The Great Lakes: An Ontario Guide
Four of the five Great Lakes border Ontario, together holding roughly a fifth of the world’s surface fresh water. From Superior’s wild cliffs to Erie’s warm, shallow shores, here’s what makes each of Ontario’s Great Lakes special — and how to explore them.
The Four Lakes All Lakes & FallsOntario & the Great Lakes
The Great Lakes — Superior, Michigan, Huron, Erie, and Ontario — form the largest group of freshwater lakes on Earth, holding roughly one-fifth of the world’s surface fresh water. Four of the five border Ontario; only Lake Michigan lies entirely within the United States. The province’s southern and northern edges are defined by these inland seas, and they’ve shaped its cities, industry, and outdoor life for centuries.
Each lake has its own character — from the cold, deep, wild expanse of Superior to the warm, shallow, beach-lined shores of Erie. A remembering trick for their layout is the acronym HOMES: Huron, Ontario, Michigan, Erie, Superior.
The Four Great Lakes on Ontario
Lake Superior
The largest freshwater lake in the world by surface area — cold, deep, and dramatic. Ontario’s northern shore is a wilderness of cliffs, waterfalls, and provincial parks, best explored on the Lake Superior Circle Tour. Swimming is bracing; scenery is unmatched.
Lake Huron
Home to Georgian Bay and its 30,000 Islands, plus Manitoulin — the world’s largest freshwater island. Famous for clear turquoise water, sandy beaches, and legendary sunsets along the “Blue Coast.” A cottage-country and paddling paradise.
Lake Erie
The shallowest and warmest of the Great Lakes, with the best swimming and long sandy beaches. Point Pelee National Park — mainland Canada’s southernmost point — is a world-class birding spot, and nearby Pelee Island has vineyards and quiet shores.
Lake Ontario
The province’s most populous shoreline, anchored by Toronto and stretching to Niagara and Prince Edward County. Waterfront trails, beaches, wine country, and big-city life all meet along its shores.
Where to Go
| For… | Lake / area | Why |
|---|---|---|
| Wild scenery & road trips | Lake Superior (Northern Ontario) | Cliffs, waterfalls, and the Circle Tour |
| Islands & clear water | Lake Huron / Georgian Bay | The 30,000 Islands and Manitoulin |
| Warm swimming & birding | Lake Erie (Southwestern Ontario) | Warm shallows, Point Pelee, Pelee Island |
| Cities, beaches & wine | Lake Ontario (GTA & Niagara) | Toronto waterfront, Niagara, the County |
| Lighthouses & sunsets | Lake Huron shoreline | The “Blue Coast” and its famous sunsets |
Plan Your Visit
Pick your lake by season: For warm swimming, head to Lake Erie or the shallow bays of Lake Huron in July and August. Lake Superior is best for scenery and road trips rather than swimming — even in summer, its water stays cold.
Respect the water: The Great Lakes act like inland seas, with strong currents, cold water, and weather that turns quickly. Rip currents are a genuine danger at some beaches — check flags and forecasts, and swim where it’s supervised when you can.
Beat the summer crowds: Popular beaches like those on Lake Huron and Lake Erie fill fast on hot weekends. Arrive early for parking, or visit in the shoulder seasons for a quieter shoreline.
Great Lakes FAQ
How many Great Lakes are there, and which border Ontario?
There are five Great Lakes: Superior, Michigan, Huron, Erie, and Ontario (remembered by the acronym HOMES). Four of them — Superior, Huron, Erie, and Ontario — border the province of Ontario. Lake Michigan is the only one lying entirely within the United States.
Which Great Lake is best for swimming?
Lake Erie is the shallowest and warmest of the Great Lakes, generally offering the best swimming. The sandy, shallow bays of Lake Huron are also excellent. Lake Superior, being deep and cold, stays chilly even in summer.
What is the largest Great Lake?
Lake Superior is the largest of the Great Lakes and the largest freshwater lake in the world by surface area. It’s also the deepest and coldest, with a wild, dramatic Ontario shoreline.
What is there to do on the Great Lakes in Ontario?
Plenty — scenic drives like the Lake Superior Circle Tour, swimming and beaches on Erie and Huron, sea kayaking Georgian Bay’s islands, visiting lighthouses and Manitoulin Island, birding at Point Pelee, and exploring waterfront cities and wine country along Lake Ontario.
Are the Great Lakes safe to swim in?
Generally yes, but they behave like inland seas. Cold water, sudden weather changes, and rip currents at some beaches are real hazards. Check conditions and warning flags, swim at supervised beaches when possible, and take currents seriously.