What is the current water temperature in Reykjavík?

Q: What is the current water temperature in Reykjavík?

As of now, in Reykjavík, the water temperature is 8.63°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.

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Water temperature in Reykjavík

Detailed information about the current water temperature in Reykjavík. 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.

47.5

°F

October 18, 22:41

Trend:

stable

Yesterday:

47.4°F

Tomorrow:

47.5°F

Sunrise:

08:26

Sunset:

17:58

Day Length:

9 h. 32 min.

Reykjavík in October

Minimum:

33.5°F

Average:

37.2°F

Maximum:

39.8°F

Sea water temperature in Reykjavík today

As of now, in Reykjavík, the water temperature is 47.5°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 0.5°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 stay about the same.

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 aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 53.8°F on 2025, while the historical minimum was 44.7°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 46.9°F, the minimum temperature may reach 46.4°F, and the maximum might stay at 47.5°F.

Daily water temperature in Reykjavík

Date	Current Year actual* / forecast**	last year	10 years average
Oct 4	49.3°F	49.9°F	48.5°F
Oct 5	49.2°F	49.4°F	48.3°F
Oct 6	49.1°F	49.1°F	48.1°F
Oct 7	49.0°F	49.2°F	48.0°F
Oct 8	48.7°F	50.0°F	47.9°F
Oct 9	48.5°F	49.8°F	47.7°F
Oct 10	48.6°F	49.5°F	47.7°F
Oct 11	48.5°F	50.1°F	47.6°F
Oct 12	48.2°F	51.0°F	47.5°F
Oct 13	48.2°F	51.2°F	47.4°F
Oct 14	48.2°F	50.8°F	47.2°F
Oct 15	48.2°F	51.7°F	47.2°F
Oct 16	47.6°F	52.8°F	47.2°F
Oct 17	47.4°F	53.7°F	47.2°F
Oct 18	47.5°F	53.8°F	47.1°F
Oct 19	47.5°F	53.4°F	47.0°F
Oct 20	47.3°F	53.5°F	46.9°F
Oct 21	47.3°F	53.0°F	46.9°F
Oct 22	47.0°F	50.4°F	46.5°F
Oct 23	46.6°F	48.8°F	46.2°F
Oct 24	46.4°F	47.9°F	45.9°F
Oct 25	46.4°F	48.6°F	45.9°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 Reykjavík by month

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

The warmest water in Reykjavík was recorded on September 5, 2025, reaching a 57.1°F. While the coldest temperature occurred on February 19, 2017, dipping to 32.5°F. The average readings by season are 37.4°F in Winter, 40.7°F in Spring, 51.8°F in Summer, and 47.1°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Kópavogur	47.6°F	2mi
Álftanes	47.8°F	4mi
Hafnarfjörður	47.7°F	5mi
Akranes	47.5°F	14mi
Keflavík	48.3°F	22mi

* current water temperature in this city

** straight line distance from Reykjavík