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RiverSuffolk County, NYData checked Oct 4, 2026

Carmans River fishing guide

A 13-mile river in Suffolk County, New York. The state agency lists 3 species here and last stocked it in October 2025. It has 1 public access point and 1 live sensor on the water.

Map of Carmans River: the water in blue, public access points in orange, sensors in green, county lines dashed
Water Access Sensor Drawn from USGS and agency data; not for navigation.
13 mi
long
3
species listed
99
stocking records in 10 years
1
public access points

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Live sensors on this water

Carmans River flow

Flow gauge: Carmans River at Yaphank NY, USGS 01305000 . The forecast above shows its latest reading and band: Fishable up to this month's typical high (75th percentile), High up to the 90th percentile, Blown out above that.

Typical flow by month

Typical is the middle half of daily mean flows in that month (25th to 75th percentile), from 20–21 years of USGS records.

MonthTypical flow (cfs)Median (cfs)Blown out above (cfs)
January19–262333
February20–262332
March21–302538
April22–292638
May22–292539
June20–292336
July19–262234
August19–252131
September17–242027
October17–242029
November16–252128
December18–272433

Flow over the last 72 hours at this and nearby gauges

Fish species in Carmans River

Species on the official fishing-waters list from New York State Department of Environmental Conservation. Species links open our guide to that fish in New York.

SpeciesStatusLast stocked
Brook TroutAgency list—
Brown TroutAgency listOct 2025
Rainbow TroutAgency listMay 2025

Stocking history

Last stocked October 2025: brown trout catchable. 99 stocking records in the last 10 years, 23,460 fish in all, from New York State Department of Environmental Conservation. Each row below sums the agency's records for one month, species and size.

DateSpeciesSizeFish stocked
Oct 2025Brown Troutcatchable170
May 2025Brown Troutcatchable40
May 2025Rainbow Troutcatchable360
Apr 2025Brown Troutcatchable180
Apr 2025Brown Troutyearling360
Apr 2025Rainbow Troutyearling780
Mar 2025Brown Troutcatchable200
Mar 2025Brown Troutyearling360
Sep 2024Brown Troutcatchable170
May 2024Brown Troutcatchable40
May 2024Rainbow Troutcatchable350
Apr 2024Brown Troutcatchable140
Apr 2024Brown Troutyearling350
Apr 2024Rainbow Troutcatchable750
Mar 2024Brown Troutcatchable200
Mar 2024Brown Troutyearling350
Sep 2023Brown Troutcatchable170
Apr 2023Brown Troutcatchable180
Apr 2023Brown Troutyearling350
Apr 2023Rainbow Troutcatchable350
43 earlier rows, back to Mar 2017
DateSpeciesSizeFish stocked
Apr 2023Rainbow Troutyearling400
Mar 2023Brown Troutcatchable580
Mar 2023Rainbow Troutcatchable350
Sep 2022Brown Troutcatchable170
Apr 2022Brown Troutcatchable530
Apr 2022Rainbow Troutcatchable750
Mar 2022Brown Troutcatchable580
Mar 2022Rainbow Troutcatchable350
Oct 2021Brown Troutcatchable200
Apr 2021Brown Troutcatchable370
Apr 2021Brown Troutyearling350
Apr 2021Rainbow Troutcatchable350
Apr 2021Rainbow Troutyearling750
Mar 2021Brown Troutcatchable40
Mar 2021Brown Troutyearling350
Oct 2020Brown Troutcatchable200
May 2020Brown Troutcatchable650
May 2020Rainbow Troutyearling670
Mar 2020Brown Troutcatchable150
Mar 2020Brown Troutyearling180
Mar 2020Rainbow Troutyearling600
Oct 2019Brown Troutcatchable200
May 2019Brown Troutcatchable400
Apr 2019Brown Troutcatchable100
Apr 2019Brown Troutyearling270
Apr 2019Rainbow Troutcatchable900
Mar 2019Brown Troutcatchable150
Mar 2019Brown Troutyearling220
Mar 2019Rainbow Troutcatchable800
Oct 2018Brown Troutcatchable200
May 2018Brown Troutcatchable390
Apr 2018Brown Troutcatchable580
Apr 2018Rainbow Troutcatchable780
Mar 2018Brown Troutcatchable370
Mar 2018Rainbow Troutcatchable700
Oct 2017Brown Troutcatchable200
May 2017Brown Troutcatchable370
Apr 2017Brown Troutcatchable100
Apr 2017Brown Troutyearling250
Apr 2017Rainbow Troutcatchable900
Mar 2017Brown Troutcatchable150
Mar 2017Brown Troutyearling210
Mar 2017Rainbow Troutcatchable800

Plus 11 stocking records before October 2016 in the agency data.

Search stocking by water and date · Agency stocking reports

Public access and boat launches

1 carry-in launch from New York State Department of Environmental Conservation; orange dots on the map above.

  • Carmans River boat launch
    Hand Launch · near South Haven
    10 car spaces
    Carry-in

Find boat ramps near you

Regulations

No special regulations for Carmans River in our data. New York statewide rules apply unless the agency lists a special rule for this water. Seasons, limits and size rules change: check New York fishing regulations before every trip.

Licence: New York fishing licences from New York State Department of Environmental Conservation.

Carmans River fishing FAQ

What fish are in Carmans River?

New York State Department of Environmental Conservation lists 3 species for Carmans River: brook trout, brown trout and rainbow trout.

When was Carmans River last stocked?

New York State Department of Environmental Conservation last stocked Carmans River in October 2025 with brown trout. Our data has 99 stocking records in the last 10 years.

Where can I launch a boat on Carmans River?

The agency lists 1 carry-in launch for Carmans River, near South Haven. Each one is listed in the access section with parking and toilets where the agency records them.

Is there a flow gauge on Carmans River?

Yes. USGS gauge 01305000 (Carmans River at Yaphank NY) measures flow on Carmans River. Its median daily flow runs from about 20 cfs in September to 26 cfs in April. Today's reading is in the forecast at the top of this page; the flow section has the typical range by month.

Sources: NOAA CO-OPS, Tides and Currents stations, predictions and observations · New York State DEC, Boat launch sites · New York State DEC, Recommended Fishing Lakes and Ponds (mw8j-wduf); Recommended Fishing Rivers and Streams (tjny-fki3), on data.ny.gov · New York State DEC, Fish stocking lists on data.ny.gov · U.S. Geological Survey, Geographic Names Information System, domestic names · U.S. Geological Survey, National Hydrography Dataset, high resolution, state geodatabases (NHDWaterbody, NHDFlowline); 3DHP when it replaces it · U.S. Geological Survey, Water Data OGC API (monitoring locations, discharge, gage height, water temperature). Checked: Oct 4, 2026. Official links open the agency page. How we use data