Michael am I missing something here? Are you spending a year in South Africa/Mauritius? If you are arriving in Cape Town in March (I think you said at the earliest) and spending a couple of months in South Africa, say April-May, you would be heading onward in the fall into winter, June/Julyish? It is early in the morning here and I may not have read your itinerary properly.
Finished the circumnavigation in early February in Grenada. Have to work on a book project for the next several months so the boat will be waiting for next year.