Lake Ontario General Facts

• Imperial
• Metric

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Lake Ontario
​By the Numbers

Elevation	243 ft
Surface Area	7,340 mi²
Drainage Area	24,720 mi²
Volume of Water	393 mi³
Avg Depth	283 ft
Max Depth	802 ft
Length (N-S)	53 mi
Length (E-W)	193 mi
Length of Shoreline	712 mi
Avg Surface Temp	48º F
Retention Time	6 years
Avg Outflow	243,000 ft³/s

Read more on the "Physical Features of the Great Lakes" from the EPA ​.

Lake Ontario
​By the Numbers

Elevation	74 m
Surface Area	18,960 km²
Drainage Area	64,030 km²
Volume of Water	1,640 km³
Avg Depth	86 m
Max Depth	244 m
Length (N-S)	85 km
Length (E-W)	311 km
Length of Shoreline	1,146 km
Avg Surface Temp	9º C
Retention Time	6 years
Avg Outflow	6,881 m³/s

Read more on the "Physical Features of the Great Lakes" from the EPA ​.

DESTINATIONS

Explore Great Lakes destinations on Lake Ontario

• Niagara on the Lake, Ontario Cruises
• Toronto, Ontario Cruises