In January warmest sea in Ireland is usually observed in the following locations: Cork, Killarney, Dublin.
Table below shows the average sea water temperature for marine resorts of Ireland in January for the last three years.
| Place name | January 2025 | January 2024 | January 2023 |
|---|---|---|---|
| Cork | 48.8°F | 48.7°F | 49.0°F |
| Killarney | 48.2°F | 48.1°F | 47.9°F |
| Dublin | 45.9°F | 46.7°F | 46.5°F |
| Limerick | 45.5°F | 47.8°F | 45.6°F |
Charts below show average sea water temperature for Ireland resorts with the warmest sea in January.
You can also check other months of the year to see sea temperature of Ireland resorts at that time.
