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 4.87°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.

40.8

°F

January 19, 06:05

Trend:

decreasing

Yesterday:

41.5°F

Tomorrow:

40.7°F

Sunrise:

09:30

Sunset:

15:30

Day Length:

6 h. 0 min.

Trondheim in January

Minimum:

41.1°F

Average:

42.8°F

Maximum:

44.6°F

Sea water temperature in Trondheim today

As of now, in Trondheim, the water temperature is 40.8°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 0.2°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 considerably 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 43.2°F on 2022, while the historical minimum was 37.9°F on 2021.

latest data

last year

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. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 41.1°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
Jan 5	43.3°F	42.6°F	42.2°F
Jan 6	43.3°F	42.4°F	41.9°F
Jan 7	40.8°F	42.2°F	41.0°F
Jan 8	41.2°F	40.2°F	40.8°F
Jan 9	43.8°F	40.0°F	40.7°F
Jan 10	43.4°F	40.1°F	41.1°F
Jan 11	43.5°F	40.2°F	41.2°F
Jan 12	43.3°F	39.2°F	41.0°F
Jan 13	43.7°F	39.3°F	41.4°F
Jan 14	43.3°F	39.7°F	41.9°F
Jan 15	43.4°F	40.0°F	42.1°F
Jan 16	42.9°F	42.2°F	41.9°F
Jan 17	42.8°F	41.6°F	41.6°F
Jan 18	41.5°F	42.6°F	41.7°F
Jan 19	40.8°F	42.5°F	41.0°F
Jan 20	40.7°F	43.4°F	40.9°F
Jan 21	40.9°F	43.2°F	41.1°F
Jan 22	41.2°F	43.0°F	41.4°F
Jan 23	41.3°F	42.9°F	41.5°F
Jan 24	41.1°F	42.7°F	41.3°F
Jan 25	41.4°F	43.3°F	41.6°F
Jan 26	41.2°F	43.0°F	41.5°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, 43.8°F in Spring, 58.7°F in Summer, and 50.4°F in Autumn.