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 11:43 AM. The temperature feels like 79.1 with a humidity level of 84 so dress accordingly. Cloud coverage is 9 percent with visibility at 14.9 percent. Today’s UV index is 6, don’t forget the sunscreen if you need it! Today’s winds are traveling east at a speed of 12 MPH. At the end of the day don’t miss the sunset at 10:31 PM.