Scuba diving in Uruguay is seasonal and strongly influenced by temperate Atlantic conditions. While diving is possible throughout much of the year, the most favorable period typically falls during the austral summer months.
Water temperatures vary significantly by season. During summer, from December through March, temperatures generally range from 18 to 22°C (64 to 72°F). In winter, from June through September, water temperatures can drop to approximately 14 to 17°C (57 to 63°F). As a result, thicker wetsuits of 5mm to 7mm are commonly required outside peak summer.
The summer months offer comparatively calmer seas, improved visibility, and more stable weather patterns. Visibility during this period may range from 5 to 15 meters (16 to 50 feet), though conditions can fluctuate depending on currents and freshwater influence from the Río de la Plata.
During autumn and winter, stronger winds and cooler temperatures can reduce visibility and increase surface movement. Diving activity decreases during these months, and some operators may run on limited schedules.
Unlike tropical destinations, Uruguay’s marine life does not depend heavily on seasonal migrations, so dive timing is primarily based on water temperature and sea conditions rather than wildlife events.
Overall, the best time to dive in Uruguay is during the austral summer, particularly from December through March, when water temperatures and surface conditions are at their most favorable.
