Winchester — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Winchester, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Winchester 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 |
|---|---|---|---|
| JUN 23 | 15.3°C | 18.3°C | |
| JUN 24 | 15.4°C | 18.3°C | |
| JUN 25 | 15.9°C | 18.3°C | |
| JUN 26 | 15.9°C | 18.3°C | |
| JUN 27 | 16.7°C | 18.3°C | |
| JUN 28 | 16.8°C | 18.3°C | |
| JUN 29 | 16.3°C | 18.3°C | |
| JUN 30 | 16.6°C | 18.3°C | |
| JUL 1 | 20.0°C | 16.1°C | |
| JUL 2 | 20.0°C | 16.3°C | |
| JUL 3 | 20.0°C | 16.5°C | |
| JUL 4 | 20.0°C | 16.7°C | |
| JUL 5 | 20.0°C | 16.9°C | |
| JUL 6 | 20.0°C | 17.1°C | |
| JUL 7 | 20.0°C | 17.3°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 | 2°C | 6°C | 9°C |
| February | 3°C | 7°C | 9°C |
| March | 5°C | 9°C | 11°C |
| April | 7°C | 11°C | 14°C |
| May | 9°C | 14°C | 18°C |
| June | 12°C | 18°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 | 4°C | 8°C | 11°C |
| December | 3°C | 7°C | 9°C |
Winchester: Weather Forecast
July 1
July 2
July 3
July 4
July 5
July 6
Location & Local Information
Winchester, a historic city in Hampshire, is closely linked with the River Itchen, a clear chalk stream that flows gently through its centre. The river maintains a relatively stable temperature throughout the year, thanks to its spring-fed source. In winter, the water typically ranges from 7–9 °C (45–48 °F), while in spring it warms slightly to around 10–12 °C (50–54 °F). During the summer, the surface temperature can reach 15–17 °C (59–63 °F), especially in calm, sunlit areas, though faster-moving sections remain cooler. By autumn, it cools again to about 10–12 °C (50–54 °F), preserving its fresh and clean quality that supports trout and other wildlife.
Swimming in the River Itchen around Winchester is allowed in certain areas, though care is needed to respect private land and nature conservation zones. The water is exceptionally clear and inviting, making it a popular location for wild swimming during the warmer months. Wetsuits are often used outside midsummer, as the river rarely feels warm. Many locals enjoy short dips near the city’s meadows and footpaths. Beyond swimming, Winchester offers rich heritage attractions such as Winchester Cathedral, Wolvesey Castle, and the scenic water meadows that inspired writers like Keats, all within easy reach of the tranquil river.