Measurements:
°C
°F
Trondheim
30°F
NW 4 mph
Feels like: 26°F
Precip: 0%
World Resorts Norway Trondheim Weather

Trondheim Sea Water Temperature

Current Sea Water Temperature:
+35.8°F
Maximum Sea Water Temperature in March: 42.6°F
Minimum Sea Water Temperature in March: 32.4°F
Average water temperature in March: 39.1°F

Sea Water Temperature for the Last 10 Days:

March 09 35.8°F March 04 41.0°F
March 08 40.4°F March 03 40.0°F
March 07 40.0°F March 02 37.6°F
March 06 40.4°F March 01 39.0°F
March 05 40.6°F February 28 41.2°F

When is the Warmest Sea for Trondheim?

According to our data for the last three years for Trondheim the highest average sea water temperature was in July, August and September.

Average Water Temperature by Month, °F

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Trondheim was 65.1°F. The maximum and minimum values were 56.2°F and 74.0°F respectively.

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Trondheim was 61.1°F. The maximum and minimum values were 56.0°F and 69.6°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Trondheim was 56.7°F. The maximum and minimum values were 52.6°F and 60.4°F respectively.

Best Time to Visit Trondheim
The most sunny months:
July 8 days
May 8 days
August 8 days
The most warm months:
July 65.4 °F
August 63.4 °F
June 60.0 °F
Warmest sea temperature:
July 60.5 °F
August 60.4 °F
September 55.5 °F
The most cold months:
January 24.1 °F
February 27.2 °F
December 27.4 °F
The most rainy months:
September 6 days
March 5 days
July 5 days
The most windy months:
January 8 mph
December 7 mph
March 7 mph

Trondheim on the Weather Map

Norway Resorts:
NAME
Ålesund +42
Bergen +40
Flam +30
Hemsedal +30
Holmenkollen +30
Lillehammer +28
Oslo +30
Stavanger +40
Tromse +34
Trondheim +30
24 Hours Weather Forecast
Trondheim
Local time: 02:08
10 mar, tuesday
0300 30°F
NW
4 mph
0600 32°F
NW
5 mph
0900 34°F
NW
3 mph
1200 36°F
W
2 mph
1500 38°F
W
2 mph
1800 34°F
NW
3 mph
2100 32°F
W
4 mph
11 mar, wednesday
0000 30°F
W
5 mph