Summer months in the Persian Gulf hit 35C regularly, you get used to it 

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Yeah it's nutsSomeone was telling me about their trip off Qatar in 37C water, so it's moreorless impossible to cool down
The humidity is the worst part there. I hated it. I remember diving in the Gulf in Dubai during the summer, with the water in the 34- 35 °C range at 30 meters down. It was awful.Summer months in the Persian Gulf hit 35C regularly, you get used to it