Llyn y Dywarchen is located above the village of Drws y Coed in Dyffryn Nantlle, near Rhyd Ddu. It is a very popular fishing lake, and has a car park nearby. Location given special mention as a great stargazing location on Snowdonia National Park website.
Weather forecast
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14/09/26
17° 11% -
14/09/26
17° 61% -
14/09/26
16° 93% -
15/09/26
16° 97%
Weather forecast for Blaenau Ffestiniog (9.6 miles away) updated 14/09/26 at 06:01. Powered by Met Office data.
Local light pollution
Llyn y Dywarchen is estimated to have light pollution levels similar to a dark site 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.
Mon 14th Sep
Tue 15th Sep
Wed 16th Sep
Thu 17th Sep
Fri 18th Sep
Sat 19th Sep
Sun 20th Sep
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.