Open Water Data

  • E. coli
    PASS 68mpn Mon, Sep 1, 2025
  • Water Quality Status
    Passed tests Wed, Sep 3, 2025 at 5:46am
  • Water Temperature
    15°C / 59°F (water) Mon, Sep 1, 2025
  • Air Temperature
    11.3°C / 52.3°F (air) Mon, May 18, 2026 at 7:00am
  • Wind
    5.8 - 12.1km/h ESE 102° Mon, May 18, 2026 at 7:00am
  • Mist
    Mist Mon, May 18, 2026 at 7:00am
  • Precipitation
    0mm Mon, May 18, 2026 at 7:00am
  • Air Visibility
    4.8km Mon, May 18, 2026 at 7:00am
  • Humidity
    100% Mon, May 18, 2026 at 7:00am
  • Turbidity
    0.6NTU Mon, Sep 1, 2025
  • Clarity
    None Mon, Sep 8, 2025

Opened in the roaring 1920s, Sunnyside Beach was the place Torontonians came to play for decades.  This waterfront icon played host to bathers, concerts, tightrope-walkers and even an amusement park.  The Palais Royale was one of Toronto’s most popular dance halls, featuring jazz greats like Duke Ellington and Count Basie. In 1954, sixteen-year old Marilyn Bell ended her historic first swim across Lake Ontario nearby.  Not long after that, the Gardiner Expressway went up and the amusement park came down.  Today, you can still use the Sunnyside Bathing Pavilion and swim in the pool (aka, “The Tank”), have drinks and a bite to eat on a patio overlooking the beach, and of course, have a splash in Lake Ontario.

Sunnyside Beach is one of two pilot and assessment locations for the City of Toronto’s Artificial Intelligence Predictive Modeling (AIPM) of bacterial levels.

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

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