Tropical Places - Sodwana Bay
EKE
Would you believe I have 3299 (Maputo) and 3398 (Durban) right in front of me,
and the answer to your question is 166nms
and another 43nms to Stiknruda's Ponta de Ouro.
You will pass the Greater St. Lucia Wetland Park, check the local restrictions, don't go too near the (sea) water, that's a Marine Park
A question I want to ask you, how do you define Tropical? ,
is it palm trees and sandy beaches, or Latitude?
Sodwana is right on the 28th, and fits your requirement, yet Jo'burg is on the 26th, and is no way tropical, it's an oasis in an arid plain.
I might add that it is also my home, and I love it.
Of course, where I work is on the 2nd North, and thus Equatorial, you can't beat the palms and sandy beaches of Tioman and Pangkor Laut.
That's where I will be tomorrow,eat your heart out.
Good luck on your trip.
Sultan Ismail
BTW, I bought the maps last week at Avex Air and CFA, Grand Central