Kalymnos Mostly Sport climbing 3,838 routes in crag

The world's current most popular sport climbing holiday destination.

Picking when to go depends on many factors. The winter months (December - March) enjoy very mild temperatures (average maximum of 14-16C) but this is the wet season and it will usually rain on 9-13 days per month. Locals rave about climbing on nice winter days though, if your schedule allows for sitting out a few winter storms, and the fact that all the shops will be shut. Later in the wet season, seepage can be heavy and this prevents climbing on most flowstone routes (which many people consider to be the best routes), and this is a significant factor during the months of January-March, and also April if rainfall was above average. If you want to swim, the water is too cold (<19C) during the months of November to April. By May the seepage should be mostly gone, and swimming should be ok, but the average maximum temperature is up to 24C and the sun is nearly at its hottest which can enforce shade chasing, and the crowds are sizable (albeit half those in October). Then summer hits, and the average maximum temperature is over 28C during the months of June - September, which for most people rules out a dedicated climbing holiday, but is reportedly a great time if you are happy to climb early, and to mix in some swimming and sailing which are at their best. September - November has good air temps, mostly good water temps, and no seepage, but this is offset by having by far the biggest crowds and queues at the crags.

A great intro on climbing on Kalymnos can be found on Lydiascapes.