Viewing Conditions

Photo of Horsehead Nebula taken with DTAO Telescope

    See the universe from one of the largest telescopes in Central Canada!

    Join us for a Star Walk Experience! Even if it is a cloudy night, our extensive catalogue of images can take you through a virtual tour of the night sky!

    Evaluate the night sky over Fort William Historical Park!

    Check-out the Thunder Bay Clear Sky Chart below to help you determine sky conditions. It’s the astronomer’s forecast. At a glance, it shows when it will be cloudy or clear for up to the next two days. It’s a prediction of when Thunder Bay will have good weather for astronomical observing at the David Thompson Astronomical Observatory.

    Thunder Bay Clear Skies Chart

    If the chart is not displaying today's date you may have to clear your cache. To do so please hold down the "Ctrl" key while refreshing the page. Learn more about how to use the clear sky chart here.