Abu Dhabi is located in The UAE in the Middle East. Guidance on how to dress varies a fair bit between countries in this part of the world.
For example, I found Oman and Jordan to be quite relaxed, while I’ve heard Saudi Arabia is a lot stricter.
Things also vary around the seven Emirates. For example, Dubai is very metropolitan and touristy, so you’ll see a lot more Western dress.
Meanwhile, the Emirati state of Sharjah was a lot more conservative.
You should, in my opinion, respect the local way of life and dress correctly there. It's unlikely that disrespectful clothing would ever have repercussions, so don't worry too much about getting a new outfit before your vacation.
Simply put, I believe it's critical to adjust to the culture you are visiting. If you're dressed a bit inappropriately, you'll probably get some strange looks, but nothing will be done about it.
What you plan to do in Abu Dhabi will determine a lot about what you dress. You will need to cover up if you plan to visit any mosques while traveling, such as the Sheikh Zayed Grand Mosque.
It's acceptable to wear swimwear or show a little more skin when you're inside a comfortable resort because the UAE has warm temperatures all year round.
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