Lake Llyn Padarn — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Llyn Padarn, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Llyn Padarn today is 15.1°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 |
|---|---|---|---|
| JUN 3 | 15.0°C | 20.9°C | |
| JUN 4 | 14.8°C | 20.9°C | |
| JUN 5 | 14.9°C | 20.9°C | |
| JUN 6 | 14.9°C | 20.9°C | |
| JUN 7 | 15.2°C | 20.9°C | |
| JUN 8 | 15.1°C | 20.9°C | |
| JUN 10 | 15.1°C | 20.9°C | |
| JUN 11 | 20.9°C | 15.4°C | |
| JUN 12 | 20.9°C | 15.7°C | |
| JUN 13 | 20.9°C | 16.0°C | |
| JUN 14 | 20.9°C | 16.3°C | |
| JUN 15 | 20.9°C | 16.6°C | |
| JUN 16 | 20.9°C | 16.8°C | |
| JUN 17 | 20.9°C | 17.1°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 | 2°C | 6°C | 9°C |
| February | 2°C | 6°C | 9°C |
| March | 3°C | 7°C | 10°C |
| April | 7°C | 11°C | 14°C |
| May | 10°C | 17°C | 22°C |
| June | 14°C | 21°C | 27°C |
| July | 18°C | 23°C | 28°C |
| August | 17°C | 22°C | 27°C |
| September | 13°C | 19°C | 24°C |
| October | 10°C | 14°C | 18°C |
| November | 5°C | 9°C | 12°C |
| December | 2°C | 6°C | 9°C |
Lake Llyn Padarn: Water Temperature by Location
Lake Llyn Padarn: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Llyn Padarn, a large glacial lake situated at the foot of Eryri (Snowdonia), is one of the premier locations for open water swimming in Wales and is officially designated as a Bathing Water, meaning its quality is regularly monitored during the summer season. While the activity is permitted and popular, the water remains notably cold year-round. Winter temperatures can drop to a bracing 3∘C to 8∘C (37∘F to 46∘F), while even in summer, the surface rarely exceeds 15∘C to 17∘C (59∘F to 63∘F). Wetsuits are highly recommended for all but the most experienced cold-water swimmers.
The main entry point for swimming and other water activities is often near the pontoon at Y Glyn in Padarn Country Park. The area offers a variety of attractions besides swimming, most notably the towering backdrop of Yr Wyddfa (Snowdon). Visitors can explore the nearby National Slate Museum, ride the heritage Llanberis Lake Railway along the shore, or visit the historic ruin of Dolbadarn Castle which overlooks the water.