Strängnäs — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Strängnäs, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Strängnäs today is 18.7°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 24 | 17.9°C | 22.0°C | |
| AUG 25 | 17.9°C | 22.0°C | |
| AUG 26 | 17.9°C | 22.0°C | |
| AUG 27 | 17.9°C | 22.0°C | |
| AUG 28 | 18.1°C | 22.0°C | |
| AUG 29 | 18.1°C | 22.0°C | |
| AUG 30 | 18.1°C | 22.0°C | |
| AUG 31 | 18.1°C | 22.0°C | |
| SEP 1 | 18.0°C | 18.7°C | |
| SEP 2 | 18.0°C | 18.6°C | |
| SEP 3 | 18.0°C | 18.6°C | |
| SEP 4 | 18.0°C | 18.6°C | |
| SEP 5 | 18.0°C | 18.5°C | |
| SEP 6 | 18.0°C | 18.5°C | |
| SEP 7 | 18.0°C | 18.5°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 | 0°C | 3°C | 6°C |
| February | 0°C | 3°C | 6°C |
| March | 0°C | 4°C | 7°C |
| April | 3°C | 7°C | 11°C |
| May | 7°C | 12°C | 18°C |
| June | 12°C | 19°C | 24°C |
| July | 16°C | 22°C | 27°C |
| August | 17°C | 22°C | 27°C |
| September | 12°C | 18°C | 23°C |
| October | 7°C | 11°C | 14°C |
| November | 3°C | 7°C | 10°C |
| December | 0°C | 4°C | 7°C |
Strängnäs: Weather Forecast
September 1
September 2
September 3
September 4
Location & Local Information
Strängnäs sits on the shores of Lake Mälaren in Södermanland, and water temperatures follow a clear seasonal pattern. In winter the surface is typically close to freezing, around 0–4 °C (32–39 °F), often with ice in the coldest months. Spring sees a gradual rise, roughly 2–12 °C (36–54 °F) as the ice melts and the water stratifies. Early summer brings milder conditions of about 12–18 °C (54–64 °F), while peak summer temperatures in July and August commonly reach 18–22 °C (64–72 °F) in sheltered bays during warm years. By autumn the surface cools again to about 10–15 °C (50–59 °F) as the water mixes and loses heat.
Swimming in and around Strängnäs is generally allowed; Swedish access rights and local bathing spots make the lake reachable for recreational use. Municipalities often monitor popular beaches for bathing water quality in summer, so swimmers should heed local advisories about bacterial levels or cyanobacteria blooms and avoid stagnant, shallow bays when warnings are posted. Cold‑water and ice swimming are practiced by some, but require appropriate safety measures such as companions, flotation aids or cut‑out ice facilities. Boat traffic and variable depths also call for caution even at warmer temperatures.