Windsor — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Windsor, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Windsor today is 18.6°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 24 | 19.1°C | 19.0°C | |
| JUN 25 | 19.2°C | 19.0°C | |
| JUN 26 | 19.2°C | 19.0°C | |
| JUN 27 | 20.4°C | 19.0°C | |
| JUN 28 | 20.4°C | 19.0°C | |
| JUN 29 | 19.9°C | 19.0°C | |
| JUN 30 | 20.0°C | 19.0°C | |
| JUL 2 | 20.0°C | 18.7°C | |
| JUL 3 | 20.0°C | 18.7°C | |
| JUL 4 | 20.0°C | 18.8°C | |
| JUL 5 | 20.0°C | 18.9°C | |
| JUL 6 | 20.0°C | 19.0°C | |
| JUL 7 | 20.0°C | 19.0°C | |
| JUL 8 | 20.0°C | 19.1°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 | 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 | 4°C | 8°C | 11°C |
| December | 3°C | 7°C | 9°C |
Windsor: Weather Forecast
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July 4
July 5
July 6
Location & Local Information
Windsor, a historic town on the River Thames in Berkshire, enjoys one of the river’s most scenic and tranquil stretches. The Thames here flows gently through parkland and meadows, creating ideal conditions for boating and riverside recreation. Water temperatures in this part of the river vary throughout the year with the mild southern English climate. In winter, the temperature typically averages around 5–7°C (41–45°F), rising in spring to about 10–13°C (50–55°F). During the summer months, July and August are warmest, with the water reaching 18–21°C (64–70°F) on sunny days. By early autumn, it cools again to roughly 13–15°C (55–59°F), remaining pleasant for short swims and paddling.
Swimming in the River Thames at Windsor is possible but approached with care. The water is generally clean, but swimming is not officially encouraged because of boat traffic, changing depths, and occasional strong currents near locks and weirs. Experienced wild swimmers often choose calm sections or supervised open-water events held in nearby areas. For most visitors, boating, paddleboarding, or simply enjoying the riverside walks are preferred ways to experience the water. Beyond the river, Windsor’s main attractions include Windsor Castle, Eton College, and the lush riverside parks that make the town a peaceful yet vibrant destination.