Long before meteorology and climate science, Irish people looked to the natural world to forecast the weather and make sense of their surroundings. They read the skies, the seas and the behaviour of animals for signs of change: a halo around the moon meant rain was near; swallows flying low foretold a storm.

This weather lore – known as seanchas i dtaobh na haimsire in Irish – was grounded in generations of observation and shared through memorable sayings or rhymes. One familiar example is: “Red sky at night is a shepherd’s delight; red sky in the morning is a shepherd’s warning.” But weather lore is more than folklore. It is evidence of a society attuned to subtle environmental cues – what researchers now call traditional ecological or environmental knowledge.

Weather lore forms part of Ireland’s cultural heritage (dúchas) preserved in the National Folklore Collection, one of western Europe’s largest archives of oral tradition. Established in the 1930s and now digitised, it encompasses several compilations, including the Main Manuscript Collection of field-recorded folklore and the Schools’ Collection, gathered by schoolchildren from older generations. Together, these hold millions of pages of stories, customs and beliefs, among them thousands of weather sayings in both Irish and English.

Across the archive, weather lore........

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