River Barrow — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the River Barrow, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the River Barrow today is 15.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 |
|---|---|---|---|
| AUG 26 | 14.4°C | 18.0°C | |
| AUG 27 | 15.3°C | 18.0°C | |
| AUG 28 | 15.4°C | 18.0°C | |
| AUG 29 | 15.6°C | 18.0°C | |
| AUG 30 | 15.6°C | 18.0°C | |
| AUG 31 | 15.5°C | 18.0°C | |
| SEP 1 | 15.4°C | 16.0°C | |
| SEP 2 | 15.4°C | 16.0°C | |
| SEP 3 | 16.0°C | 15.5°C | |
| SEP 4 | 16.0°C | 15.6°C | |
| SEP 5 | 16.0°C | 15.6°C | |
| SEP 6 | 16.0°C | 15.6°C | |
| SEP 7 | 16.0°C | 15.6°C | |
| SEP 8 | 16.0°C | 15.7°C | |
| SEP 9 | 16.0°C | 15.7°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 | 1°C | 5°C | 8°C |
| February | 1°C | 5°C | 8°C |
| March | 2°C | 6°C | 9°C |
| April | 6°C | 9°C | 12°C |
| May | 9°C | 14°C | 18°C |
| June | 13°C | 18°C | 23°C |
| July | 15°C | 19°C | 24°C |
| August | 14°C | 18°C | 23°C |
| September | 11°C | 16°C | 20°C |
| October | 9°C | 12°C | 15°C |
| November | 4°C | 8°C | 11°C |
| December | 1°C | 5°C | 9°C |
River Barrow: Water Temperature by Location
River Barrow: Weather Forecast
September 3
September 4
September 5
September 6
September 7
September 8
Location & Local Information
Source Slieve Bloom Mountains
• location Glenbarrow, Laois
• elevation 350 m (1,150 ft)
Mouth Celtic Sea
• location Waterford Harbour, Waterford
Length 192 km (119 mi)
The River Barrow, flowing through Counties Laois, Carlow, Kilkenny, Kildare, and Wexford before joining the River Suir near Waterford Harbour, is Ireland’s second-longest river. Its water temperature changes moderately with the seasons, reflecting the mild inland climate and steady flow. In winter, average temperatures are around 4–6°C (39–43°F), while during summer they typically reach 15–18°C (59–64°F). On warm, calm days in July or August, sheltered sections may rise to about 19°C (66°F), though the deeper stretches stay cooler. Because of its slow-moving character in many areas, the Barrow warms slightly faster than larger rivers like the Shannon, making it pleasant for outdoor activity in late spring and summer.
Swimming in the River Barrow is allowed and enjoyed in several places, particularly around Graiguenamanagh, St. Mullins, and Carlow town, where the water is clean and access points are easy. Swimmers are advised to stay clear of weirs and locks, as these can create strong undercurrents. During the warmer months, locals and visitors often take short swims or join open-water groups, with wetsuits recommended outside high summer. The Barrow Way walking trail runs along the riverbank, providing scenic routes for walkers and cyclists. Historic towns, stone bridges, and quiet woodland stretches make the River Barrow a peaceful destination for both swimming and exploration.