This is a very popular lake in the Gwydir Forest above Betws y Coed. Location given special mention as a great stargazing location on Snowdonia National Park website.
Weather forecast
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04/07/25
12° 0% -
04/07/25
12° 0%
Weather forecast for Gwydyr Cycle Trail (2.0 miles away) updated 03/07/25 at 16:00.
Local light pollution
Llyn Geirionydd is estimated to have light pollution levels similar to adark site dark site location based on the latest data from the VIIRS satellite.
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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.
Thu 3rd Jul
Fri 4th Jul
Sat 5th Jul
Sun 6th Jul
Mon 7th Jul
Tue 8th Jul
Wed 9th Jul
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
Stay at one of these stargazing-friendly accommodation providers.