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Open-water swimming weather in Galway

If you're planning anything outdoors in Galway, the city's full Atlantic exposure on the west coast of Ireland makes it among the wettest places in these islands — well over 1,100mm a year, around 230 rainy days, and weather that genuinely can change hour to hour. The trade-off is mild winters thanks to the Gulf Stream, dramatic skies, and the kind of light that makes the rain feel like it has character.

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If you're swimming open-water around Galway (Salthill, Blackrock, the Galway Bay coast), the Atlantic sea temperatures lag the air by several weeks in spring — but the mild winters mean the season runs longer than people expect, and the city has a genuine year-round swimming culture at Blackrock.

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Last updated: 7 May 2026