What is the current water temperature in Keflavík?

Q: What is the current water temperature in Keflavík?

As of now, in Keflavík, the water temperature is 10.67°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.

Iceland > Keflavík

Water temperature in Keflavík

Detailed information about the current water temperature in Keflavík. 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.

51.2

°F

September 14, 06:07

Trend:

decreasing

Yesterday:

51.2°F

Tomorrow:

51.1°F

Sunrise:

06:49

Sunset:

20:01

Day Length:

13 h. 12 min.

Keflavík in September

Minimum:

38.9°F

Average:

40.3°F

Maximum:

42.1°F

Sea water temperature in Keflavík today

As of now, in Keflavík, the water temperature is 51.2°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 about the same as 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 also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 52.4°F on 2025, while the historical minimum was 49.0°F on 2024.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 50.7°F, the minimum temperature may reach 50.4°F, and the maximum might stay at 51.1°F.

Daily water temperature in Keflavík

Date	Current Year actual* / forecast**	last year	10 years average
Aug 31	53.0°F	54.3°F	52.4°F
Sep 1	52.8°F	53.9°F	52.3°F
Sep 2	52.3°F	53.8°F	52.2°F
Sep 3	52.4°F	54.2°F	52.0°F
Sep 4	52.1°F	53.9°F	51.9°F
Sep 5	51.9°F	53.1°F	51.9°F
Sep 6	52.2°F	53.1°F	51.7°F
Sep 7	52.3°F	52.8°F	51.7°F
Sep 8	52.2°F	52.8°F	51.7°F
Sep 9	52.3°F	52.7°F	51.7°F
Sep 10	51.9°F	52.4°F	51.5°F
Sep 11	51.7°F	51.9°F	51.3°F
Sep 12	51.6°F	51.9°F	51.2°F
Sep 13	51.2°F	51.9°F	51.1°F
Sep 14	51.2°F	52.4°F	51.0°F
Sep 15	51.1°F	52.1°F	50.9°F
Sep 16	50.9°F	52.1°F	50.8°F
Sep 17	50.8°F	51.9°F	50.6°F
Sep 18	50.7°F	51.8°F	50.6°F
Sep 19	50.7°F	51.6°F	50.5°F
Sep 20	50.5°F	51.3°F	50.3°F
Sep 21	50.4°F	51.0°F	50.2°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 Keflavík by month

In an average year, Keflavík offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in Keflavík was recorded on August 6, 2019, reaching a 56.1°F. While the coldest temperature occurred on February 9, 2024, dipping to 36.3°F. The average readings by season are 40.4°F in Winter, 42.2°F in Spring, 51.0°F in Summer, and 47.5°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Álftanes	51.7°F	18mi
Hafnarfjörður	51.6°F	19mi
Kópavogur	51.6°F	21mi
Reykjavík	51.5°F	22mi
Akranes	51.4°F	26mi

* current water temperature in this city

** straight line distance from Keflavík