The Rebetiko Conference of Hydra as well as the regular rebetiko music evening organized by Ed Emery, SOAS Rebetiko BAND and the Institute of Rebetology will come to Hydra and present the Rebetiko music evening, which is the main event of the conference,  that is open to everyone. Admission is free but you will need to book a table for dinner at the Xeri Elia Taverna. Please contact Stavros Douskos asap to reserve a table early as this is a very popular event of music, singing and dancing!

Organised by the Greek Yachting Association, the October 2018 regatta closes the summer season. Participating yachts race from Piraeus and depending upon the weather, start coming into Hydra Harbour on the Friday night. There's a hospitality event for the yachtsmen followed by an award ceremony, before the yachts leave on the Sunday morning for the next leg of the race.

Ochi Day is a Greek National Holiday celebrating the Anniversary of the 'NO'. It is celebrated throughout Greece, Cyprus and the Greek communities around the world to commemorate the rejection by Greek Prime Minister Ioannis Metaxas (in power from August 4, 1936, until January 29, 1941) of the ultimatum made by Italian dictator Benito Mussolini on October 28, 1940, during World War II. On Hydra, there are church services and a parade along Hydra Harbour with all the children and students of Hydra taking part.

The celebration of Hydra's Patron Saint, Aghios Konstandinos, starts on the 13th. On the 14th the Doxology is sung in the subsequently formed 'Litaneftiki' procession which leaves the Church of Aghios Konstandinos at 10:30 and makes its way down the winding road from Kiaffa through the pine trees to Kala Pigadi and then down to the harbour following Andreas Miaoulia Street. Eventually the procession finishes with a blessing outside the port entrance to the Cathedral.

Team Swimming & Running sports event hosted on Hydra for the first time in 2018 with great success. A maximum of 50 pairs taking part in various locations around the island.
A SwimRun is a multiple-stage competition which involves a pair of athletes running and swimming tied together with a rope, over a cross-country race course or loop-course that involves at least 2 transitions (3 transitions in the case of Hydra and a total of 14,7km) between the swim (3,7k) and run (11k) stages of the race. Athletes may use special swimming equipment like wetsuits, paddles or pull buoys, except for floating aids (not provided by the organiser). They can also wear shoes during the running legs. However, each piece of equipment has to be carried throughout the race. The team of 2 must complete the race tied together with the rope which the organiser will provide. 

Assumption Day (Dormition of the Virgin Mary) is a Greek Orthodox Religious observation, which because it is of such significant importance to the Greeks, is also a National Bank Holiday allowing them to travel to be with family at this important occasion. This is a joyful celebration because it commemorates Mary's reunion with Jesus in heaven. On Hydra, the congregation of the island's main churches fast and celebrate mass for the week leading up to the 15th as well as observing mass after. The main focus of the week centres on the Monastery Church in the centre of Hydra Harbour which is dedicated to the Assumption of the Virgin Mary.