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Photo: St. Mary's Lake University of Notre Dame Early Fall by Know1one1 (CC BY-SA 3.0) License

Saint Marys Lake

Lake · Notre Dame, Indiana

Comfortable for a swim today

Good to swim

Comfortable for a swim today: water temperature is 74°F, within the comfortable 70–86°F range.

  • Water temperature is 74°F, within the comfortable 70–86°F range.
Good to swimGreat conditions today

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Comfortable for a swim today

Good to swim

Comfortable for a swim today: water temperature is 74°F, within the comfortable 70–86°F range.

  • Water temperature is 74°F, within the comfortable 70–86°F range. NOAA buoy 45026, as of Aug 21, 8:50 PM UTC
Water temp
74°F
23°C

No official beach-advisory feed for Indiana yet — follow posted signs and local guidance.

Live data from NOAA buoy 45026 (27.2 mi away), as of Aug 21, 8:50 PM UTC.

Weather at Saint Marys Lake

H: 84° L: 62°
Overcast
Overcast
80°
|
Feels like 80°
Precipitation
9%
Humidity
45%
Wind
7 mph
UV Index
2
Water Conditions:
🏊Perfect for swimming
12 AM
Clear
66°
3 AM
Clear
63°
6 AM
Clear
62°
9 AM
Fog
63°
12 PM
Sunny
77°
3 PM
Overcast
81°
6 PM
Cloudy
77°
9 PM
Clear
72°

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Frequently asked questions

Where is Saint Marys Lake?
Saint Marys Lake is a lake in Notre Dame, Indiana.
What is the water temperature at Saint Marys Lake?
As of August 21, 2026, the water temperature at Saint Marys Lake in Notre Dame, Indiana is 74°F (23°C), measured by NOAA buoy 45026, 27.2 miles away.
Can you swim at Saint Marys Lake?
Comfortable for a swim today: water temperature is 74°F, within the comfortable 70–86°F range. Checked August 21, 2026.
How is Saint Marys Lake rated?
Saint Marys Lake in Notre Dame, Indiana has an average visitor rating of 4.9 out of 5, based on 7 reviews.

Visitor Reviews

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Best Times to Visit

Right Now
Perfect conditions right now!
🏞️ Lakes Tips:
  • Check for boat launch facilities and fees
  • Obtain required fishing licenses before arrival
  • Be aware of lake-specific regulations and restrictions
  • Monitor water quality reports before swimming
Best Seasons:
☀️ Summer (Jun-Aug)🍂 Fall (Sep-Nov)🌸 Spring (Mar-May)

Location & Contact

Notre Dame, IN 46556

Notre Dame, Indiana 46556

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