What is the current water temperature in Dún Laoghaire?

Q: What is the current water temperature in Dún Laoghaire?

As of now, in Dún Laoghaire, the water temperature is 16.4°C. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it.

Ireland > Dún Laoghaire

Water temperature in Dún Laoghaire

Detailed information about the current water temperature in Dún Laoghaire. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

61.5

°F

September 12, 21:39

Trend:

stable

Yesterday:

61.1°F

Tomorrow:

61.4°F

Sunrise:

06:52

Sunset:

19:48

Day Length:

12 h. 56 min.

Dún Laoghaire in September

Minimum:

44.4°F

Average:

47.6°F

Maximum:

49.0°F

Sea water temperature in Dún Laoghaire today

As of now, in Dún Laoghaire, the water temperature is 61.5°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 1.7°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 62.2°F on 2023, while the historical minimum was 58.4°F on 2018.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 61.2°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Dún Laoghaire

Date	Current Year actual* / forecast**	last year	10 years average
Aug 29	63.1°F	61.6°F	60.2°F
Aug 30	62.4°F	61.5°F	60.2°F
Aug 31	62.7°F	61.5°F	60.3°F
Sep 1	62.0°F	61.3°F	60.2°F
Sep 2	61.8°F	60.7°F	60.2°F
Sep 3	61.6°F	60.5°F	60.1°F
Sep 4	61.4°F	60.5°F	60.1°F
Sep 5	61.8°F	61.1°F	60.2°F
Sep 6	61.9°F	60.9°F	60.3°F
Sep 7	62.1°F	60.6°F	60.2°F
Sep 8	61.5°F	60.8°F	60.3°F
Sep 9	61.4°F	61.1°F	60.3°F
Sep 10	61.6°F	60.9°F	60.3°F
Sep 11	61.1°F	61.0°F	60.1°F
Sep 12	61.5°F	60.6°F	59.8°F
Sep 13	61.4°F	60.1°F	59.7°F
Sep 14	61.4°F	60.2°F	59.6°F
Sep 15	61.3°F	59.9°F	59.6°F
Sep 16	61.2°F	59.8°F	59.5°F
Sep 17	61.0°F	59.5°F	59.2°F
Sep 18	60.9°F	59.8°F	59.2°F
Sep 19	60.9°F	59.5°F	59.2°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Dún Laoghaire by month

In an average year, Dún Laoghaire offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in Dún Laoghaire was recorded on July 25, 2026, reaching a 64.3°F. While the coldest temperature occurred on March 11, 2018, dipping to 42.8°F. The average readings by season are 47.5°F in Winter, 48.8°F in Spring, 58.7°F in Summer, and 56.5°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Dublin	61.8°F	5mi
Bray	61.2°F	6mi
Greystones	61.1°F	11mi

* current water temperature in this city

** straight line distance from Dún Laoghaire