Blackrock — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Blackrock (Republic of Ireland). It includes the current water temperature, daily data for the last month presented in a simple chart, and a 7-day forecast. The page also compares today’s value with typical averages for this period, shows usual monthly ranges during the year, and lists nearby beaches with short descriptions. Local weather for the next few days and general details about Blackrock help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Blackrock in the Irish Sea today is 14°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear.
It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Water temperature in Blackrock rose over the last 30 days but fell over the last week. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Blackrock will be 12.9°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUN 5 | 14.6°C | 12.5°C | |
| JUN 6 | 14.8°C | 12.5°C | |
| JUN 7 | 14.3°C | 12.8°C | |
| JUN 8 | 14.2°C | 12.3°C | |
| JUN 9 | 14.2°C | 13.0°C | |
| JUN 10 | 14.1°C | 13.0°C | |
| JUN 11 | 13.8°C | 13.0°C | |
| JUN 12 | 13.8°C | 13.0°C | |
| JUN 13 | 13.5°C | 13.0°C | 13.5°C |
| JUN 14 | 12.5°C | 13.4°C | |
| JUN 15 | 12.5°C | 13.3°C | |
| JUN 16 | 12.8°C | 13.2°C | |
| JUN 17 | 12.5°C | 13.1°C | |
| JUN 18 | 12.5°C | 13.1°C | |
| JUN 19 | 13.0°C | 13.0°C | |
| JUN 20 | 13.3°C | 12.9°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Water temperature data for this location is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
Annual Water Temperature Trend
Blackrock is a coastal suburb on the southern side of Dublin Bay in Leinster, offering a mix of rocky shorelines, promenades and sheltered bathing spots. The sea temperatures around Blackrock are strongly seasonal and influenced by the Irish Sea and prevailing weather. Typically winter water temperatures (December–February) range from about 6–9 °C, spring (March–May) usually sees 8–13 °C, summer (June–August) brings the warmest conditions at roughly 13–17 °C, and autumn (September–November) cools back to around 10–14 °C. Short-term variations are common: a warm spell can push surface values a degree or two higher, while onshore winds and storms can lower temperatures and reduce clarity. Tidal flow and local currents also affect how cold the water feels at different points along the shore.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 7°C | 9°C | 10°C |
| February | 7°C | 8°C | 10°C |
| March | 6°C | 8°C | 10°C |
| April | 7°C | 9°C | 11°C |
| May | 8°C | 11°C | 13°C |
| June | 9°C | 13°C | 16°C |
| July | 11°C | 15°C | 19°C |
| August | 13°C | 15°C | 18°C |
| September | 13°C | 14°C | 17°C |
| October | 11°C | 14°C | 15°C |
| November | 10°C | 12°C | 14°C |
| December | 9°C | 10°C | 12°C |
* Click on a month to view detailed water temperature data.
Blackrock: Weather Forecast
June 14
June 15
June 16
Location, Beaches & Local Information
Nearby Beaches & Facilities
Blackrock Beach
Ladies Beach
The Priests Beach
The Ladies' Beach
Annagassan Bay Beach
Gyles Quay Bay Beach
Castlecarragh Bay Beach
Swimming Conditions
Swimming around Blackrock suits a range of preferences from quick dips to organised open-water sessions, though the generally cool temperatures mean many regulars use wetsuits outside peak summer. There are sheltered rock pools and small beaches for brief swims and paddling, while more experienced swimmers and local clubs take advantage of the calmer days for longer sea swims off the headlands. Facilities nearby include promenades and spots to change and warm up ashore, but bathing is largely unsupervised in many places so swimmers should be mindful of tides, submerged rocks and sudden weather changes. For a comfortable beach-style holiday, plan visits in high summer, and if you intend regular open-water swimming choose appropriate gear and check local advice on conditions.