River Inny — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the River Inny, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the River Inny today is 17.5°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 6 | 17.5°C | 18.0°C | |
| AUG 7 | 17.5°C | 18.0°C | |
| AUG 8 | 17.5°C | 18.0°C | |
| AUG 9 | 17.3°C | 18.0°C | |
| AUG 10 | 17.5°C | 18.0°C | |
| AUG 11 | 17.6°C | 18.0°C | |
| AUG 12 | 17.4°C | 18.0°C | |
| AUG 13 | 17.5°C | 18.0°C | |
| AUG 14 | 18.0°C | 17.5°C | |
| AUG 15 | 18.0°C | 17.6°C | |
| AUG 16 | 18.0°C | 17.6°C | |
| AUG 17 | 18.0°C | 17.6°C | |
| AUG 18 | 18.0°C | 17.6°C | |
| AUG 19 | 18.0°C | 17.7°C | |
| AUG 20 | 18.0°C | 17.7°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 | 7°C | 10°C |
| December | 1°C | 5°C | 8°C |
River Inny: Water Temperature by Location
River Inny: Weather Forecast
August 14
August 15
August 16
August 17
Location & Local Information
Source:
• location Near Oldcastle and Loughcrew, County Meath
Mouth:
• location Lough Ree (River Shannon)
Length 88.5 km (55.0 mi)
The River Inny flows through Counties Longford and Westmeath in central Ireland before entering Lough Ree, part of the River Shannon system. Its water temperature reflects the mild inland climate of the Irish Midlands. In winter, the Inny typically stays around 4–6°C (39–43°F), while in summer it warms to about 15–18°C (59–64°F). During calm, sunny days in July or August, sheltered bends or shallow stretches may briefly reach 19°C (66°F), though cooler layers persist below the surface. The moderate seasonal variation makes the Inny suitable for outdoor recreation, with swimming most comfortable from late May to early September when air and water temperatures are mildest.
Swimming in the River Inny is permitted, though it is more commonly used for fishing and boating. The water quality in many areas is good, but swimmers should be cautious of varying depths and stronger currents after heavy rain. Local residents and visitors sometimes swim in calm sections near Ballymahon and Abbeyshrule, where access is easy and the flow is gentle. Wetsuits are recommended outside midsummer, as the water cools quickly below the surface. The surrounding area offers pleasant countryside walks, historic abbeys, and access to the Royal Canal Greenway, making the Inny Valley a quiet and scenic part of inland Ireland.