You may want to start learning Swedish before you come to Sweden. The website of the Swedish institute is a good place to start looking for a school in your area:
Private schools and other institutions offer evening classes in several languages, including Swedish and English. If you’re an exchange student you should contact your international study advisors for more information. The following links will come in handy:
Svenska Nu offers special courses in the Swedish language for PhD students and researchers:
At SFI Swedish for immigrants schools (Svenska för Invandrare) you can get free Swedish lessons if you have a residence permit and a personal identity number:
If you require a TISUS certificate, the universally recognised Swedish language test, you should contact Stockholm University's Department for Scandinavian Languages:
The following pdf document, "Learn Swedish in Stockholm - prepare yourself for studies at the university level", provides information about Swedish language courses for academic purposes:
Update 15/05/2008
Babbel is an international success with millions of active subscribers and ranked as the world's #1 innovative company in education.
Learn and review on your own schedule: Mobile, tablet or desktop compatible, with lessons about 10-15 min.
Expert-made courses: Learn the basics or focus on topics like travel, culture, or business.
Start speaking right away: Learn to speak a new language naturally and conversationally.
Every learner is different: Each course is based on your native language and personal interests.
Remember everything: Babbel employs proven cognitive techniques that move new vocab to your long-term memory.
Refine your pronunciation: Practise speaking and improve your pronunciation with speech recognition technology.
Registration with Babbel is completely free of charge and the first lesson in every course is FREE to try (Depending on the language you choose, that's 30-80 free lessons!).
If you want full access to Babbel's courses, simply choose a subscription that works best for you. Buy with confidence: 20-day money back guarantee!