Awesome spot to view the stars and surrounding scenery, take a camera and tripod and have a go at some night-time photography! Photo used with kind permission from Paul Clark.
Weather forecast
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20/01/26
7° 85% -
20/01/26
7° 91% -
20/01/26
6° 85% -
21/01/26
5° 16%
Weather forecast for Rhayader (6.9 miles away) updated 19/01/26 at 12:01. Powered by Met Office data.
Local light pollution
Elan Valley - Claerwen Dam is estimated to have light pollution levels similar to a 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.
Tue 20th Jan
Wed 21st Jan
Thu 22nd Jan
Fri 23rd Jan
Sat 24th Jan
Sun 25th Jan
Mon 26th Jan
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.