Diving Conditions

👉 High season: 🌹 Spring and 🍁 Autumn, from April to June and September to November The best windows for cave diving in the Lot. Water levels are typically stable and within range, visibility is good to excellent (often 15-20 m+), and outdoor temperatures make post-dive life pleasant. This is also the peak training season, with high traffic in the main caves. ☀️ Low season: Summer in July / August Low-water period. The heat and near-absence of rain often deliver excellent visibility, particularly in August, in the large systems such as Ressel, Cabouy, Landenouse or Saint-Georges. Visibility of 15 to 30 m is common at this time. On the other hand, smaller systems run very dry, with very low levels and significant inter-siphon portages. Because of daytime heat, it's best to plan very early dives and keep the afternoons for cooler activities. ❄️ Low season: Winter from December to March The wet and flood season. Resurgences can be in flood with very strong flow making diving impossible or dangerous in the largest systems, and visibility can drop drastically. Some sites become inaccessible (flooded tracks and roads, overflowing pools, extreme outflow currents). That said, this is also when exploring smaller systems shines, with moderate flow and rising water levels that shorten portages. On the flip side, in dry spells, calm winter days can deliver exceptional conditions with crystal-clear water and zero crowds. Keep an eye on the forecast and stay on the starting blocks! 🌡️ Water temperature Resurgence water temperature stays fairly constant year-round: around 12-14 °C. Plan on a drysuit for thermal protection and buoyancy redundancy.