If you planning to travel to Carlstens Fastning, Marstrand, Sweden, here is your 6-day travel weather forecast to make sure you have all the essentials needed during your stay. Start your day when the sunrises at 3:52 AM. The temperature feels like 61.25 with a humidity level of 79 so dress accordingly. Cloud coverage is 72 percent with visibility at 10 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling southwest at a speed of 17 MPH. At the end of the day don’t miss the sunset at 6:36 PM.