Water temperature in Keflavik

This data the coastal Keflavik 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 Keflavik

Water temperature in Keflavik today is 10.3°C. Based on our historical data over a period of ten years, the warmest water in this day in Keflavik was recorded in 2010 and was 10.6°C, and the coldest was recorded in 2013 at 8.1°C. Sea water temperature in Keflavik is expected to drop to 8.8°C in the next 10 days. September average water temperature in Keflavik is 10.3°C, the minimum temperature is 8.1°C, and the maximum is 12.1°C.

Throughout the year, the water temperature in Keflavik does not rise above 20°C and therefore is not suitable for comfortable swimming. The average water temperature in Keflavik in winter reaches 4.7°C, in spring 5.6°C, in summer the average temperature rises to 10.8°C, and in autumn it is 8.4°C.

Keflavik water temperature now

The sea salinity in Keflavik is 34.65‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Keflavik 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 Keflavik. 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 Keflavik. Data in table shown for 28 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Keflavik

Keflavik weather forecast

Current temperature and weather

Data in a table show Keflavik temperature today (28 September 2025). For more information and forecast for a few days, go to the weather forecast Keflavik.

0-3 h	3-6 h	6-9 h	9-12 h
9°C	8.7°C	9°C	8.4°C

12-15 h	15-18 h	18-21 h	21-24 h
9°C	9.4°C	9.7°C	9.9°C

Keflavik water temperature by month

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

The nearest beaches and cities from Keflavik 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
Njardvik	10.2°C	9°C		1.13 m
Sandgerdi	10.5°C	9°C		1.26 m
Kopavogur	10.8°C	9°C		0.67 m
Akranes	10.2°C	9°C		0.83 m
Borgarnes	9.2°C	9°C		0.81 m
Stykkisholmur	8.7°C	9°C		0.43 m
Isafjoerdur	9°C	9°C		0.63 m
Akureyri	7.6°C	9°C		0.54 m
Dalvik	7.7°C	9°C		0.54 m
Skjalfandi Bay	7.9°C	8°C		0.54 m

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Our report for Keflavik 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.