When selecting wood for an outdoor bench that must withstand rainy weather, durability and natural resistance to moisture are paramount. The champion in this category is undoubtedly Teak. Its high natural oil content and tight grain make it incredibly resistant to water, rot, and insects. A teak bench can last for decades with minimal care, gracefully aging to a silvery-gray patina. While it's an investment, its longevity is unmatched.
A fantastic and aromatic alternative is Western Red Cedar. Its natural oils act as preservatives, granting it good resistance to decay, moisture, and insect damage. Cedar is lighter than teak and has a beautiful, rich color that can be left to weather or sealed with a protective finish.
For a budget-friendly yet durable option, Pressure-Treated Pine is a common choice. The treatment process forces preservatives deep into the wood, making it resistant to rot and insects. It requires sealing or painting for optimal longevity and to prevent warping or cracking over time.
Other excellent woods include White Oak (especially quartersawn), known for its water-resistant properties, and exotic hardwoods like Ipe and Cumaru, which are exceptionally dense and durable but can be harder to work with.
Regardless of your choice, proper construction (using stainless steel or galvanized hardware) and occasional maintenance like cleaning and applying a fresh sealant will significantly extend the life of your bench. The "best" wood balances your budget, desired aesthetic, and willingness for upkeep, ensuring your outdoor seating remains a welcoming retreat for years, rain or shine.