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 10:46 AM. The temperature feels like 80.5 with a humidity level of 91 so dress accordingly. Cloud coverage is 18 percent with visibility at 10.2 percent. Today’s UV index is 11, don’t forget the sunscreen if you need it! Today’s winds are traveling south-southeast at a speed of 7 MPH. At the end of the day don’t miss the sunset at 12:07 AM.