If you planning to travel to Siesta Key Marina, Siesta Key, Florida, 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 11:55 AM. The temperature feels like 69.15 with a humidity level of 67 so dress accordingly. Cloud coverage is 10 percent with visibility at 14 percent. Today’s UV index is 5, don’t forget the sunscreen if you need it! Today’s winds are traveling west at a speed of 19 MPH. At the end of the day don’t miss the sunset at 10:36 PM.