Sunbury-on-Thames — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Sunbury-on-Thames, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Sunbury-on-Thames today is 16.1°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 |
|---|---|---|---|
| SEP 16 | 17.9°C | 18.0°C | |
| SEP 17 | 17.8°C | 18.0°C | |
| SEP 18 | 17.4°C | 18.0°C | |
| SEP 19 | 17.3°C | 18.0°C | |
| SEP 20 | 16.4°C | 18.0°C | |
| SEP 21 | 17.0°C | 18.0°C | |
| SEP 22 | 16.6°C | 18.0°C | |
| SEP 23 | 16.1°C | 18.0°C | |
| SEP 24 | 18.0°C | 16.2°C | |
| SEP 25 | 18.0°C | 16.3°C | |
| SEP 26 | 18.0°C | 16.4°C | |
| SEP 27 | 18.0°C | 16.5°C | |
| SEP 28 | 18.0°C | 16.6°C | |
| SEP 29 | 18.0°C | 16.7°C | |
| SEP 30 | 18.0°C | 16.8°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 | 3°C | 7°C | 9°C |
| March | 5°C | 9°C | 11°C |
| April | 8°C | 11°C | 14°C |
| May | 9°C | 14°C | 18°C |
| June | 13°C | 19°C | 24°C |
| July | 16°C | 20°C | 25°C |
| August | 15°C | 19°C | 24°C |
| September | 13°C | 18°C | 22°C |
| October | 9°C | 13°C | 16°C |
| November | 5°C | 8°C | 11°C |
| December | 3°C | 7°C | 9°C |
Sunbury-on-Thames: Weather Forecast
September 23
September 24
September 25
September 26
September 27
Location & Local Information
Sunbury-on-Thames, a riverside town in Surrey, lies along a calm and picturesque section of the River Thames just west of London. The water here reflects the mild southern English climate, with temperature changes following the rhythm of the seasons. In winter, the Thames at Sunbury usually measures around 5–7°C (41–45°F), remaining cold and fast-moving after rainfall. During spring, it gradually warms to 10–13°C (50–55°F), while in summer, particularly in July and August, the temperature often reaches 18–21°C (64–70°F). Early autumn maintains a gentle warmth of about 14–16°C (57–61°F) before the water cools again as the days shorten. The flow is steady but not strong, and the river’s wide bends create many peaceful stretches of water.
Swimming in the Thames at Sunbury-on-Thames is possible, though it is best suited for experienced open-water swimmers who are familiar with local conditions. The river here is relatively clean, but care is needed because of passing boats and uneven depths. In summer, calm mornings often attract swimmers seeking a quiet dip in nature, while others prefer paddleboarding or kayaking along the scenic banks. The town itself offers riverside pubs, walking paths, and easy access to nearby attractions such as Hampton Court Palace and Bushy Park.