That's an excellent and very practical question! The answer is: it depends entirely on the specific bench model. Many modern outdoor benches are designed with comfort and versatility in mind and do feature adjustable backs. You'll often find a simple locking mechanism, usually a pin or lever on the sides, that allows you to shift the backrest between two or three pre-set angles—from upright for dining to a more relaxed position for lounging.
However, a large number of traditional outdoor benches, particularly those made from solid wood or wrought iron, have fixed backs. Their design prioritizes durability and classic aesthetics over adjustability. The angle is permanently set, often for a more upright posture.
If a reclined angle is important to you, your best bet is to specifically look for "adjustable," "reclining," or "multi-position" outdoor benches. Check the product descriptions and specifications carefully before purchasing. For an existing fixed bench, modification is generally not recommended as it can compromise structural integrity. Instead, consider adding thick, supportive outdoor cushions to create a more relaxed feel. Ultimately, whether you can kick back and recline comes down to choosing the right bench for your relaxation needs.