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 4.37°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.

39.9

°F

March 25, 12:01

Trend:

stable

Yesterday:

39.9°F

Tomorrow:

40.0°F

Sunrise:

07:15

Sunset:

20:00

Day Length:

12 h. 45 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 39.9°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 0.6°F lower than 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 rise a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. 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 42.5°F on 2025, while the historical minimum was 37.4°F on 2023.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 39.9°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Keflavík

Date	Current Year actual* / forecast**	last year	10 years average
Mar 11	39.8°F	40.0°F	39.7°F
Mar 12	39.8°F	40.1°F	39.7°F
Mar 13	39.8°F	40.4°F	39.6°F
Mar 14	39.2°F	40.9°F	39.8°F
Mar 15	39.2°F	40.6°F	39.7°F
Mar 16	39.3°F	40.0°F	39.7°F
Mar 17	39.5°F	41.1°F	39.9°F
Mar 18	39.6°F	40.9°F	39.9°F
Mar 19	39.6°F	41.8°F	40.0°F
Mar 20	39.6°F	41.7°F	39.9°F
Mar 21	39.6°F	42.1°F	40.1°F
Mar 22	39.6°F	42.0°F	40.1°F
Mar 23	39.8°F	42.0°F	40.2°F
Mar 24	39.9°F	41.8°F	40.4°F
Mar 25	39.9°F	42.5°F	40.5°F
Mar 26	40.0°F	42.3°F	40.6°F
Mar 27	39.9°F	42.2°F	40.5°F
Mar 28	39.9°F	42.6°F	40.5°F
Mar 29	39.9°F	42.1°F	40.5°F
Mar 30	39.9°F	42.8°F	40.5°F
Mar 31	40.0°F	42.5°F	40.6°F
Apr 1	40.0°F	42.4°F	40.6°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	36.5°F	18mi
Hafnarfjörður	36.5°F	19mi
Kópavogur	36.5°F	21mi
Reykjavík	36.4°F	22mi
Akranes	36.1°F	26mi

* current water temperature in this city

** straight line distance from Keflavík