Southampton — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Southampton, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Southampton today is 20.3°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 |
|---|---|---|---|
| JUL 16 | 21.9°C | 18.0°C | |
| JUL 17 | 20.9°C | 18.0°C | |
| JUL 18 | 20.9°C | 18.0°C | |
| JUL 19 | 20.9°C | 18.0°C | |
| JUL 20 | 20.9°C | 18.0°C | |
| JUL 21 | 20.4°C | 18.0°C | |
| JUL 22 | 20.4°C | 18.0°C | |
| JUL 24 | 18.0°C | 20.2°C | |
| JUL 25 | 18.0°C | 20.1°C | |
| JUL 26 | 18.0°C | 20.0°C | |
| JUL 27 | 18.0°C | 19.8°C | |
| JUL 28 | 18.0°C | 19.7°C | |
| JUL 29 | 18.0°C | 19.6°C | |
| JUL 30 | 18.0°C | 19.5°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 | 3°C | 7°C | 9°C |
| February | 3°C | 7°C | 9°C |
| March | 4°C | 8°C | 10°C |
| April | 6°C | 9°C | 12°C |
| May | 6°C | 10°C | 15°C |
| June | 12°C | 17°C | 21°C |
| July | 13°C | 18°C | 22°C |
| August | 14°C | 18°C | 23°C |
| September | 10°C | 15°C | 19°C |
| October | 6°C | 9°C | 12°C |
| November | 4°C | 8°C | 11°C |
| December | 3°C | 7°C | 9°C |
Southampton: Weather Forecast
July 24
July 25
July 26
July 27
Location & Local Information
The River Itchen in Southampton, a significant chalk stream, exhibits a pronounced seasonal temperature range typical of the South of England. In winter, the water temperature commonly drops to between 3∘C to 7∘C (37∘F to 45∘F), a dangerous range due to the risk of cold water shock. During summer months, temperatures become much more inviting, potentially rising to 16∘C to 20∘C (61∘F to 68∘F), particularly in slower or tidal sections near the city.
While the non-tidal, upstream sections of the river, especially closer to Winchester, are popular for wild swimming, the tidal sections flowing through Southampton are often avoided. Swimming in the river is not generally prohibited, but it's strongly discouraged near the city docks and downstream due to concerns over heavy boat traffic, strong tidal currents, and poor water quality from urban and sewage runoff. For visitors not seeking a river dip, Southampton offers the historical SeaCity Museum and the modern Westquay shopping centre, while the expansive New Forest National Park is a short drive away.