What is the current water level at Lake Ontario?

The current water level at Lake Ontario is 247.13 ft (updated 5 hours ago). See the live chart and daily history on this page for trends.

How often is Lake Ontario lake level data updated?

Readings are refreshed 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.

How does the current level compare to the long-term average at Lake Ontario?

Lake Ontario is currently +1.07 ft vs long-term average relative to its long-term average elevation on Lake Insights.

Lake Ontario

New York

Current level

247.13ft

+1.07 ft vs long-term average

24h change

−0.04 ft

vs prior daily summary

Trend

Falling

Share feedback or correction

Current level

247.13 ft

+1.07 ft vs long-term average

3.83 ft above chart datum (LWD)

Share feedback or correction

Since last reading

−0.04 ft

Yesterday

Jun 8

247.25ft

7-day change

−0.1 ft

Net change vs. reading nearest 7 days ago

8 daily readings in the last 7 days · Hover for date and level

30-day change

−0.15 ft

Net change vs. reading nearest 30 days ago

13 daily readings in the last 30 days · Hover for date and level

Lake level trend

Elevation (ft) IGLD 1985 · 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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· curated for Lake Ontario

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Level breakdown

Long-term avg: 246.06 ft
Chart datum (LWD): 243.3 ft
Current: 247.13 ft
Difference: 1.07 ft

DatumVertical reference for published pool and stage elevations at this lake (from the lake catalog).: IGLD 1985
Elevation reference: MSL
Source: NOAA / U.S. Army Corps of Engineers (coordinated network)

Level breakdown & datum

Long-term avg: 246.06 ft
Chart datum (LWD): 243.3 ft
Current: 247.13 ft
Difference: 1.07 ft

DatumVertical reference for published pool and stage elevations at this lake (from the lake catalog).: IGLD 1985
Elevation reference: MSL
Source: NOAA / U.S. Army Corps of Engineers (coordinated network)

Level thresholds

Published elevations from lake operators when provided by the data service.

Flood stageNot available
Full poolNot available
Winter poolNot available

Level thresholds

Published elevations from lake operators when provided by the data service.

Flood stageNot available
Full poolNot available
Winter poolNot available

Gear & Essentials

· curated for Lake Ontario

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7 & 30 day trends

7-day change

−0.1 ft

8 daily readings in the last 7 days · Hover for date and level

30-day change

−0.15 ft

13 daily readings in the last 30 days · Hover for date and level

Daily level summary

Jun 9, 2026
Falling
247.21 ft
-0.04 ft
Jun 8, 2026
Falling
247.25 ft
-0.02 ft
Jun 7, 2026
Falling
247.27 ft
-0.02 ft
Jun 6, 2026
Rising
247.29 ft
+0.02 ft
Jun 5, 2026
Stable
247.27 ft
-0.01 ft
Jun 4, 2026
Falling
247.28 ft
-0.02 ft
Jun 3, 2026
Stable
247.3 ft
-0.01 ft

Date	Level (ft)	Change (ft)	Condition
Jun 9, 2026	247.21	-0.04	Falling
Jun 8, 2026	247.25	-0.02	Falling
Jun 7, 2026	247.27	-0.02	Falling
Jun 6, 2026	247.29	+0.02	Rising
Jun 5, 2026	247.27	-0.01	Stable
Jun 4, 2026	247.28	-0.02	Falling
Jun 3, 2026	247.3	-0.01	Stable
Jun 2, 2026	247.31	-0.01	Stable
Jun 1, 2026	247.32	-0.03	Falling
May 31, 2026	247.35	-0.01	Falling
May 30, 2026	247.36	0	Stable
May 29, 2026	247.36	0	Stable
May 28, 2026	247.36	—	—

Lake Ontario water level — common questions

What is the current water level at Lake Ontario?: The current water level at Lake Ontario is 247.13 ft (updated 5 hours ago). See the live chart and daily history on this page for trends.
How often is Lake Ontario lake level data updated?: Readings are refreshed 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.
How does the current level compare to the long-term average at Lake Ontario?: Lake Ontario is currently +1.07 ft vs long-term average relative to its long-term average elevation on Lake Insights.

Lake level glossary

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

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Company & trust

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Company & trust

Lake Ontario

Lake level trend

Level breakdown

Level thresholds

Daily level summary

Lake Ontario water level — common questions

Lake level glossary