This paper estimates future changes in LST and WBT in Arabian Peninsula during summer, relevant for heat stress.

The authors use ERA 5 and one ESM model do evaluate present climate and future climate changes for SSP2-4.5 and SSP5-8.5 IPCC scenarios.

The main objectives are clearly stated and the added value of the paper is stated.

The review of literature is very extensive and recent.

The theory that support the study is described in detail.

The data and the methods are clearly described.

The results are presented and are adequately summarized in the conclusions.

The article is well structured and written.

This paper should may be considered for publication but I have the following major concerns this happens:

1. The use of only one ESM to estimate climate change. The authors should either justify this or use more models to consider uncertainty of projections.
2. Section 3 deals with present climate (2008-2020) using IASI for LST and ERA 5 for WBT. Here present climate is characterized but there is no connection with results presented in Section 4.
3. In Section 4 the the EC-Earth model is used to estimate changes for two future periods and two future scenarios.
4. The performance of this model is not evaluated for the present climate, for example, by comparison with IASI and ERA 5. Therefore, even if the delta method has been used (future minus present) for EC-Earth, biases may still exist. Prior comparison between EC-Earth and IASI and ERA is needed.
5. The authors don’t mention, but is implicitly assumed that they apply the delta method whereby the future changes obtained by the EC-Earth model are to be added to IASI/ERA present climate to infer future LST and WBT.

The authors have satisfactorily addressed the issues raised by the reviewers