No, gorillas cannot swim naturally. Like most great apes, gorillas lack the instinctive ability to swim and generally avoid deep water. They have a natural fear of drowning and rarely enter water deeper than their chest. Unlike some primates that enjoy splashing or wading, gorillas stay on dry land or shallow water to keep their massive bodies safe and stable.

Several factors explain their inability and aversion to swimming:
Gorillas have dense muscle mass and low body fat, which makes them less buoyant. Unlike humans, who can float more easily due to body fat distribution, gorillas tend to sink if fully submerged.
Gorillas live in forested mountain or lowland environments with limited access to deep water bodies. Because they don’t grow up near water, they don’t develop swimming behavior through play or necessity.
Their evolutionary history has given gorillas a natural aversion to water. Deep water poses a drowning risk, especially since they don’t instinctively hold their breath or paddle like aquatic mammals or some monkeys.
Yes—but cautiously.
Gorillas may wade through shallow streams or puddles, especially during food searches or while crossing terrain. In such cases, they walk on two legs to keep their arms and chest dry.
There are rare instances in captivity where gorillas have been seen interacting with water more confidently, especially if they were introduced to it gradually. However, there are no reliable reports of wild gorillas swimming voluntarily.
Gorillas are used to rain in their tropical habitats and will sit through it without much concern. Their thick fur repels water, and they often seek natural shelter under vegetation. However, they still avoid puddles and flowing streams when possible, especially if it requires full-body exposure.
Swimming varies widely among great apes:
Gorillas do not swim, and they instinctively avoid deep water due to their physical makeup and lack of exposure. While they may wade through shallow streams when necessary, full swimming is not part of their natural behavior. Understanding this aspect of gorilla biology helps researchers and tourists better interpret their movements and habitats in the wild.