Chelmarsh Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Chelmarsh Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Chelmarsh Reservoir 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 26 | 18.7°C | 22.0°C | |
| AUG 27 | 18.7°C | 22.0°C | |
| AUG 28 | 18.7°C | 22.0°C | |
| AUG 29 | 18.7°C | 22.0°C | |
| AUG 30 | 18.7°C | 22.0°C | |
| AUG 31 | 18.7°C | 22.0°C | |
| SEP 1 | 18.0°C | 18.0°C | |
| SEP 2 | 18.5°C | 18.0°C | |
| SEP 3 | 18.0°C | 18.5°C | |
| SEP 4 | 18.0°C | 18.5°C | |
| SEP 5 | 18.0°C | 18.4°C | |
| SEP 6 | 18.0°C | 18.4°C | |
| SEP 7 | 18.0°C | 18.4°C | |
| SEP 8 | 18.0°C | 18.4°C | |
| SEP 9 | 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 | 0°C | 4°C | 7°C |
| February | 1°C | 5°C | 8°C |
| March | 3°C | 7°C | 10°C |
| April | 7°C | 11°C | 14°C |
| May | 10°C | 17°C | 23°C |
| June | 13°C | 20°C | 26°C |
| July | 17°C | 22°C | 27°C |
| August | 17°C | 22°C | 27°C |
| September | 12°C | 18°C | 23°C |
| October | 9°C | 13°C | 17°C |
| November | 4°C | 8°C | 11°C |
| December | 1°C | 5°C | 8°C |
Chelmarsh Reservoir: Water Temperature by Location
Chelmarsh Reservoir: Weather Forecast
September 3
September 4
September 5
September 6
September 7
Location & Local Information
#Shropshire
Chelmarsh Reservoir’s water temperature follows a typical temperate pattern, cooling through autumn and winter and warming in late spring and summer. Surface temperatures in winter commonly sit around 4–7 °C (39–45 °F), rising through spring to roughly 8–13 °C (46–55 °F). In warmer spells during June to August the reservoir can reach about 15–20 °C (59–68 °F) at the surface, while autumn typically sees a decline back toward the single digits, around 8–12 °C (46–54 °F). Deeper water stays colder year-round, so actual conditions vary by depth, time of day and weather.
Open water swimming at Chelmarsh is generally not permitted because it is a working reservoir and restrictions are in place for safety and water quality; access is directed toward organised activities such as sailing and angling run by local clubs. Visitors who want outdoor water experiences nearby often head to supervised lidos or designated swim events in the region. The reservoir is close to the market town of Bridgnorth, the Severn Valley Railway and the industrial heritage of Ironbridge Gorge, making the area attractive for walking, birdwatching and day trips as well as water-sport spectating.