What is the current water temperature in Trondheim?

Q: What is the current water temperature in Trondheim?

As of now, in Trondheim, the water temperature is 5.56°C. 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.

Norway > Trondheim

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.

42.0

°F

December 17, 14:13

Trend:

stable

Yesterday:

42.0°F

Tomorrow:

41.9°F

Sunrise:

09:58

Sunset:

14:31

Day Length:

4 h. 33 min.

Trondheim in December

Minimum:

38.2°F

Average:

40.7°F

Maximum:

42.8°F

Sea water temperature in Trondheim today

As of now, in Trondheim, the water temperature is 42.0°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 0.5°F lower than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 44.1°F on 2020, while the historical minimum was 39.5°F on 2023.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 42.3°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Trondheim

Date	Current Year actual* / forecast**	last year	10 years average
Dec 3	45.2°F	43.3°F	44.5°F
Dec 4	43.1°F	43.3°F	44.1°F
Dec 5	43.7°F	43.2°F	44.0°F
Dec 6	43.1°F	42.6°F	43.7°F
Dec 7	43.8°F	42.2°F	43.7°F
Dec 8	42.7°F	42.2°F	43.8°F
Dec 9	43.3°F	42.2°F	43.5°F
Dec 10	43.1°F	39.4°F	43.1°F
Dec 11	40.2°F	44.0°F	43.2°F
Dec 12	41.1°F	43.2°F	43.2°F
Dec 13	41.5°F	43.3°F	42.7°F
Dec 14	41.7°F	43.2°F	42.5°F
Dec 15	42.0°F	42.3°F	42.4°F
Dec 16	42.0°F	42.6°F	42.1°F
Dec 17	42.0°F	42.9°F	42.5°F
Dec 18	41.9°F	42.7°F	42.5°F
Dec 19	42.4°F	42.5°F	42.9°F
Dec 20	42.5°F	42.6°F	43.0°F
Dec 21	42.5°F	42.6°F	43.0°F
Dec 22	42.5°F	42.6°F	43.0°F
Dec 23	42.2°F	42.5°F	42.7°F
Dec 24	42.1°F	42.4°F	42.6°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 41.6°F in Winter, 43.7°F in Spring, 58.4°F in Summer, and 50.4°F in Autumn.