Open Water Data

St. Marys Quarry

Town of St. Marys, Ontario, Canada

  • E. coli
    PASS 10mpn (5 samples) Mon, Jul 8, 2024
  • Water Quality Status
    Passed tests Mon, Jul 8, 2024
  • Water Temperature
    21°C / 69.8°F (water) Mon, Jul 8, 2024
  • Air Temperature
    19.1°C / 66.4°F (air) Sun, Aug 10, 2025 at 6:00am
  • Wind
    11.9 - 24.9km/h SSE 155° Sun, Aug 10, 2025 at 6:00am
  • Partly cloudy
    Partly cloudy Sun, Aug 10, 2025 at 6:00am
  • Precipitation
    0mm Sun, Aug 10, 2025 at 6:00am
  • Air Visibility
    24km Sun, Aug 10, 2025 at 6:00am
  • Humidity
    100% Sun, Aug 10, 2025 at 6:00am

St. Marys Quarry was formerly a limestone Quarry that closed in 1920 and in the mid-1940s it was converted into a public swimming area! Since, it has become one of the more frequented swimming spots in the area to visit on hot summer days!

The description above was copied from or heavily based on Swim Guide, with permission.

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