All data are in degrees Fahrenheit

en

Water temperature in Trondheim

Detailed information about the current water temperature in Trondheim. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in Trondheim now

44.9

°F

April 17, 14:57

Trend:

increasing

Yesterday:

44.2°F

Tomorrow:

45.4°F

Sunrise:

05:44

Sunset:

20:54

Day Length:

15 h. 10 min.

Trondheim in April

Minimum:

40.1°F

Average:

42.6°F

Maximum:

43.5°F

Sea water temperature in Trondheim today

As of now, in Trondheim, the water temperature is 44.9°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 3.0°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to rise a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 43.2°F on 2016, while the historical minimum was 40.1°F on 2019.

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 46.2°F, with minimum temperature starting at 45.4°F, while the maximum might reach 47.0°F.

Daily water temperature in Trondheim

Date Current Year

actual* / forecast**

last year 10 years average
Apr 3 42.6°F 40.8°F 41.0°F
Apr 4 42.7°F 41.4°F 41.3°F
Apr 5 42.6°F 41.5°F 41.4°F
Apr 6 42.4°F 41.6°F 41.5°F
Apr 7 42.5°F 42.1°F 41.7°F
Apr 8 42.9°F 40.4°F 41.4°F
Apr 9 42.9°F 41.8°F 41.5°F
Apr 10 44.1°F 41.9°F 41.8°F
Apr 11 43.7°F 42.0°F 42.0°F
Apr 12 43.7°F 42.3°F 42.1°F
Apr 13 44.3°F 43.0°F 42.2°F
Apr 14 44.6°F 42.8°F 42.3°F
Apr 15 43.7°F 42.3°F 42.1°F
Apr 16 44.2°F 43.1°F 42.2°F
Apr 17 44.9°F 41.7°F 41.9°F
Apr 18 45.4°F 43.3°F 42.4°F
Apr 19 45.4°F 43.2°F 42.4°F
Apr 20 46.1°F 45.1°F 43.2°F
Apr 21 46.2°F 42.5°F 43.2°F
Apr 22 46.4°F 43.2°F 43.4°F
Apr 23 46.9°F 44.5°F 43.9°F
Apr 24 47.0°F 44.5°F 44.0°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Trondheim by month

In an average year, Trondheim offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Trondheim was recorded on July 24, 2025, reaching a 71.6°F. While the coldest temperature occurred on March 16, 2022, dipping to 34.1°F. The average readings by season are 41.7°F in Winter, 43.9°F in Spring, 58.7°F in Summer, and 50.4°F in Autumn.