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 9.77°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.

49.6

°F

October 3, 17:04

Trend:

stable

Yesterday:

49.4°F

Tomorrow:

49.4°F

Sunrise:

07:41

Sunset:

18:51

Day Length:

11 h. 10 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 49.6°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 1.0°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 50.3°F on 2025, while the historical minimum was 46.8°F on 2024.

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 shows a gradual cooling trend. The average temperature is expected to be 48.9°F, the minimum temperature may reach 48.6°F, and the maximum might stay at 49.4°F.

Daily water temperature in Reykjavík

Date	Current Year actual* / forecast**	last year	10 years average
Sep 19	50.8°F	53.6°F	50.5°F
Sep 20	50.8°F	53.0°F	50.3°F
Sep 21	50.6°F	53.2°F	50.2°F
Sep 22	50.7°F	54.4°F	50.2°F
Sep 23	50.5°F	55.4°F	50.2°F
Sep 24	50.3°F	53.1°F	49.9°F
Sep 25	50.1°F	53.0°F	49.8°F
Sep 26	50.1°F	53.0°F	49.8°F
Sep 27	50.3°F	52.7°F	49.6°F
Sep 28	49.9°F	51.5°F	49.4°F
Sep 29	49.9°F	51.0°F	49.2°F
Sep 30	49.9°F	51.4°F	49.2°F
Oct 1	49.4°F	51.0°F	49.0°F
Oct 2	49.4°F	50.7°F	48.8°F
Oct 3	49.6°F	50.3°F	48.6°F
Oct 4	49.4°F	49.9°F	48.4°F
Oct 5	49.1°F	49.4°F	48.2°F
Oct 6	49.0°F	49.1°F	48.0°F
Oct 7	48.8°F	49.2°F	47.9°F
Oct 8	48.8°F	50.0°F	47.8°F
Oct 9	48.6°F	49.8°F	47.6°F
Oct 10	48.6°F	49.5°F	47.6°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 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 47.0°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Kópavogur	49.7°F	2mi
Álftanes	49.8°F	4mi
Hafnarfjörður	49.7°F	5mi
Akranes	49.5°F	14mi
Keflavík	49.9°F	22mi

* current water temperature in this city

** straight line distance from Reykjavík