Average monthly water temperature in Dun Laoghaire, Ireland
On this page you find the mean water temperature over the year in Dun Laoghaire (Dublin County), Ireland. Take a closer look at the water temperature patterns and what they mean for swimming and recreation.
Water in Dun Laoghaire maintains a consistently cool profile. The warmest month, August, has an average temperature of 15°C (59°F).
The coldest water temperature month is March, averaging 8°C (46°F). These conditions are ideal for enjoying peaceful, less crowded water activities.
Dun Laoghaire Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Dun Laoghaire - and find the best time to visit.
Dun Laoghaire 3-Day Forecast
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Dun Laoghaire climate overview or explore weather in Ireland.
Popular in September
Where to go in September - average daytime high across popular destinations.
Westport
17°C (63°F) Doolin17°C (63°F) Kilkenny
18°C (64°F) Cork18°C (64°F) Kenmare18°C (64°F) Killarney17°C (63°F) Galway18°C (64°F) Dublin18°C (64°F) 
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