Lake Semerwater — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Semerwater, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Semerwater today is 12.3°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 | 18.0°C | |
| SEP 17 | 13.8°C | 18.0°C | |
| SEP 18 | 13.4°C | 18.0°C | |
| SEP 19 | 13.3°C | 18.0°C | |
| SEP 20 | 13.2°C | 18.0°C | |
| SEP 21 | 13.4°C | 18.0°C | |
| SEP 22 | 12.9°C | 18.0°C | |
| SEP 23 | 12.3°C | 18.0°C | |
| SEP 24 | 18.0°C | 12.6°C | |
| SEP 25 | 18.0°C | 12.9°C | |
| SEP 26 | 18.0°C | 13.2°C | |
| SEP 27 | 18.0°C | 13.4°C | |
| SEP 28 | 18.0°C | 13.7°C | |
| SEP 29 | 18.0°C | 14.0°C | |
| SEP 30 | 18.0°C | 14.3°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 | 7°C |
| February | 0°C | 4°C | 7°C |
| March | 2°C | 6°C | 9°C |
| April | 5°C | 9°C | 12°C |
| May | 9°C | 14°C | 20°C |
| June | 12°C | 19°C | 25°C |
| July | 15°C | 21°C | 26°C |
| August | 15°C | 21°C | 26°C |
| September | 12°C | 18°C | 23°C |
| October | 8°C | 12°C | 15°C |
| November | 4°C | 8°C | 11°C |
| December | 0°C | 4°C | 7°C |
Lake Semerwater: Water Temperature by Location
Lake Semerwater: Weather Forecast
September 23
September 24
September 25
September 26
September 27
Location & Local Information
#North Yorkshire
Semerwater in Raydale, North Yorkshire, tends to be cool year-round. Winter surface temperatures typically sit around 1–5°C (34–41°F), spring warms to roughly 6–12°C (43–54°F), and summer normally ranges from about 15–20°C (59–68°F), occasionally reaching near 22°C (72°F) in warm spells; autumn then drops back toward 8–12°C (46–54°F). These figures vary with weather, depth and wind, so the lake can feel much colder than air temperatures suggest. Wild swimming is possible but informal: there are no designated lifeguarded beaches or organised bathing facilities, and access is largely along natural shores, so people swim at their own risk. The combination of cool water, variable depths and occasional boating means caution is advised.
Beyond swimming, Semerwater sits within the scenic Yorkshire Dales and makes a good base for walking, birdwatching and photography. Nearby attractions include the village of Bainbridge, Aysgarth Falls and historic Bolton Castle, while many visitors also explore Wensleydale’s trails and local villages for food, pubs and rural scenery.