Munster Blackwater River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Munster Blackwater River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Munster Blackwater River today is 18.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUL 16 | 19.8°C | 18.0°C | |
| JUL 17 | 19.7°C | 18.0°C | |
| JUL 18 | 19.4°C | 18.0°C | |
| JUL 19 | 19.4°C | 18.0°C | |
| JUL 20 | 19.4°C | 18.0°C | |
| JUL 21 | 19.3°C | 18.0°C | |
| JUL 22 | 18.8°C | 18.0°C | |
| JUL 23 | 18.8°C | 18.0°C | |
| JUL 24 | 18.0°C | 18.8°C | |
| JUL 25 | 18.0°C | 18.7°C | |
| JUL 26 | 18.0°C | 18.7°C | |
| JUL 27 | 18.0°C | 18.6°C | |
| JUL 28 | 18.0°C | 18.6°C | |
| JUL 29 | 18.0°C | 18.6°C | |
| JUL 30 | 18.0°C | 18.5°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.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 0°C | 4°C | 8°C |
| February | 0°C | 5°C | 10°C |
| March | 2°C | 6°C | 10°C |
| April | 6°C | 9°C | 12°C |
| May | 10°C | 15°C | 19°C |
| June | 12°C | 17°C | 22°C |
| July | 14°C | 18°C | 23°C |
| August | 14°C | 18°C | 23°C |
| September | 10°C | 15°C | 19°C |
| October | 8°C | 11°C | 14°C |
| November | 3°C | 7°C | 12°C |
| December | 4°C | 7°C | 10°C |
Munster Blackwater River: Water Temperature by Location
Munster Blackwater River: Weather Forecast
July 24
July 25
July 26
July 27
Location & Local Information
Source Mullaghareirk Mountains
• location County Kerry
• coordinates 52.192°N 9.241°W
• elevation 229 m (751 ft)
Mouth Celtic Sea
• location Youghal Harbour, Cork
• coordinates 51.942°N 7.833°W
Length 169 km (105 mi)
The Munster Blackwater River flows westward across Ireland, and its water temperature, like other Irish rivers, is cold for much of the year, providing an invigorating experience for those who choose to swim. During the colder seasons, water temperatures typically hover between 5∘C and 10∘C (41∘F to 50∘F). In the height of summer, the river warms up, reaching a comfortable range of 16∘C to 19∘C (61∘F to 66∘F), depending on the stretch and recent weather.
Wild swimming is a popular activity in many locations along the Blackwater, and it is generally tolerated, provided swimmers exercise caution and respect for the environment. Towns like Fermoy even host organized events, such as the annual Martin Duggan Memorial Swim, highlighting the river’s suitability for swimming in certain areas. However, swimmers should be mindful of water quality, especially after heavy rain, and the strong currents that can exist, particularly in the lower tidal reaches near Youghal. Beyond swimming, the river valley is a hub for tourism, with attractions like the magnificent Lismore Castle and the scenic Blackwater Valley Scenic Drive.