People come to Sweden for diving mainly for the outstanding wrecks we have in our archipelago. The Baltic Sea is brackish and has a very low oxygen level. Both is a good combo for preservation of 14-16 century ships. In addition, our more modern steel ship wrecks are very much more preserved in these conditions. The possibility to actually reach good wreck dive sites from land is a plus as well.

Recently the government in combination with the Swedish Maritime Museums decided to open up also traditionally off the limit wrecks to the public. These dives needs to be guided by specially trained dive guides and are only allowed using boat diving. A special permit is also required and is handled by the guide. Make sure to arrange all logistics in due time as the actual permit sometimes takes up to a week to get (government bureaucracy) 

The diving is cold water diving and a dry suit is recommended, mandatory almost for repeated dives. If you are not certified but well experienced in dry suit diving this is generally enough. Most dive operators are happy to suit you up if you can show logged proof of your dry suit experience. The diving is dark, already at 20m a dive light, a good one, is usually needed. The visibility is hard to predict and may vary from day to day with as much as 20-25 meters. Generally the vis is better during the colder period of the year. Marine life is scarce but still interesting. There is a lot of left over species from the ice age when the Baltic was a closed in lake. No big things except the odd seal that sometimes come by to check you out.

Climate

Winter may be anywhere from 10 to -30 °C. Fall is 10 to 20 °C, Summer 15 to 30 °C and fall 15 to 25 °C.

Marine Conservation

There are several protected marine areas scattered in Stockholm, usually it is restricted fishing and/or not allowed to anchor or stay nearby. Stockholm also have seal protection areas in the archipelago, mainly during the pupping season.