The expression λιμὴν κλειστός appears 29 times in ancient Greek literary sources; however, it has prompted four different interpretations and three possible English translations. As a contribution to the ongoing discussion of the expression's meaning, this paper analyses its appearances in Strabo's Geography; this work, with its nine references, is, in fact, the source in which it appears second most often. In particular, focus will be placed upon two issues: the extent to which the expression is employed consistently in the Geography and its possible origin; and what meaning(s) – if any – can be assigned to it. To gain further insight into the expression's meaning(s), the aforementioned cases of ‘closed harbours’ will be compared with the available archaeological and geomorphological evidence.