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Photo: Lower Saint Mary Lake MT1 by Acroterion (CC BY-SA 4.0) License

Saint Marys Lake

Lake

Comfortable for a swim today

Good to swim

Comfortable for a swim today: water temperature is 85°F, within the comfortable 70–86°F range.

  • Water temperature is 85°F, within the comfortable 70–86°F range.
Good to swimGreat conditions today

Comfortable for a swim today

Good to swim

Comfortable for a swim today: water temperature is 85°F, within the comfortable 70–86°F range.

  • Water temperature is 85°F, within the comfortable 70–86°F range. NOAA buoy SLIM2, as of Aug 21, 7:00 PM UTC
Water temp
85°F
30°C

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

Live data from NOAA buoy SLIM2 (6.8 mi away), as of Aug 21, 7:00 PM UTC.

Weather at Saint Marys Lake

H: 83° L: 66°
Sunny
Sunny
83°
|
Feels like 85°
Precipitation
71%
Humidity
55%
Wind
5 mph
UV Index
2.7
Water Conditions:
🏊Perfect for swimming
12 AM
Clear
72°
3 AM
Clear
69°
6 AM
Overcast
68°
9 AM
Sunny
70°
12 PM
Sunny
78°
3 PM
Sunny
83°
6 PM
Patchy rain nearby
78°
9 PM
Patchy rain nearby
74°

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Frequently asked questions

Where is Saint Marys Lake?
Saint Marys Lake is a lake in Maryland.
What is the water temperature at Saint Marys Lake?
As of August 21, 2026, the water temperature at Saint Marys Lake in Maryland is 85°F (30°C), measured by NOAA buoy SLIM2, 6.8 miles away.
Can you swim at Saint Marys Lake?
Comfortable for a swim today: water temperature is 85°F, within the comfortable 70–86°F range. Checked August 21, 2026.
How is Saint Marys Lake rated?
Saint Marys Lake in Maryland has an average visitor rating of 4.9 out of 5, based on 8 reviews.

Visitor Reviews

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Best Times to Visit

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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

Maryland

Maryland None

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