Water temperature in Alert

This data the coastal Alert sea water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current sea temperature in Alert

Water temperature in Alert today is -1.3°C. Based on our historical data over a period of ten years, the warmest water in this day in Alert was recorded in 2019 and was -1.1°C, and the coldest was recorded in 2014 at -1.9°C. Sea water temperature in Alert is expected to drop to -1.7°C in the next 10 days. September average water temperature in Alert is -1.7°C, the minimum temperature is -2°C, and the maximum is -0.3°C.

Throughout the year, the water temperature in Alert does not rise above 20°C and therefore is not suitable for comfortable swimming. The average water temperature in Alert in winter reaches -1.8°C, in spring -1.7°C, in summer the average temperature rises to -1.2°C, and in autumn it is -1.8°C.

Alert water temperature now

The sea salinity in Alert is 31.30‰, and the average salinity of the World Ocean is 35‰.

Current temperature and weather

Data in a table show Alert temperature today (6 September 2025). For more information and forecast for a few days, go to the weather forecast Alert.

0-3 h	3-6 h	6-9 h	9-12 h
-4.8°C	-4.8°C	-3°C	-2.3°C

12-15 h	15-18 h	18-21 h	21-24 h
-2°C	-2.3°C	-3.4°C	-3.9°C

Alert water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Alert. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Alert on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Alert

The nearest beaches and cities from Alert with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Qaanaaq	1.9°C	0°C		0.05 m
Thule	1.5°C	-1°C		0.06 m
Grise Fiord	0.7°C	-3°C
Upernavik	3.3°C	1°C		0.62 m
Resolute	0.3°C	-3°C
Clavering Island	5.3°C	3°C		0.49 m
Ny-Alesund	6.2°C	8°C		0.22 m
Uummannaq	3.8°C	1°C		0.2 m
Longyearbyen	8.1°C	8°C		0.16 m
Ilulissat	3.1°C	0°C		0.25 m

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Our report for Alert is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.