Following is an extract from a set of passage notes covering the south Indian ocean which we are about to publish (see http://www.cruisingconnections.co.za
). It was created with the help of many many yachts that have transitted all routes in the Indian ocean. I quote:
"May to July are probably the best months to set sail from South Africa. It is a very controversial topic as to which coast in the Mozambique Channel to favour - both on the Mozambique side and the Madagascan coast (north of Tulear) have counter, northerly flowing currents of varying strengths with headlands mostly having current against one.
The "B.A Ocean Passages of the World" Sailing Routes suggests sailing east of Europa and either side of Juan de Nova. By using this route vessels will avoid the strongest part of the southwesterly current and will hopefully have a favourable wind until around half way up the channel.
The alternative would be to sail north on the Mozambique side and cross the channel at it's narrowest to Cap St Andre. Beware of the reefs and shallows off this point. Course can then be made to Nose Be and the northern tip of Madagascar, where a strong easterly current avails.
The sail to the Seychelles should be pleasant with light to moderate southeast trades. Plan to cross the Equator around 54ºE, from where a direct passage can be made to the Maldives or Sri Lanka. During the changes of the Monsoon in this area, a mostly east to northeast wind (with often squally weather), will assist you in reaching your destination
If I can help you with anymore information please do not hesitate to ask.
Wishing you fairwinds, and compliments of the season.