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 11.3°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.

52.3

°F

October 10, 22:31

Trend:

decreasing

Yesterday:

52.6°F

Tomorrow:

52.0°F

Sunrise:

07:51

Sunset:

18:19

Day Length:

10 h. 28 min.

Trondheim in October

Minimum:

37.5°F

Average:

40.7°F

Maximum:

42.5°F

Sea water temperature in Trondheim today

As of now, in Trondheim, the water temperature is 52.3°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 1.6°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 fall a bit.

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 is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 52.3°F on 2017, while the historical minimum was 49.9°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. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 51.8°F, the minimum temperature may reach 51.4°F, and the maximum might stay at 52.1°F.

Daily water temperature in Trondheim

Date	Current Year actual* / forecast**	last year	10 years average
Sep 26	52.4°F	54.1°F	53.4°F
Sep 27	53.0°F	53.7°F	53.4°F
Sep 28	53.1°F	53.4°F	53.1°F
Sep 29	52.9°F	53.2°F	53.0°F
Sep 30	53.1°F	52.7°F	52.9°F
Oct 1	52.4°F	52.6°F	52.8°F
Oct 2	53.0°F	50.9°F	52.6°F
Oct 3	52.9°F	50.8°F	52.3°F
Oct 4	52.6°F	50.8°F	52.2°F
Oct 5	53.3°F	50.7°F	52.0°F
Oct 6	53.3°F	50.5°F	51.7°F
Oct 7	52.8°F	50.3°F	51.5°F
Oct 8	52.4°F	50.4°F	51.4°F
Oct 9	52.6°F	50.1°F	51.2°F
Oct 10	52.3°F	49.9°F	50.8°F
Oct 11	52.0°F	50.1°F	50.4°F
Oct 12	51.9°F	50.7°F	50.4°F
Oct 13	52.1°F	50.6°F	50.5°F
Oct 14	51.9°F	50.6°F	50.3°F
Oct 15	51.5°F	49.1°F	49.9°F
Oct 16	51.4°F	49.2°F	49.9°F
Oct 17	51.6°F	49.3°F	50.0°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 41.6°F in Winter, 43.7°F in Spring, 58.4°F in Summer, and 50.4°F in Autumn.