Lake Ontario lake and shoreline

Lake Ontario Water Level

New York

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Lake Ontario

Lake Ontario is currently 0.5 feet below its long-term average, with a water-surface elevation of 245.6 feet.

245.56 ft · Updated 3 hours ago · NOAA / U.S. Army Corps of Engineers (coordinated network)

Current level

245.56ft

−0.50 ft vs long-term average

2.26 ft above chart datum (LWD)

Status unavailable

Vs long-term average

Since last reading

Down 0.08 ft

Previous readingOct 8245.64 ft

7-day change

Down 0.23 ft

7-day trend: Falling

8 daily readings in the last 7 days

30-day change

Down 1.11 ft

30 daily readings in the last 30 days

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Water Level History

Current
245.56 ft
24h
-0.08 ft
7d
-0.23 ft
30d
-1.11 ft

Elevation (ft) IGLD85 · MSL

Reference line shows the annual long-term average (IGLD 1985). Near-real-time level is a Cleveland + Toledo gauge average — lake-wide coordinated means can differ slightly.

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Lake Level Context

Level remains below the long-term average

Lake Ontario is currently 245.56 ft, 0.50 ft below its long-term average. The lake has fallen 0.23 ft over the past 7 days and 1.11 ft over the past 30 days.

Lake Ontario Level Details

Reference elevations, recent daily readings, data sources, and answers to common questions.

Conditions & Reference

Level status

−0.50 ft vs long-term average

Current level
245.56 ft
Long-term avg
246.06 ft
Chart datum (LWD)
243.3 ft
DatumVertical reference for published pool and stage elevations at this lake (from the lake catalog).
IGLD85
Elevation reference
MSL
Source
NOAA

Reference levels

No published reference elevations for this lake.

Daily level summary

DateLevelChange
Oct 9, 2026245.56-0.08
Oct 8, 2026245.64-0.04
Oct 7, 2026245.68+0.05
Oct 6, 2026245.63-0.07
Oct 5, 2026245.7-0.09
Oct 4, 2026245.79+0.08
Oct 3, 2026245.71-0.08

Common questions about Lake Ontario’s water level

  • The current water level at Lake Ontario is 245.56 ft (updated 3 hours ago). You can track the Lake Ontario lake level on the interactive chart and daily history above.

  • The current 7-day trend for the Lake Ontario lake level is falling — falling about 0.23 ft over the past week. See the history chart above for the full picture.

  • Based on the latest reading, Lake Ontario is currently 0.50 ft below long-term average elevation on Lake Insights.

  • Readings refresh when NOAA / U.S. Army Corps of Engineers (coordinated network) publishes new gauge data — typically daily for most reservoirs. The timestamp above the chart shows when the latest observation arrived on Lake Insights.

Lake level glossary

Definitions for pool targets, datums, and how elevation readings are labeled.

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