Will women soon outperform men in open-water ultra-distance swimming in the ‘Maratona del Golfo Capri-Napoli’? Lately, some studies showed that women’s performance is increasingly approaching men’s performance, with long-distance swimming in cold water showed the smallest differences between men and women. We have now examined the performance at the 36 km long, Maratona del Golfo Capri-Napoli ‘over the time from 1954 to 2013.Over the years, men like women became faster, the performance development was linear. The difference between the three fastest men and women per year fell from 38% in 1963 to 6% in 2013. Since both the performance as the difference between the services was made linearly, it can be assumed that it becomes possible that women are more foreseeableTime the performance of men can achieve resp.The men can hurt. All numbers can be found under https://springerplus.springeropen.com/articles/10.1186/2193-1801-3-86