What is the current water temperature in Greystones?

Q: What is the current water temperature in Greystones?

As of now, in Greystones, the water temperature is 16.2°C. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it.

Ireland > Greystones

Water temperature in Greystones

Detailed information about the current water temperature in Greystones. 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.

61.2

°F

September 9, 19:12

Trend:

stable

Yesterday:

61.0°F

Tomorrow:

61.1°F

Sunrise:

06:47

Sunset:

19:55

Day Length:

13 h. 8 min.

Greystones in September

Minimum:

45.0°F

Average:

48.2°F

Maximum:

49.4°F

Sea water temperature in Greystones today

As of now, in Greystones, the water temperature is 61.2°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 0.9°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. 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 62.1°F on 2023, while the historical minimum was 58.7°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. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 60.7°F, the minimum temperature may reach 60.4°F, and the maximum might stay at 61.1°F.

Daily water temperature in Greystones

Date	Current Year actual* / forecast**	last year	10 years average
Aug 26	60.9°F	61.2°F	60.1°F
Aug 27	61.2°F	61.7°F	60.2°F
Aug 28	61.1°F	61.6°F	60.0°F
Aug 29	61.9°F	61.3°F	60.0°F
Aug 30	61.8°F	61.0°F	59.9°F
Aug 31	61.8°F	60.8°F	60.0°F
Sep 1	61.4°F	60.6°F	59.9°F
Sep 2	61.3°F	60.9°F	60.0°F
Sep 3	61.4°F	60.8°F	60.1°F
Sep 4	61.3°F	60.7°F	60.0°F
Sep 5	61.5°F	61.5°F	60.1°F
Sep 6	61.5°F	61.4°F	60.2°F
Sep 7	61.9°F	61.1°F	60.2°F
Sep 8	61.0°F	60.9°F	60.2°F
Sep 9	61.2°F	61.5°F	60.2°F
Sep 10	61.1°F	61.1°F	60.2°F
Sep 11	61.0°F	61.3°F	60.0°F
Sep 12	60.8°F	60.8°F	59.8°F
Sep 13	60.6°F	60.4°F	59.7°F
Sep 14	60.6°F	60.5°F	59.6°F
Sep 15	60.6°F	60.2°F	59.6°F
Sep 16	60.4°F	60.0°F	59.5°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 Greystones by month

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

The warmest water in Greystones was recorded on July 25, 2026, reaching a 63.4°F. While the coldest temperature occurred on March 11, 2018, dipping to 43.0°F. The average readings by season are 48.0°F in Winter, 48.7°F in Spring, 58.1°F in Summer, and 56.8°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Bray	61.3°F	5mi
Dún Laoghaire	61.4°F	11mi
Dublin	61.5°F	15mi

* current water temperature in this city

** straight line distance from Greystones