Welcome, jliller. All weather data that has not yet been digitized has use. Our particular bottleneck is in getting the logs scanned and online - and we admit the traveling and comments that teach us history also add interest. But Philip and Kevin, our scientists in Britain and the US, are always interested in sources. I will definitely tell them of your offer.
As to timing, if the logs are handwritten in any decade where computerized data was not possible, it is of a time that is useful. Eventually our ships will cover 1840s to 1940s, but the 1950s is the start of computerization.