If you planning to travel to Lighthouse Beach, Port Lavaca, Texas, 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 12:45 PM. The temperature feels like 77.45 with a humidity level of 84 so dress accordingly. Cloud coverage is 24 percent with visibility at 9 percent. Today’s UV index is 5, don’t forget the sunscreen if you need it! Today’s winds are traveling east-southeast at a speed of 7 MPH. At the end of the day don’t miss the sunset at 11:33 PM.