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 15.13°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

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.

59.2

°F

June 29, 04:13

Trend:

stable

Yesterday:

59.2°F

Tomorrow:

59.2°F

Sunrise:

05:00

Sunset:

21:55

Day Length:

16 h. 55 min.

Greystones in July

Minimum:

45.6°F

Average:

48.3°F

Maximum:

49.8°F

Sea water temperature in Greystones today

As of now, in Greystones, the water temperature is 59.2°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 2.2°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 notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 58.1°F on 2025, while the historical minimum was 55.9°F on 2019.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 59.5°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Greystones

Date	Current Year actual* / forecast**	last year	10 years average
Jun 15	55.9°F	55.5°F	55.6°F
Jun 16	55.9°F	55.4°F	55.7°F
Jun 17	55.9°F	56.3°F	55.9°F
Jun 18	56.6°F	56.4°F	55.9°F
Jun 19	56.8°F	56.6°F	56.0°F
Jun 20	56.8°F	56.6°F	56.1°F
Jun 21	56.5°F	56.7°F	56.1°F
Jun 22	57.0°F	57.2°F	56.3°F
Jun 23	58.1°F	57.3°F	56.4°F
Jun 24	58.5°F	57.3°F	56.6°F
Jun 25	58.6°F	57.7°F	56.9°F
Jun 26	59.1°F	57.7°F	56.7°F
Jun 27	59.5°F	58.2°F	57.1°F
Jun 28	59.2°F	58.6°F	57.0°F
Jun 29	59.2°F	58.1°F	57.0°F
Jun 30	59.2°F	58.5°F	57.0°F
Jul 1	59.2°F	58.4°F	57.0°F
Jul 2	59.3°F	58.1°F	57.1°F
Jul 3	59.5°F	58.0°F	57.3°F
Jul 4	59.5°F	58.2°F	57.3°F
Jul 5	59.8°F	59.1°F	57.6°F
Jul 6	59.7°F	58.3°F	57.5°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 September 10, 2023, reaching a 62.3°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, 58.0°F in Summer, and 56.7°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Bray	59.0°F	5mi
Dún Laoghaire	59.5°F	11mi
Dublin	60.1°F	15mi

* current water temperature in this city

** straight line distance from Greystones