River Irwell — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the River Irwell, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the River Irwell today is 18.5°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 |
|---|---|---|---|
| AUG 6 | 18.6°C | 18.0°C | |
| AUG 7 | 18.4°C | 18.0°C | |
| AUG 8 | 18.4°C | 18.0°C | |
| AUG 9 | 18.4°C | 18.0°C | |
| AUG 10 | 18.1°C | 18.0°C | |
| AUG 11 | 18.1°C | 18.0°C | |
| AUG 12 | 18.1°C | 18.0°C | |
| AUG 13 | 18.1°C | 18.0°C | |
| AUG 14 | 18.0°C | 18.5°C | |
| AUG 15 | 18.0°C | 18.5°C | |
| AUG 16 | 18.0°C | 18.4°C | |
| AUG 17 | 18.0°C | 18.4°C | |
| AUG 18 | 18.0°C | 18.4°C | |
| AUG 19 | 18.0°C | 18.4°C | |
| AUG 20 | 18.0°C | 18.3°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 | 1°C | 5°C | 8°C |
| February | 1°C | 5°C | 8°C |
| March | 2°C | 6°C | 9°C |
| April | 6°C | 9°C | 12°C |
| May | 9°C | 14°C | 18°C |
| June | 13°C | 19°C | 23°C |
| July | 15°C | 19°C | 24°C |
| August | 14°C | 18°C | 23°C |
| September | 11°C | 16°C | 20°C |
| October | 9°C | 12°C | 15°C |
| November | 4°C | 8°C | 11°C |
| December | 1°C | 5°C | 8°C |
River Irwell: Water Temperature by Location
River Irwell: Weather Forecast
August 14
August 15
August 16
August 17
August 18
August 19
Location & Local Information
Source Irwell Springs
• location Deerplay Moor, Cliviger, Lancashire
• coordinates 53°44′10″N 2°11′59″W
• elevation 400 m (1,300 ft)
Mouth River Mersey
• location Manchester Ship Canal, Irlam
Length 63 km (39 mi)
The River Irwell, flowing through Greater Manchester and Lancashire before joining the River Mersey, is one of northwest England’s most urban but steadily improving waterways. Its temperature reflects the region’s temperate, maritime climate and the balance between upland sources and city sections. In winter, the Irwell usually measures between 4 and 6°C (39–43°F), staying cold and fast-moving after rainfall. By spring, it warms gradually to around 8–10°C (46–50°F). During midsummer, particularly in July and August, the water can reach 16–18°C (61–64°F) in sheltered areas, though shaded or canal-fed sections remain cooler. As autumn approaches, temperatures fall again to about 10–12°C (50–54°F), keeping a steady, refreshing feel through most of the year.
Swimming in the River Irwell is permitted but best suited to experienced wild swimmers familiar with urban rivers. Water quality has improved in recent decades, yet caution is still needed because of uneven depths and occasional strong currents. Many prefer to enjoy the river from its paths and green spaces, such as Peel Park and Clifton Country Park, where access to the water is easy but safe. The Irwell also passes cultural and historic landmarks through Salford and Manchester, offering a mix of natural recovery and industrial heritage along its winding course.