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Lake Ontario Water Level Today

Today’s level at the Oswego, NY gauge, compared with last year and the long-term average for November.

Updated 9:48 PM EST, Nov 7, 2026 · Source: NOAA station 9052030 Provisional

Water level Provisional

245.20ft

IGLD 1985 · Oswego, NY gauge, 9:48 PM EST, Nov 7, 2026

  • +0.66 ftvs a year ago (244.54 ft)
  • +0.56 ftlake-wide average (245.11 ft, Nov 6) vs November long-term average (244.55 ft)
  • +0.02 ftin 24 h−0.07 ft in 7 days
243.5244.0244.5245.0245.5246.0246.5247.0243.5244.0244.5245.0245.5246.0246.5247.0
  • November average
  • 1 yr ago

Is Lake Ontario high or low?

Lake Ontario is about 0.7 ft higher than a year ago at the Oswego, NY gauge. The lake-wide level is 0.56 ft above its long-term November average.

Lake Ontario water temperature: 56.8°F

Lake Ontario level history

View data table
DateLevel (ft)% full
Nov 7, 2026245.20—
Nov 5, 2026245.09—
Nov 4, 2026245.07—
Nov 3, 2026245.09—
Nov 2, 2026245.12—
Nov 1, 2026245.13—
Oct 31, 2026245.17—
Oct 30, 2026245.27—
Oct 29, 2026245.15—
Oct 28, 2026245.14—
Oct 27, 2026245.18—
Oct 26, 2026245.27—
Oct 25, 2026245.24—
Oct 24, 2026245.26—
Oct 23, 2026245.32—
Oct 22, 2026245.41—
Oct 21, 2026245.40—
Oct 20, 2026245.43—
Oct 19, 2026245.43—
Oct 18, 2026245.47—
Oct 17, 2026245.56—
Oct 16, 2026245.57—
Oct 15, 2026245.48—
Oct 14, 2026245.59—
Oct 13, 2026245.52—
Oct 12, 2026245.53—
Oct 11, 2026245.52—
Oct 10, 2026245.58—
Oct 9, 2026245.71—
Oct 8, 2026245.73—
Oct 7, 2026245.65—
  • Lake Ontario at Oswego, NY (daily average)
Source: NOAA CO-OPS 9052030 · IGLD 1985

Lake Ontario in November in past years

Lake Ontario lake-wide average level in November by year
YearNovember average (ft)vs long-term
2026so far245.10+0.55
2025244.39−0.16
2024244.13−0.42
2023244.39−0.16
2022244.09−0.46
2021245.54+0.99
2020244.75+0.20
2019246.19+1.64
2018244.82+0.27
2017245.60+1.05
2016244.36−0.19

Lake-wide monthly means from NOAA GLERL. Long-term November average: 244.55 ft (1918 to last year).

Lake facts

NOAA gauge
Oswego, NY 9052030
Datum
IGLD 1985
Highest November (lake-wide)
246.65 ft1945
Lowest November (lake-wide)
241.96 ft1934
Highest monthly level
249.05 ftJun 2019
Lowest monthly level
241.93 ftDec 1934
Surface area
7,340 sq mi
Maximum depth
802 ft
Average depth
283 ft
Volume
393 cubic miles

Area, depth and volume: US EPA, The Great Lakes: An Environmental Atlas and Resource Book. Records: lake-wide monthly means since 1918 (NOAA GLERL).

Neighboring lakes

Quick answers

Is Lake Ontario high or low right now?
The lake-wide level on Nov 6, 2026 was 245.11 ft, 0.56 ft above the long-term November average of 244.55 ft (NOAA GLERL, 1918 to last year).
Why does the gauge differ from the lake-wide level?
Wind pushes water from one end of a Great Lake to the other, so a single gauge can read higher or lower than the lake average for hours. The lake-wide figure averages several gauges and changes slowly.
What is IGLD 1985?
The International Great Lakes Datum of 1985, the reference used for Great Lakes levels by the US and Canada instead of mean sea level.
How often is this page updated?
Several times a day with the latest reading of NOAA station 9052030. The lake-wide averages are updated by NOAA GLERL once a day.

Where this data comes from

Water level from NOAA station 9052030 (tidesandcurrents.noaa.gov), IGLD 1985. Lake-wide monthly means and records from NOAA GLERL. Recent readings are provisional.

Lake Levels Daily is an independent site, not affiliated with TWDB, LCRA, USACE, USGS, NOAA, TVA or any lake operator. Check official sources before making safety decisions.