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 9.43°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.

49.0

°F

October 13, 10:17

Trend:

stable

Yesterday:

48.8°F

Tomorrow:

48.8°F

Sunrise:

08:13

Sunset:

18:19

Day Length:

10 h. 6 min.

Keflavík in October

Minimum:

39.1°F

Average:

40.5°F

Maximum:

42.4°F

Sea water temperature in Keflavík today

As of now, in Keflavík, the water temperature is 49.0°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 1.4°F higher than 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 fall a bit.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 49.1°F on 2025, while the historical minimum was 46.2°F on 2020.

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 48.5°F, the minimum temperature may reach 48.3°F, and the maximum might stay at 48.8°F.

Daily water temperature in Keflavík

Date	Current Year actual* / forecast**	last year	10 years average
Sep 29	50.6°F	50.8°F	49.6°F
Sep 30	50.6°F	50.8°F	49.5°F
Oct 1	49.9°F	50.6°F	49.3°F
Oct 2	49.7°F	50.6°F	49.1°F
Oct 3	49.9°F	50.4°F	49.0°F
Oct 4	49.6°F	50.4°F	48.9°F
Oct 5	49.9°F	50.5°F	48.8°F
Oct 6	49.6°F	50.1°F	48.6°F
Oct 7	49.6°F	49.9°F	48.5°F
Oct 8	49.5°F	49.7°F	48.3°F
Oct 9	49.1°F	49.6°F	48.3°F
Oct 10	49.2°F	49.2°F	48.2°F
Oct 11	49.0°F	49.0°F	48.0°F
Oct 12	48.8°F	49.2°F	47.9°F
Oct 13	49.0°F	49.1°F	47.6°F
Oct 14	48.8°F	48.9°F	47.5°F
Oct 15	48.7°F	48.0°F	47.4°F
Oct 16	48.7°F	47.8°F	47.3°F
Oct 17	48.5°F	47.8°F	47.2°F
Oct 18	48.3°F	46.9°F	47.0°F
Oct 19	48.4°F	47.9°F	47.0°F
Oct 20	48.3°F	48.1°F	46.9°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	48.6°F	18mi
Hafnarfjörður	48.4°F	19mi
Kópavogur	48.3°F	21mi
Reykjavík	48.2°F	22mi
Akranes	48.4°F	26mi

* current water temperature in this city

** straight line distance from Keflavík