Accufish ,

@Mr Kite flyer ,if I may respond on your behalf.
The prevailing winds there are pretty much the same as the KZN South-coast.i.e North Easterly and South westerly,with the odd South easter.From approximately late May untill early August you can expect off-shores being either West ,South West,or True/Straight-West ,or West ,North-West,.Depending on your location all of these are favourable.
Bear in mind that these winds will start at late afternoon as it gets dark and prevail throughout the night in varying degrees of moderation.(This happens because the land cools off much quicker than the ocean and the warmer air above the ocean rises ,and the "void" is filled with the air coming off the land),hence the off-shore wind. This may continue untill the following day untill such time that the Sun heats up the land again(which happens faster than the ocean) and the process is reversed,and so the wind direction.
Various other factors like Cold-fronts etc can disturb this ballance, but in general it holds true.Please if there are any Climatologists out there do not slay me, it is based on discussions with your peers,and observations over time and may I add a Laymans- opinion.
Depending on cloud cover the above process can occur as late as 10am-11am the following day,sometimes earlier ,sometimes later,but you will do yourself a favour if you started out at 05h00 on the morning of a daylight fishing stint.By that time it may still be dark outside in June-July,but should lighten up by 06h15.If you intend a night stint then launching your kite just before dark will stand you in good stead.Remember on the East coast it gets darker a lot sooner than the West-coast(sometimes to the extent that we could really have two time zones).
Do yourself a favour and avail yourself of the angles that kites can be tacked to,and how to use the prevailing wind.A search on the various Kite manufacturers's sites will pay off dividends.
Cheers