малая вода означает в английский

low tide▼(the tide at its lowest level)
noun
[UK: ləʊ taɪd] [US: ˈloʊ ˈtaɪd]

neap tide [neap tides]▼(tide which occurs when the moon is in its first or third quarter)
noun
[UK: niːp taɪd] [US: niːp ˈtaɪd]