Stora Karlsö
Island Small Gotland island with seabird colonies and cliffs
Off Gotland’s west coast, Stora Karlsö is an island of limestone cliffs and seabird colonies; birdwatchers and day‑trip visitors hike marked trails to see guillemots, razorbills and springtime orchid blooms.
Stora Karlsö is a small limestone island off the coast of Gotland, Sweden, known for its seabird colonies and distinctive karst cliffs. It is one of Sweden’s notable offshore nature sites for breeding seabirds and specialized flora.
The island is visited for its seabird colonies, especially cliff-breeding species, and for walks among exposed limestone outcrops and sparse woodland. Seasonal boat trips from Gotland bring day visitors to viewing points and short guided trails around the island.
Stora Karlsö’s human use has been limited and largely seasonal, focused on fishing, birding and later nature conservation. Its natural features and bird colonies have attracted scientific interest and protected-status measures over time.
The island lies off the western coast of Gotland in the Baltic Sea, administratively part of Gotland County. Access is by boat from Gotland during the warmer months.
How to Get to Stora Karlsö #
Boat services to Stora Karlsö run seasonally from Gotland (usually from Klintehamn or sometimes from Visby). Crossing times and operators vary; journeys are short but weather-dependent. Expect a short landing and walking trails once ashore.
Tips for Visiting Stora Karlsö #
- Book the seasonal boat from Klintehamn or Hoburgen ahead of time - crossings are weather-dependent.
- Bring binoculars during late spring for the best seabird-watching (razorbills, guillemots, and kittiwakes).
- Follow marked trails and respect restricted nesting areas; parts of the island are protected during breeding season.
Best Time to Visit Stora Karlsö #
Best visited late spring to early summer for wildlife; island access is seasonal and weather-dependent.
Weather & Climate near Stora Karlsö #
Stora Karlsö's climate is classified as Oceanic - Oceanic climate with mild summers (peaking in August) and freezing winters (coldest in February). Temperatures range from -2°C to 20°C. Semi-arid with limited rainfall.
January
January is cold with highs of 3°C and lows of -1°C. Moderate rainfall (38 mm), mostly overcast skies, and breezy conditions.
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February
February is the coldest month with highs of 2°C and lows of -2°C. Moderate rainfall (30 mm), mostly overcast skies, and breezy conditions.
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March
March is cold with highs of 3°C and lows of -1°C. Moderate rainfall (33 mm), mostly overcast skies, and breezy conditions.
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April
April is cold with highs of 7°C and lows of 0°C. Light rainfall and partly cloudy skies.
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May
May is cold with highs of 13°C and lows of 5°C. The driest month with just 28 mm and partly cloudy skies.
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June
June is cool with highs of 17°C and lows of 9°C. Moderate rainfall (39 mm) and partly cloudy skies.
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July
July is cool with highs of 20°C and lows of 13°C. Moderate rainfall (46 mm) and partly cloudy skies.
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August
August is cool with highs of 20°C and lows of 13°C. Moderate rainfall (46 mm) and partly cloudy skies.
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September
September is cool with highs of 15°C and lows of 10°C. The wettest month with 54 mm of rain and partly cloudy skies.
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October
October is cold with highs of 11°C and lows of 6°C. Moderate rainfall (46 mm), mostly overcast skies, and breezy conditions.
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November
November is cold with highs of 6°C and lows of 3°C. The wettest month with 54 mm of rain, mostly overcast skies, and breezy conditions.
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December
December is cold with highs of 4°C and lows of 0°C. Moderate rainfall (49 mm), mostly overcast skies, and breezy conditions.
