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 7.17°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.

44.9

°F

December 28, 21:22

Trend:

stable

Yesterday:

44.9°F

Tomorrow:

45.1°F

Sunrise:

10:02

Sunset:

14:38

Day Length:

4 h. 36 min.

Trondheim in January

Minimum:

41.1°F

Average:

42.5°F

Maximum:

44.6°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 2.8°F higher 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 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 44.1°F on 2020, while the historical minimum was 38.6°F on 2024.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the histoorical minimum and others when it was close to the historical maximum. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 45.3°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
Jan 1	45.3°F	42.2°F	42.5°F
Jan 2	45.4°F	42.2°F	42.6°F
Jan 3	45.4°F	42.1°F	42.6°F
Jan 4	45.2°F	42.5°F	42.4°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	42.0°F	42.7°F	42.4°F
Dec 19	41.3°F	42.5°F	42.8°F
Dec 20	42.2°F	42.6°F	42.9°F
Dec 21	43.6°F	42.6°F	43.1°F
Dec 22	43.5°F	42.6°F	43.0°F
Dec 23	42.5°F	42.5°F	42.7°F
Dec 24	42.9°F	42.4°F	42.7°F
Dec 25	43.3°F	42.4°F	42.7°F
Dec 26	44.5°F	42.4°F	42.8°F
Dec 27	44.9°F	41.1°F	42.6°F
Dec 28	44.9°F	38.6°F	42.1°F
Dec 29	45.1°F	40.2°F	42.3°F
Dec 30	45.2°F	40.6°F	42.4°F
Dec 31	45.4°F	42.5°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.