Kastelholm Castle
Sund, Åland
Kastelholm Castle is a 14th-century site located in Sund, Åland. It functions as a museum and is part of the Åland Museum. It ranks as the second most looked-up sight in the country on English Wikipedia.
Planning a visit
The castle is open to visitors from May 2 until September 30, with daily operating hours from 10:00 to 17:00. The site remains closed outside of these dates. During the open season, average temperatures range from 7 °C in May to 16 °C in July and August. Rain is common, occurring on approximately 6 days in June and up to 12 days in August. Wheelchair access is not provided at this facility.
Travelers can reach the site by arriving at Mariehamn Airport, which is 16 km away. The castle is located 17 km from the capital city of Mariehamn. Nearby attractions include the Åland Maritime Museum and the museum ship Pommern, both 17.4 km from the castle. For those interested in natural landscapes, the Archipelago Sea is located 47.1 km away.
Weather by month
The warmest month is July, averaging 16 °C. The wettest is August, with about 75 mm of rain.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average temperature, °C | -1 | -3 | -1 | 3 | 7 | 12 | 16 | 16 | 12 | 8 | 4 | 1 |
| Rainfall, mm | 47 | 30 | 30 | 27 | 35 | 50 | 50 | 75 | 56 | 67 | 67 | 56 |
| Rainy days | 13 | 10 | 10 | 7 | 6 | 6 | 11 | 12 | 10 | 12 | 13 | 15 |
Temperatures and rainfall: 1981–2010 averages for this spot (4 km grid), from CHELSA. Rainy days: 2015–2024, NASA POWER.
