If you planning to travel to Ostional National Wildlife Refuge, Ostional, Costa Rica, 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 11:41 AM. The temperature feels like 81.85 with a humidity level of 83 so dress accordingly. Cloud coverage is 7 percent with visibility at 14.6 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling east-northeast at a speed of 4 MPH. At the end of the day don’t miss the sunset at 11:18 PM.