If you planning to travel to Cayo Guillermo Marina, Cay Guillermo, Cuba, 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 10:52 AM. The temperature feels like 77.6 with a humidity level of 72 so dress accordingly. Cloud coverage is 3 percent with visibility at 14.8 percent. Today’s UV index is 11, don’t forget the sunscreen if you need it! Today’s winds are traveling east-northeast at a speed of 21 MPH. At the end of the day don’t miss the sunset at 11:38 PM.