	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record heckscher-sp-west-beach:great-south-bay:2025-08-25, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jul 22, 2025	Jul 23, 2025	not stated	Heckscher SP: West Beach	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record heckscher-sp-west-beach:great-south-bay:2025-07-22, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Jul 1, 2025	Jul 2, 2025	not stated	Heckscher SP: West Beach	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record heckscher-sp-west-beach:great-south-bay:2025-07-01, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Jul 30, 2024	Jul 31, 2024	not stated	Heckscher SP: Overlook (East) Beach	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record heckscher-sp-overlook-east-beach:great-south-bay:2024-07-30, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Jul 30, 2024	Aug 2, 2024	not stated	Heckscher SP: West Beach	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record heckscher-sp-west-beach:great-south-bay:2024-07-30, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Jul 23, 2024	Jul 26, 2024	not stated	Heckscher SP: West Beach	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record heckscher-sp-west-beach:great-south-bay:2024-07-23, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Jul 2, 2024	Jul 3, 2024	not stated	Robert Moses SP (Field 2)	Beach advisory	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record robert-moses-sp-field-2:atlantic-ocean:2024-07-02, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Jul 2, 2024	Jul 3, 2024	not stated	Robert Moses SP (Field 3)	Beach advisory	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record robert-moses-sp-field-3:atlantic-ocean:2024-07-02, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Aug 25, 2021	Aug 26, 2021	not stated	Robert Moses SP (Field 2)	Beach advisory	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record robert-moses-sp-field-2:atlantic-ocean:2021-08-25, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Aug 23, 2021	Aug 24, 2021	not stated	Heckscher SP: Overlook (East) Beach	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record heckscher-sp-overlook-east-beach:great-south-bay:2021-08-23, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Aug 23, 2021	Aug 24, 2021	not stated	Heckscher SP: West Beach	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record heckscher-sp-west-beach:great-south-bay:2021-08-23, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Aug 16, 2021	Aug 18, 2021	not stated	Heckscher SP: Overlook (East) Beach	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record heckscher-sp-overlook-east-beach:great-south-bay:2021-08-16, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Aug 10, 2021	Aug 12, 2021	not stated	Robert Moses SP (Field 2)	Beach advisory	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record robert-moses-sp-field-2:atlantic-ocean:2021-08-10, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Jul 27, 2021	Jul 29, 2021	not stated	Robert Moses SP (Field 2)	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record robert-moses-sp-field-2:atlantic-ocean:2021-07-27, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Jul 27, 2021	Jul 28, 2021	not stated	Robert Moses SP (Field 3)	Beach advisory	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record robert-moses-sp-field-3:atlantic-ocean:2021-07-27, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Aug 18, 2020	Aug 20, 2020	not stated	Heckscher SP: Overlook (East) Beach	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record heckscher-sp-overlook-east-beach:great-south-bay:2020-08-18, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Aug 5, 2020	Aug 7, 2020	not stated	Robert Moses SP (Field 2)	Beach advisory	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record robert-moses-sp-field-2:atlantic-ocean:2020-08-05, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Aug 7, 2019	Aug 8, 2019	not stated	Robert Moses SP (Field 3)	Beach advisory	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record robert-moses-sp-field-3:atlantic-ocean:2019-08-07, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Aug 22, 2018	Aug 23, 2018	not stated	Robert Moses SP (Field 3)	Beach advisory	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record robert-moses-sp-field-3:atlantic-ocean:2018-08-22, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Jul 23, 2018	Jul 24, 2018	not stated	Heckscher SP: West Beach	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record heckscher-sp-west-beach:great-south-bay:2018-07-23, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Jul 24, 2017	Jul 25, 2017	not stated	Heckscher SP: West Beach	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record heckscher-sp-west-beach:great-south-bay:2017-07-24, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Jul 11, 2017	Jul 12, 2017	not stated	Heckscher SP: West Beach	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record heckscher-sp-west-beach:great-south-bay:2017-07-11, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
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Aug 4, 2015	Aug 5, 2015	not stated	Heckscher SP: West Beach	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record heckscher-sp-west-beach:great-south-bay:2015-08-04, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jun 29, 2015	Jul 2, 2015	not stated	Heckscher SP: Overlook (East) Beach	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record heckscher-sp-overlook-east-beach:great-south-bay:2015-06-29, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jun 29, 2015	Jul 1, 2015	not stated	Heckscher SP: West Beach	Beach closure	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record heckscher-sp-west-beach:great-south-bay:2015-06-29, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year

Showing the latest 25 records of 26 records. See them all with filters.

All reports in New York by year: 2025 (3 here) · 2024 (5 here) · 2021 (7 here) · 2020 (2 here) · 2019 (1 here) · 2018 (2 here) · 2017 (2 here) · 2015 (4 here)

Beaches named in these records: Heckscher SP: Overlook (East) Beach, Heckscher SP: West Beach, Robert Moses SP (Field 2), Robert Moses SP (Field 3).

Wastewater outlets on this water

Outfall: a pipe or outlet where wastewater enters a water body.

No wastewater outlet in our records is linked to this water.

Boat launches

Babylon Village Boat Ramp · Boat ramp · permit or residents only
Bay Shore Marina · Boat ramp · permit or residents only
Bellport Village Marina Boat Ramp · Boat ramp · permit or residents only
Captree State Park, West Islip · Boat ramp
Captree State Park, Islip · Boat ramp
East Islip Marina · Boat ramp
Heckscher State Park, East Islip · Boat ramp
Pine Neck Boat Ramp, East Patchogue · Boat ramp
Smith Point County Marina, Mastic Beach · Boat ramp
Venetian Shores, Lindenhurst · Boat ramp
West Islip Marina and Beach · Boat ramp · permit or residents only

Source: OpenBoatLaunch launch records (public agency data and OpenStreetMap, Open Database License). · Great South Bay on OpenBoatLaunch

Nearby waters

Lake Ronkonkoma, NY Discharge or advisory reportedSource update overdue about 15 km away
Smithtown Bay, NY No current status shown about 27 km away
Port Jefferson Harbor, NY No current status shown about 30 km away
Hempstead Bay, NY No current status shown about 35 km away
Peconic River, NY No current status shown about 43 km away

Sources covering this water

State Park beaches · Latest check succeeded · Last successful check: 2026-11-02 21:20 UTC

26 records linked to this water. Updated Nov 2, 2026, 4:26 PM EST.