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 9.2°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.

48.6

°F

October 20, 03:20

Trend:

decreasing

Yesterday:

48.6°F

Tomorrow:

48.2°F

Sunrise:

08:20

Sunset:

17:45

Day Length:

9 h. 25 min.

Trondheim in October

Minimum:

37.5°F

Average:

41.1°F

Maximum:

43.4°F

Sea water temperature in Trondheim today

As of now, in Trondheim, the water temperature is 48.6°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 1.1°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 fall a bit.

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 is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 51.0°F on 2017, while the historical minimum was 48.1°F on 2022.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 47.6°F, the minimum temperature may reach 46.9°F, and the maximum might stay at 48.2°F.

Daily water temperature in Trondheim

Date	Current Year actual* / forecast**	last year	10 years average
Oct 6	51.7°F	53.3°F	51.9°F
Oct 7	52.1°F	52.8°F	51.7°F
Oct 8	51.7°F	52.4°F	51.5°F
Oct 9	51.2°F	52.6°F	51.2°F
Oct 10	51.0°F	52.3°F	51.0°F
Oct 11	50.6°F	52.4°F	50.8°F
Oct 12	50.5°F	52.2°F	50.7°F
Oct 13	50.1°F	52.4°F	50.7°F
Oct 14	50.2°F	51.3°F	50.5°F
Oct 15	49.6°F	52.2°F	50.1°F
Oct 16	49.3°F	51.5°F	50.0°F
Oct 17	49.2°F	51.6°F	50.2°F
Oct 18	49.1°F	51.4°F	50.1°F
Oct 19	48.6°F	51.1°F	49.7°F
Oct 20	48.6°F	50.5°F	49.7°F
Oct 21	48.2°F	50.1°F	49.3°F
Oct 22	48.0°F	49.5°F	49.1°F
Oct 23	48.0°F	47.9°F	49.1°F
Oct 24	47.6°F	49.0°F	48.7°F
Oct 25	47.2°F	48.6°F	48.3°F
Oct 26	47.2°F	48.3°F	48.3°F
Oct 27	46.9°F	48.3°F	48.0°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, 58.6°F in Summer, and 50.4°F in Autumn.