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 5.26°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.

41.5

°F

April 15, 04:11

Trend:

stable

Yesterday:

41.3°F

Tomorrow:

41.4°F

Sunrise:

06:00

Sunset:

21:02

Day Length:

15 h. 2 min.

Keflavík in April

Minimum:

39.0°F

Average:

40.6°F

Maximum:

43.0°F

Sea water temperature in Keflavík today

As of now, in Keflavík, the water temperature is 41.5°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. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming 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 42.7°F on 2025, while the historical minimum was 40.0°F on 2021.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 41.8°F, with minimum temperature starting at 41.4°F, while the maximum might reach 42.4°F.

Daily water temperature in Keflavík

Date	Current Year actual* / forecast**	last year	10 years average
Apr 1	39.5°F	42.4°F	40.5°F
Apr 2	39.8°F	42.4°F	40.5°F
Apr 3	39.9°F	42.7°F	40.4°F
Apr 4	40.5°F	42.4°F	40.6°F
Apr 5	40.3°F	43.3°F	40.7°F
Apr 6	40.5°F	43.2°F	40.8°F
Apr 7	40.5°F	43.0°F	40.8°F
Apr 8	40.9°F	42.8°F	40.8°F
Apr 9	40.9°F	42.6°F	40.8°F
Apr 10	40.9°F	41.7°F	40.8°F
Apr 11	41.0°F	43.2°F	41.1°F
Apr 12	40.6°F	43.1°F	41.0°F
Apr 13	41.1°F	42.7°F	41.0°F
Apr 14	41.3°F	43.1°F	41.2°F
Apr 15	41.5°F	42.7°F	41.3°F
Apr 16	41.4°F	43.0°F	41.2°F
Apr 17	41.4°F	43.0°F	41.3°F
Apr 18	41.7°F	42.8°F	41.6°F
Apr 19	41.7°F	42.8°F	41.6°F
Apr 20	42.0°F	42.7°F	41.8°F
Apr 21	42.3°F	43.1°F	42.1°F
Apr 22	42.4°F	43.3°F	42.3°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, 42.3°F in Spring, 51.0°F in Summer, and 47.5°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Álftanes	38.3°F	18mi
Hafnarfjörður	38.2°F	19mi
Kópavogur	38.2°F	21mi
Reykjavík	38.1°F	22mi
Akranes	37.8°F	26mi

* current water temperature in this city

** straight line distance from Keflavík