Mosquitos can be fierce at times in Everglades National Park, especially during the summer rainy season. It's a good idea to carry an extra supply of your favorite repellant, and consider wearing lightweight, long-sleeve shirts and long pants.
Be sure to pack a lightweight rain suit or poncho. In spring, summer, and early fall, thunderstorms can seemingly appear out of nowhere, sweeping across the landscape and delivering a solid drenching to everything below.
Summer temperatures and humidity can reach extremes. Refreshments and drinking water are scarce within the park, but picnic sites are plentiful. A cooler with cold beverages, water, snacks, and a picnic lunch will come in very handy. The use of sunscreen and a wide-brimmed hat are also recommended.