Sywell Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Sywell Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Sywell Reservoir today is 15.9°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 15 | 17.5°C | 18.0°C | |
| SEP 16 | 17.6°C | 18.0°C | |
| SEP 17 | 17.6°C | 18.0°C | |
| SEP 18 | 17.5°C | 18.0°C | |
| SEP 19 | 16.9°C | 18.0°C | |
| SEP 20 | 16.2°C | 18.0°C | |
| SEP 21 | 16.8°C | 18.0°C | |
| SEP 22 | 16.3°C | 18.0°C | |
| SEP 23 | 18.0°C | 16.0°C | |
| SEP 24 | 18.0°C | 16.1°C | |
| SEP 25 | 18.0°C | 16.2°C | |
| SEP 26 | 18.0°C | 16.3°C | |
| SEP 27 | 18.0°C | 16.4°C | |
| SEP 28 | 18.0°C | 16.5°C | |
| SEP 29 | 18.0°C | 16.6°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 | 4°C | 7°C |
| February | 1°C | 5°C | 8°C |
| March | 3°C | 7°C | 10°C |
| April | 7°C | 11°C | 14°C |
| May | 10°C | 17°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 | 1°C | 5°C | 8°C |
Sywell Reservoir: Water Temperature by Location
Sywell Reservoir: Weather Forecast
September 23
September 24
September 25
September 26
September 27
Location & Local Information
#Northamptonshire
Sywell Reservoir in Northamptonshire is a relatively shallow, managed waterbody so temperatures vary through the year. In winter the surface typically sits around 4–8 °C (39–46 °F), rising in spring to roughly 8–14 °C (46–57 °F). By summer the water can reach about 16–22 °C (61–72 °F) on warm spells before cooling again in autumn to around 8–14 °C (46–57 °F). These are approximate seasonal ranges; actual conditions depend on recent weather, depth and wind, and colder pockets can persist even in summer.
Open swimming at Sywell is generally not permitted because it is a working reservoir with safety hazards, variable water quality and no lifeguard provision. Entry is typically restricted by the managing authority for public safety and to protect water resources. Visitors instead use the site for walking, birdwatching and picnics. Nearby attractions include Sywell Aerodrome with its aviation events and museum, rural footpaths through the surrounding countryside and several village pubs and cafés, making the area pleasant for a day visit even if intentional open-water swimming is discouraged.