Water temperature in Seltjarnarnes

This data the coastal Seltjarnarnes 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 Seltjarnarnes

Water temperature in Seltjarnarnes today is 13.1°C. Based on our historical data over a period of ten years, the warmest water in this day in Seltjarnarnes was recorded in 2016 and was 11.8°C, and the coldest was recorded in 2015 at 9.9°C. Sea water temperature in Seltjarnarnes is expected to drop to 10.2°C in the next 10 days. September average water temperature in Seltjarnarnes is 10.2°C, the minimum temperature is 4.6°C, and the maximum is 12°C.

Throughout the year, the water temperature in Seltjarnarnes does not rise above 20°C and therefore is not suitable for comfortable swimming. The average water temperature in Seltjarnarnes in winter reaches 3.6°C, in spring 5°C, in summer the average temperature rises to 11.1°C, and in autumn it is 8.1°C.

Seltjarnarnes water temperature now

The sea salinity in Seltjarnarnes is 34.57‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Seltjarnarnes for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Seltjarnarnes. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Seltjarnarnes. Data in table shown for 6 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Seltjarnarnes

Seltjarnarnes weather forecast

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
8.1°C	7.4°C	7.8°C	9.1°C

12-15 h	15-18 h	18-21 h	21-24 h
10.7°C	11.2°C	10.9°C	9.2°C

Seltjarnarnes water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Seltjarnarnes. 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 Seltjarnarnes 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 Seltjarnarnes

The nearest beaches and cities from Seltjarnarnes 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
Kopavogur	13.5°C	11°C		0.64 m
Alftanes	13.1°C	11°C		0.64 m
Akranes	12°C	11°C		0.84 m
Njardvik	11.7°C	11°C		1.08 m
Keflavik	11.7°C	11°C		1.4 m
Sandgerdi	11.7°C	11°C		1.18 m
Grindavik	12°C	11°C		1.55 m
Torlakshofn	11.9°C	11°C		1.61 m
Borgarnes	11.7°C	11°C		0.81 m
Stykkisholmur	11.2°C	11°C		0.33 m

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Our report for Seltjarnarnes 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.