Semois River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Semois River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Semois River today is 50°F.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 47°F (8°C) to 50°F (10°C). This is still cool water, suitable only for experienced swimmers or those accustomed to cold water. Swimming in such conditions is possible, but not recommended for prolonged periods. Extra caution should be taken during extended exposure, as the cold water can cause heat loss and lead to hypothermia. For added comfort, special clothing can be used. 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 |
|---|---|---|---|
| MAY 10 | 53°F | 55°F | |
| MAY 11 | 53°F | 55°F | |
| MAY 12 | 53°F | 55°F | |
| MAY 13 | 51°F | 55°F | |
| MAY 14 | 51°F | 55°F | |
| MAY 15 | 51°F | 55°F | |
| MAY 16 | 50°F | 55°F | |
| MAY 17 | 50°F | 55°F | |
| MAY 18 | 55°F | 50°F | |
| MAY 19 | 55°F | 50°F | |
| MAY 20 | 55°F | 51°F | |
| MAY 21 | 55°F | 51°F | |
| MAY 22 | 55°F | 51°F | |
| MAY 23 | 55°F | 51°F | |
| MAY 24 | 55°F | 52°F |
* 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 | 37°F | 45°F | 48°F |
| February | 36°F | 43°F | 48°F |
| March | 41°F | 48°F | 52°F |
| April | 45°F | 51°F | 57°F |
| May | 48°F | 55°F | 64°F |
| June | 54°F | 63°F | 70°F |
| July | 55°F | 64°F | 72°F |
| August | 57°F | 64°F | 73°F |
| September | 54°F | 63°F | 70°F |
| October | 48°F | 54°F | 59°F |
| November | 41°F | 48°F | 52°F |
| December | 37°F | 45°F | 48°F |
Semois River: Water Temperature by Location
Semois River: Weather Forecast
May 18
May 19
May 20
May 21
May 22
Location & Local Information
Source:
• location Arlon
• coordinates 49°40′54″N 5°49′13″E
• elevation 410 m (1,350 ft)
Mouth:
• location Monthermé
• coordinates 49°52′50″N 4°44′18″E
Length 210 km (130 mi)
Basin size 1,329 km2 (513 sq mi)
The Semois River, which flows through both France and Belgium, is known for its scenic beauty and tranquil waters, making it a popular spot for swimming during the warmer months. In the summer, water temperatures typically range from 18-22°C (64-72°F), which is comfortable for swimming in areas where the water is calm and the current is gentle. The river’s slower-flowing sections provide ideal spots for swimmers, especially in designated swimming areas or secluded pools. However, in the cooler seasons, the water temperature can drop, making swimming less appealing. It is advisable to check the local water conditions before swimming, as temperature changes can occur depending on the weather.