The Castle Semple Visitor Centre located on the shores of Castle Semple Loch makes for a great out-of-town stargazing venue. With easy access from Glasgow however being distant enough to escape the bright city lochs it makes for an excellent location to see the stars. The venue regularly hosts stargazing events with assistance from astronomers from Coats Observatory.
Weather forecast
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21/06/26
21° 5% -
21/06/26
21° 4% -
21/06/26
20° 4% -
22/06/26
18° 5%
Weather forecast for Johnstone (5.0 miles away) updated 21/06/26 at 12:01. Powered by Met Office data.
Local light pollution
Castle Semple Visitor Centre is estimated to have light pollution levels similar to a semi-rural location based on the latest data from the VIIRS satellite. For more advanced light pollution data, view this location on DarkSkySites.
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Urban
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Suburban
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Semi-rural
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Rural
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Dark site
The above demonstrates the estimated effect of light pollution - graphics created using Stellarium.
Best time to visit
The below chart shows when the skies will be at their darkest at this location and therefore the best time to visit. Moonlight is shown in light yellow and the Sun's twilight in light blue. Midnight on the date shown is shown as a white line with sunset to the left and sunrise the next morning to the right. A black background with stars shows the best times for stargazing. See our dark sky calendar for more details.
Sun 21st Jun
Mon 22nd Jun
Tue 23rd Jun
Wed 24th Jun
Thu 25th Jun
Fri 26th Jun
Sat 27th Jun
Find more dates
If you are planning to visit this location check our dark sky calendar to find out when is best!
CalendarEvents nearby
Stay and gaze nearby
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