Lough Leane — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lough Leane, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lough Leane today is 15.7°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 |
|---|---|---|---|
| SEP 2 | 17.5°C | 18.0°C | |
| SEP 3 | 16.6°C | 18.0°C | |
| SEP 4 | 16.5°C | 18.0°C | |
| SEP 5 | 16.6°C | 18.0°C | |
| SEP 6 | 16.3°C | 18.0°C | |
| SEP 7 | 16.1°C | 18.0°C | |
| SEP 8 | 16.0°C | 18.0°C | |
| SEP 9 | 16.1°C | 18.0°C | |
| SEP 10 | 18.0°C | 15.8°C | |
| SEP 11 | 18.0°C | 15.9°C | |
| SEP 12 | 18.0°C | 16.0°C | |
| SEP 13 | 18.0°C | 16.2°C | |
| SEP 14 | 18.0°C | 16.3°C | |
| SEP 15 | 18.0°C | 16.4°C | |
| SEP 16 | 18.0°C | 16.5°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 | 1°C | 5°C | 10°C |
| March | 3°C | 7°C | 11°C |
| April | 7°C | 11°C | 15°C |
| May | 12°C | 18°C | 23°C |
| June | 14°C | 20°C | 26°C |
| July | 17°C | 22°C | 27°C |
| August | 17°C | 22°C | 27°C |
| September | 12°C | 18°C | 23°C |
| October | 9°C | 13°C | 17°C |
| November | 4°C | 8°C | 12°C |
| December | 5°C | 8°C | 11°C |
Lough Leane: Water Temperature by Location
Lough Leane: Weather Forecast
September 10
September 11
September 12
September 13
September 14
Location & Local Information
Lough Leane, the largest of the Killarney Lakes in County Kerry, lies within Killarney National Park and is surrounded by forested mountains and historic estates. The water is cool year-round, with winter temperatures averaging around 5–7°C (41–45°F) and summer temperatures usually reaching 14–17°C (57–63°F). On rare warm days, shallow bays can rise to about 18–19°C (64–66°F), but the deeper sections stay noticeably cooler. These mild temperatures reflect the region’s maritime climate, where Atlantic breezes and frequent rain keep the lake fresh but never warm. The most comfortable time for swimming is typically between June and early September, when both the water and air are at their mildest.
Swimming is allowed in Lough Leane, and many visitors enjoy brief dips or open-water swimming from designated spots such as Ross Castle and Muckross Lake’s connecting areas. However, swimmers should be cautious of sudden depth changes, cool undercurrents, and boat traffic. Wetsuits are common for longer swims. Beyond the water, the area offers numerous attractions including Ross Castle, the scenic Gap of Dunloe, and walking or cycling trails through Killarney National Park. Together they create a combination of natural beauty and outdoor activity that makes Lough Leane a distinctive and memorable destination in southwest Ireland.