Sandsfoot Castle is a former fort constructed by Henry VIII to keep Portland Harbour safe and give protection from French invaders. It’s location on the South Coast overlooking the bay of Weymouth makes for a good stargazing location and frequently hosts public stargazing events organised with the help of Weymouth Astronomy Club.
Weather forecast
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15/05/25
14° 0% -
15/05/25
13° 4% -
16/05/25
13° 0% -
16/05/25
10° 0%
Weather forecast for Portland Harbour - Castle Cove (beach) (0.1 miles away) updated 15/05/25 at 20:02.
Local light pollution
Sandsfoot Castle is estimated to have light pollution levels similar to asuburban suburban 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 15th May
Fri 16th May
Sat 17th May
Sun 18th May
Mon 19th May
Tue 20th May
Wed 21st May
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.