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 7.22°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.

45.0

°F

May 17, 15:40

Trend:

increasing

Yesterday:

44.6°F

Tomorrow:

45.1°F

Sunrise:

04:11

Sunset:

22:43

Day Length:

18 h. 32 min.

Keflavík in May

Minimum:

38.6°F

Average:

40.4°F

Maximum:

42.8°F

Sea water temperature in Keflavík today

As of now, in Keflavík, the water temperature is 45.0°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 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 47.0°F on 2025, while the historical minimum was 43.7°F on 2016.

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 45.7°F, with minimum temperature starting at 45.1°F, while the maximum might reach 46.2°F.

Daily water temperature in Keflavík

Date	Current Year actual* / forecast**	last year	10 years average
May 3	43.6°F	45.2°F	43.9°F
May 4	44.5°F	44.9°F	44.0°F
May 5	44.5°F	44.9°F	44.1°F
May 6	44.2°F	45.0°F	44.2°F
May 7	44.3°F	45.3°F	44.4°F
May 8	44.1°F	45.2°F	44.2°F
May 9	43.9°F	45.3°F	44.3°F
May 10	43.1°F	45.3°F	44.3°F
May 11	43.8°F	45.3°F	44.3°F
May 12	44.0°F	45.2°F	44.2°F
May 13	44.9°F	45.7°F	44.6°F
May 14	45.0°F	45.5°F	44.7°F
May 15	45.2°F	46.2°F	44.8°F
May 16	44.6°F	46.0°F	44.9°F
May 17	45.0°F	47.0°F	45.0°F
May 18	45.1°F	47.4°F	45.1°F
May 19	45.2°F	48.0°F	45.2°F
May 20	45.4°F	48.8°F	45.4°F
May 21	45.7°F	49.8°F	45.7°F
May 22	46.1°F	49.6°F	46.1°F
May 23	46.1°F	49.8°F	46.1°F
May 24	46.2°F	49.7°F	46.3°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, 42.2°F in Spring, 51.0°F in Summer, and 47.5°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Álftanes	45.3°F	18mi
Hafnarfjörður	45.4°F	19mi
Kópavogur	45.4°F	21mi
Reykjavík	45.5°F	22mi
Akranes	44.4°F	26mi

* current water temperature in this city

** straight line distance from Keflavík