Ontario is home to the 'world's bluest lake' and it's a dreamy spot to spend the summer

It's got beaches, small towns and gorgeous waters. 🌊✨

​A person sits by a lake in Ontario. Right: People are seen on the sand at a beach with blue water.

A person by a lake in Ontario. Right: A beach in Ontario.

Writer

If your idea of the perfect summer is days spent lounging by blue waters, look no further than this beautiful lake in Canada.

An Ontario lake was found to be the world's bluest lake, with gorgeous shimmering waters that you'll want to take a dip in this summer.

Online casino guide CanadaCasino conducted a colour analysis of over 80 popular lakes around the world, comparing them to YinMn Blue, the "truest shade of blue known."

In an email shared with Narcity, the company revealed that three of the world's bluest lakes can be found right here in Canada.

According to the study, Lake Ontario is the bluest lake in the world, with the smallest difference in colour from YinMn Blue out of any other lake analyzed.

The colour difference was measured using a DeltaE scale, where the smaller the number, the closer the lake's color is to true blue, with Lake Ontario having a difference of only 5.32.

The lake, on which you'll find cities including Toronto, Mississauga, Hamilton, Oakville and Kingston, may not be the first that comes to mind when you think of summer escapes. However, you'll find that there are plenty of pleasant beaches on its shores, like Sandbanks, a gorgeous white-sand beach with rolling dunes.

There are also many charming small towns on the lake, like the aptly named Niagara-on-the-Lake and the quaint communities of Prince Edward County that are perfect for summer getaways.

Right behind Lake Ontario, Lake Superior was found to be the second bluest lake in the world. Located in northern Ontario, here, you'll find a number of outdoor adventures in parks like Sleeping Giant Provincial Park, Pukaskwa National Park, and Lake Superior Provincial Park.

Following Lake Superior, Lake Huron was found to have the third closest match to YinMn Blue.

On Lake Huron, you'll find coastal gems like the town of Tobermory, home of the famous grotto swimming hole, as well as some of Ontario's best beaches like Wasaga Beach, Sauble Beach and Grand Bend.

The bluest lakes in Canada

Here are the top 10 bluest lakes in Canada, according to the study:

  1. Lake Ontario
  2. Lake Superior
  3. Lake Huron
  4. Moraine Lake
  5. Abraham Lake
  6. Kluane Lake
  7. Peyto Lake
  8. Joffre Lake
  9. Bow Lake
  10. Maligne Lake

While these are the bluest lakes in Canada, they're not necessarily going to be the warmest — if you're looking for warm-water swimming spots to visit this summer, you can check out one of the warmest beaches in Canada where you'll feel like you're floating in tropical water.

Before you get going, check out our Responsible Travel Guide so you can be informed, be safe, be smart, and most of all, be respectful on your adventure.

  • Contributing Writer

    Katherine Caspersz (she/her) is a contributing writer for Narcity Media, covering travel, things to do and more. She has written for various news sites and magazines, including Yahoo Canada and The National Post, and worked as an editor for the Toronto Star and The Globe and Mail. She loves shopping, travel and all things spooky.

This little-known Canadian passport rule could ruin your 2026 travel plans

You might get refused entry, if you don't check this. 👇✈️

19 products at Costco that are worth buying even if you live alone

Both name-brand and Kirkland Signature items get you a lot of bang for your buck. 🛒

'Big daddy' Mark Carney has gone viral worldwide after doing the Heated Rivalry 'leg thing'

It's raised questions about Canada's level of "media training." 💀

Ontario is home to a mini Grand Canyon and it's a breathtaking spot to explore

You don't need to travel to Arizona for stunning canyon views.