I recently paddled with my two sons around the Whitsunday Islands, which are off the Queensland coast in Australia. WE did about 90 kilometers over 5 days: neither too little or too much. Longer would have been better, but time is always a constraint. As a sea kayaking location, it is paradise. Warm, but not hot temperatures, blue water, great campsites, everchanging dramatic scenery, coral reefs, and an array of wildlife such as mantas, a dugong, big turtles and so on. I was very proud of how both of my guys went. On one day we had a consistent 15-25 knot wind right in our faces, and they paddled into all day with effort but without complaint. Its one of those trips that I don't know that I will repeat as I cant see it going as well, or meaning as much to me, as did this one. The picture is of Hill Inlet, on the northern end of Whitehaven Beach. There is no trick to the photo, a long stretch of coast looks just like this.
(I hope that the link works, this is my 1st try)