Lagan River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Lagan River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Lagan River today is 18.4°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 23 | 16.5°C | 19.0°C | |
| JUN 24 | 16.5°C | 19.0°C | |
| JUN 25 | 16.5°C | 19.0°C | |
| JUN 26 | 17.3°C | 19.0°C | |
| JUN 27 | 17.3°C | 19.0°C | |
| JUN 28 | 17.3°C | 19.0°C | |
| JUN 29 | 18.4°C | 19.0°C | |
| JUN 30 | 18.4°C | 19.0°C | |
| JUL 1 | 18.0°C | 18.4°C | |
| JUL 2 | 18.0°C | 18.4°C | |
| JUL 3 | 18.0°C | 18.3°C | |
| JUL 4 | 18.0°C | 18.3°C | |
| JUL 5 | 18.0°C | 18.3°C | |
| JUL 6 | 18.0°C | 18.3°C | |
| JUL 7 | 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 | 2°C | 5°C |
| February | 0°C | 2°C | 5°C |
| March | 1°C | 5°C | 8°C |
| April | 4°C | 8°C | 10°C |
| May | 7°C | 11°C | 16°C |
| June | 15°C | 19°C | 24°C |
| July | 14°C | 18°C | 23°C |
| August | 12°C | 17°C | 21°C |
| September | 9°C | 14°C | 18°C |
| October | 6°C | 9°C | 12°C |
| November | 3°C | 7°C | 9°C |
| December | 0°C | 4°C | 7°C |
Lagan River: Water Temperature by Location
Lagan River: Weather Forecast
July 1
July 2
July 3
July 4
Location & Local Information
Source Tahesjön
• location Jönköping Municipality, Sweden
Mouth Laholmsbukten, Kattegat
• coordinates 56°32′55″N 12°56′50″E
• elevation 0 m (0 ft)
Length 244 km (152 mi)
The river Lagan (Swedish: Lagan) in Halland County shows typical Nordic river temperature patterns: winter water temperatures commonly hover close to freezing, about 0–3 °C (32–37 °F), as ice and cold air cool surface waters. During spring and the snowmelt period temperatures usually rise to roughly 3–10 °C (37–50 °F). In summer, sheltered and slow-flowing stretches can warm to about 15–22 °C (59–72 °F), and on unusually warm summers shallow sections may briefly reach the mid-20s °C (around 75 °F); autumn cooling generally brings temperatures back to about 8–14 °C (46–57 °F). Actual readings vary with flow, depth, shading, recent weather and upstream reservoir releases, so local conditions can differ from these typical ranges.
Swimming in Lagan is generally permitted and commonly practiced at popular bathing spots and along accessible banks, though there are no universal rules for every location. Safety and suitability depend on currents, underwater obstacles, visibility and local water quality; some stretches have stronger flows that make swimming risky. Municipalities and local authorities sometimes post advisories or close specific sites if bacterial counts or other hazards are detected, so it is advisable to check local notices, choose established bathing areas, and use caution when entering the river.