Loch Ness — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Loch Ness, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Loch Ness today is 12.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear. 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 16 | 13.7°C | 15.0°C | |
| SEP 17 | 13.5°C | 15.0°C | |
| SEP 18 | 13.4°C | 15.0°C | |
| SEP 19 | 13.3°C | 15.0°C | |
| SEP 20 | 13.1°C | 15.0°C | |
| SEP 21 | 13.0°C | 15.0°C | |
| SEP 22 | 12.4°C | 15.0°C | |
| SEP 23 | 12.8°C | 15.0°C | |
| SEP 24 | 15.0°C | 12.9°C | |
| SEP 25 | 15.0°C | 13.0°C | |
| SEP 26 | 15.0°C | 13.1°C | |
| SEP 27 | 15.0°C | 13.2°C | |
| SEP 28 | 15.0°C | 13.4°C | |
| SEP 29 | 15.0°C | 13.5°C | |
| SEP 30 | 15.0°C | 13.6°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 | 3°C | 6°C |
| February | 0°C | 3°C | 7°C |
| March | 0°C | 4°C | 8°C |
| April | 4°C | 8°C | 12°C |
| May | 9°C | 14°C | 20°C |
| June | 13°C | 19°C | 24°C |
| July | 15°C | 21°C | 26°C |
| August | 14°C | 20°C | 25°C |
| September | 10°C | 15°C | 21°C |
| October | 6°C | 10°C | 13°C |
| November | 3°C | 7°C | 11°C |
| December | 1°C | 5°C | 8°C |
Loch Ness: Water Temperature by Location
Loch Ness: Weather Forecast
September 23
September 24
September 25
September 26
September 27
Location & Local Information
Loch Ness, the largest lake by volume in Scotland, stretches through the Great Glen and is famous for its deep, cold waters and dramatic surroundings. Because of its great depth and highland location, the loch’s water temperature remains low and fairly stable throughout the year. In winter, it usually measures around 4–5 °C (39–41 °F), rising only slightly to 8–10 °C (46–50 °F) in late spring. During the summer months, the surface can warm to 12–14 °C (54–57 °F) on calm, sunny days, though deeper layers remain near 5 °C (41 °F). By autumn, the temperature quickly drops again toward 8 °C (46 °F), giving Loch Ness its consistently chilly character.
Swimming in Loch Ness is permitted and draws adventurous open-water swimmers, though the cold temperature and great depth mean it is best suited to experienced participants. Wetsuits are recommended at all times of year, as the loch rarely feels warm even in midsummer. The water is clean but can become rough in windy conditions, so safety precautions are essential. Many visitors prefer to enjoy the loch from its shorelines or by boat. Nearby attractions include Urquhart Castle, the Caledonian Canal, and the surrounding Highland scenery, offering opportunities for hiking, wildlife watching, and exploring one of Scotland’s most iconic natural landmarks.