The turquoise colour of the water comes from rock flour carried into the lake by melt-water from the glaciers that overlook the lake.
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As glacial meltwater carries sediments, it creates a suspension in the water, scattering light and causing it to appear blue. The combination of glacial milk and the reflective properties of the suspended rock flour particles results in lakes such as Lake Moraine and Lake Louise exibiting breathtaking shades of blue.
Fine rock dust, produced by massive glaciers rubbing against bedrock, stays suspended in the water, reflecting light and creating the turquoise colours that Moraine Lake and Lake Louise are known for.
Since the lake is fed by Glacial melt, its water level and color change based on temperatures. To ensure warmer weather and an excellent chance to witness the most vivid turquoise water, the best time to visit Lake Louise is in July and August.
Thanks to the glacial melt, the water is either frozen or freezing at all times. In fact, most lakes in the region are glacial-fed, and the rivers are equally as frosty.
The water temperature rarely gets above 4°C, meaning you only have about 15 minutes or so until you become hypothermic. So the question should be, “Can you take a dip in Lake Louise?” Which absolutely you can if you feel like icing those bones!
The water color is greenish blue or turquoise similar to that of Emerald Lake in Yoho National Park of British Columbia. Like the other famous lakes in Canadian Rockies, the water of Peyto Lake is mainly from the melted ice/snow of the Peyto Glacial plus the water fed by the Peyto Creek from Caldron Lake.
To ensure warmer weather and an excellent chance to witness the most vivid turquoise water, the best time to visit Lake Louise is in July and August. That being said, the color never leaves, and you can witness the lake thawed until late October/early November when the lake freezes over.
From the vivid turquoise waters to the soaring peaks encircling the lake, Lake Louise is a stunning mountain setting. Fellow adventurers soak in the views from the shore, and bright red canoes float on the glacial waters. It's hard to resist dipping a hand into the water just to see if it's actually real.
Moraine Lake is only half the size of its nearby neighbour Lake Louise, but perhaps even more scenic. It's situated at an elevation of 1883 meters in the beautiful Valley Of The Ten Peaks in Banff National Park. This glacier-fed lake becomes the most intense and vivid shade of turquoise blue.
Lake Louise is a glacial lake within Banff National Park in Alberta, Canada. Situated 11 km east of the border with British Columbia, Lake Louise is located 5 km west of the hamlet of Lake Louise and the Trans-Canada Highway.
In a nutshell you are going to want to time your visit between late June and early to mid-September. Lake Louise doesn't usually thaw until early June, the canoe rentals start once it's clear of ice. Moraine Lake is a bit later around mid-June.
Lake Louise and Moraine Lake usually melt by late May. Alpine hiking season begins in late June. Ski season begins in mid-November. Locals know that Lake Louise and Moraine Lake are only the beginning!
Two of the most popular lakes in Banff National Park are Moraine Lake and Lake Louise, and everyone always wonders if you can swim in these two lakes! The most basic answer is yes, you can swim in Moraine Lake and Lake Louise. However, they are glacially fed and they are freezing!!
The park's glacier-fed lakes provide spectacular photo opportunities, but most are much too cold for swimming. There are, however, a variety of public swimming facilities throughout the national park.