Beach vacations often come with unpredictable weather, so it's important to pack items that can handle both sun and rain. A waterproof rain and sun hat is a great addition to your bag, offering protection from UV rays and unexpected showers. Look for hats with adjustable straps to ensure they stay secure in windy conditions. Quick-drying towels are another must-have, as they are lightweight, compact, and perfect for drying off after a swim or sitting on sandy surfaces.