Lay-by located on top of Bwlch mountain and frequented by local astronomical societies all of whom welcome public participation in their stargazing events.
Weather forecast
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02/09/26
18° 88% -
02/09/26
18° 83% -
02/09/26
17° 61% -
03/09/26
17° 89%
Weather forecast for Merthyr Tydfil (9.9 miles away) updated 02/09/26 at 06:01. Powered by Met Office data.
Local light pollution
Bwlch Mountain Lay-by is estimated to have light pollution levels similar to a 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.
Wed 2nd Sep
Thu 3rd Sep
Fri 4th Sep
Sat 5th Sep
Sun 6th Sep
Mon 7th Sep
Tue 8th 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
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