Set on the South shore of Grassholme Reservoir this location is accessible only when organised stargazing events take place.
Weather forecast
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16/09/25
12° 0% -
16/09/25
10° 1% -
17/09/25
10° 8% -
17/09/25
11° 88%
Weather forecast for Middleton-in-teesdale (2.0 miles away) updated 16/09/25 at 20:02.
Local light pollution
Grassholme Reservoir is estimated to have light pollution levels similar to a rural 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 16th Sep
Wed 17th Sep
Thu 18th Sep
Fri 19th Sep
Sat 20th Sep
Sun 21st Sep
Mon 22nd 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.