BirdTrout

Mohawk River, New York

13.3 mapped river miles, draining 3,432 square miles, in the Mohawk basin watershed. 10 USGS gauges report water temperature on it, and this page reads all 10.

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Public land — where the bank is open to walk and fish

USGS gauge — live water temperature

Water temperature — the colour of the river, and of every dot on it

58 64 70

50°F and colder is cold, through cold-transitional and cool, to warm above 70°F — the same four bands, breaking at 58, 64 and 70°F, that the app paints. Grey is water nobody has measured.

Water temperature right now

Live from the USGS — every pill above is live, so the numbers you are reading are the latest continuous readings at each gauge. Provisional and unreviewed, as all real-time data is. If that fetch cannot happen — you are offline, or the USGS is down — the pills fall back to the last value we cached, 1 October 2026, 02:35 UTC. Not all of them, though: Ilion Ny, Lock 8 near Schenectady Ny, Rexford Ny, Diversion To Power Plant at Cohoes Ny, and Hudson River at Green Island Ny are not reporting water temperature. Those pills carry a modelled temperature where one can be fitted, marked as modelled, and a dash where it cannot — never a stale reading dressed as a current one.

Thermal classification

Each gauge carries a July mean built from its own daily record — 6 Julys, 2019–2025, measured rather than modelled. A July mean is what decides which of the four bands a stretch of water belongs to, because July is when a trout river either holds or does not.

Every gauge sits at the bottom of its segment, so each number is the warm end and the water above it runs colder. ±2.33 °F on the fit.

Questions about this river

• Mohawk River fishing report — what it reads right now
• When to fish the Mohawk River — hatches, seasons and temperature
• How to get to the Mohawk River — access, parking and public land
• Mohawk River fishing regulations — season, size and gear by reach

NYSDEC classification

NYSDEC classifies this water as Class A — drinking water source, Class B — swimming and contact recreation, and Class C — fishing. More than one class appears because the classification changes along the river. The thermal bar above shows where. On those reaches DEC also designates it trout spawning waters, trout waters — which is the half of the classification that is about temperature, and the half this map paints by. The class is a designation of best usage under 6 NYCRR — what the water is protected for — and not the season and creel rules, which change yearly and live with the agency.

NYSDEC water quality classifications and standards →

Fishable reaches

River miles are measured above the mouth, along the mapped mainstem. The reach breaks are the gauges, which is also how the temperature model divides the river.

5 mapped access sites on the mainstem: 4 walk-in, 1 boat or canoe launches. Source: NYSDEC.

USGS gauges

Every gauge on the mainstem, upstream first. Links go to the USGS monitoring-location page for the site.

• Mohawk River at Ilion Ny — 01342732 · RM 0.0
  183 July days of record across 6 Julys (2019–2025)
• Mohawk R above State Highway 30A at Fonda Ny — 01349527 · RM 0.0
  123 July days of record across 4 Julys (2022–2026) · 1,650 cfs at last read
• Mohawk R Blw Pepper Island at Fort Johnson Ny — 0135403025 · RM 0.0
  244 July days of record across 8 Julys (2019–2026)
• Mohawk River at Amsterdam Ny — 01354083 · RM 0.0
  155 July days of record across 5 Julys (2022–2026) · 3,700 cfs at last read
• Mohawk River at Lock 9 at Rotterdam Junction Ny — 01354230 · RM 0.0
  155 July days of record across 5 Julys (2022–2026)
• Mohawk River at Lock 8 near Schenectady Ny — 01354330 · RM 0.0
  200 July days of record across 7 Julys (2019–2025)
• Mohawk River at Rexford Ny — 01355475 · RM 0.0
  186 July days of record across 6 Julys (2019–2025)
• Mohawk River Diversion To Power Plant at Cohoes Ny — 0135749950 · RM 0.0
  244 July days of record across 8 Julys (2019–2026)
• Mohawk River at Cohoes Ny — 01357500 · RM 0.0
  93 July days of record across 3 Julys (2024–2026) · 4,450 cfs at last read
• Hudson River at Green Island Ny — 01358000 · RM 0.0
  244 July days of record across 8 Julys (2019–2026) · 8,020 cfs at last read

Public land on the river

1 unit of public or open-access land touches this river, 2,864 acres in total. Acreage is the whole unit, not the part beside the water.

Species

NYSDEC designates this as trout water — Trout spawning waters, Trout waters — without naming the species. No fish survey or stocking record for this water is in the files this site reads.

Historical July mean

The measured record behind every temperature band on this page: the mean of the daily means for July, at each gauge, over the years USGS has one.

Tributaries and watershed

2 named streams meet this one. Confluence miles are above the mouth; the longest twelve are listed.

• Shakers Creek 6.5 mi · RM 11.6
• Delphus Kill 3.0 mi · RM 9.5

Mohawk River sits in HUC 8 02020004, the Mohawk basin, and drains 3,432 square miles, Strahler order 8 at the mouth. 352 NHD reaches carry the name for 158.0 miles in total — more than the 13.3 miles of drawn mainstem, because NHD counts side channels and braids as their own reaches.

Other water nearby

The closest 6 rivers on this site, straight-line from the middle of this one — not drive time.

• Flat Creek 4.9 mi
• Canajoharie Creek 6.6 mi
• Kayaderosseras Creek 6.9 mi
• Hale Creek 7.4 mi
• South Chuctanunda Creek 7.8 mi
• Cobleskill Creek 8.1 mi