When night falls over La Parguera Bioluminescent Bay in Puerto Rico, the water springs to life, glowing with neon blue sparks that track your every move. Experiencing this natural wonder means you’ll be swimming in warm, salt-tinged water under a sky heavy with stars, but comfort starts long before you slip into the bay. Choosing what to wear is essential for both enjoying the bioluminescent glow and staying practical in this tropical, sometimes humid environment.

Dress for wet and warm conditions that can shift suddenly—lightweight swimwear is a must, but think beyond just a swimsuit. A quick-dry rash guard offers a layer of protection against irritation from saltwater and tidal grasses that dare to brush your arms. It also guards against the occasional sea breeze that pushes through, cooling skin that’s been submerged.

Footwear often gets overlooked but is paramount. The bay floor can be uneven, dotted with hidden rocks and patches of seagrass that twist beneath your feet like quiet challengers. Water shoes with sturdy soles shield your feet while still allowing you to feel connected to the water's pulse. They also make navigating the shoreline easier, where sand gives way to shells and stones.

Consider the temperature shifts after dark. Lightweight, breathable cover-ups like a loose towel wrap or thin, moisture-wicking shorts provide coverage without trapping heat. A zip-up hoodie or windbreaker packed in a dry bag can come in handy for the return trip when the air cools, especially if you’re doing a late-night paddle or kayak before the swim.

Accessories? Minimal and functional. Waterproof headlamps or glow sticks add safety without disrupting the bay’s fragile bioluminescence. Leave jewelry at home—metals can reflect unwanted light and get lost in the dark water. A snug swim cap keeps hair manageable and reduces drag. Even a bandana or headband will hold back wet strands that might impede your view.

Finally, pack your gear in a waterproof dry bag that can bravely hold your phone, keys, and any extra clothes, defying splashes and waves. Preparation for the unpredictable rhythm of this bay means interaction with the elements is less about battling them and more about flowing with a living ecosystem fiercely itself.

The bioluminescence invites you to move through the water with awe, stay light, stay agile, and wear comfort like a second skin. With the right gear, your evening swim transcends adventure—it becomes a seamless dialogue between swimmer and sea, lit by tiny stars summoned from below.