If you planning to travel to Castle Island, Boston, Massachusetts, 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 12:11 PM. The temperature feels like 23.450000000000003 with a humidity level of 69 so dress accordingly. Cloud coverage is 42 percent with visibility at 12.2 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling west-northwest at a speed of 10 MPH. At the end of the day don’t miss the sunset at 9:16 PM.