I have read in a travel site that there are 200 islands exist in
Abu Dhabi and that's all located along its coast. Many Isands access may be limited but you can visit Lulu, Saadiyat, Al Futaisi, Yas Island and Dalma Islands at any time.
Lulu Island is a perfect spot for short weekend trips and you can enjoy the beaches and cafeterias on the island. Saadiyat is a luxury leisure destination whicah has wonderful world-class entertainment centres, resorts and museums. Al Futaisi is a bird spotter’s paradise and it's located within five kilometres of Abu Dhabi city. This island offers a range of activities such camel riding, horse riding and you can explore Al Futaisi by bus and bycycle as well.
Yas Island is
UAE's popular spot for sports and leisure centre. It has many
attractions including Ferrari Theme Park, water park, a Formula One circuit and equestrian centre. Dalma Island has archaeological museum, agricultural research centre and many
things to do.
The Abu Dhabi has a sub-tropical
weather and the months between November and April are the most ideal months to visit these islands. Just tell your friend to visit
Palm Island Dubai as well if he gets time, it's also a fabulous place. convey my regards to your friend!