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My paper is in the late stage of peer-review and probably will be accepted once I complete the last minor revisions, but it is not formally accepted yet. During peer-review the manuscript changed quite a lot because of the helpful comments by the reviewers.
The journal is not open access and therefore I want to upload the manuscript to a public repository like arxiv to make it more accessible. The last version of my manuscript that I plan to upload is probably close to the final published version once it is accepted.
The publisher of the journal is Wiley-Blackwell, according to the sherpa/romeo database it is in the yellow category: http://sherpa.ac.uk/romeo/search.php?id=2050&la=en&fIDnum=|&mode=simple&format=full
They allow pre-prints, but it says 'pre-refereeing', so I am not completely sure if it is allowed to upload a pre-print at this stage.