I was able to find weather maps going back a week in the region being searched. Conditions have been relatively benign, in 20-30 knot west to northwest winds most of the time. No info on the weather for 5-6 days before that. But in any case, the climate in that part of the southern ocean would normally produce air temperatures close to sea temperatures, in both cases around 10-15 C. It's not frigid at this time of year (assuming we're talking 45 S) but even as far north as Ile Amsterdam at 38 S which has weather records, March has average temperatures around 15-20 C daytime and 10-15 C nights. (keep in mind March in s.h. is like September in n.h. but when you compare Southern Indian Ocean to North Atlantic the latitude comparisons due to Antarctic circulation are something like 10 deg different, e.g., 40S = 50N, 45S = 55N. For northern readers, this ocean climate would be very similar to that encountered at the end of summer well off the coasts of Ireland or Scotland (or in the Gulf of Alaska).