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 4.43°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.

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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.

40.0

°F

December 10, 08:09

Trend:

decreasing

Yesterday:

40.2°F

Tomorrow:

39.7°F

Sunrise:

11:07

Sunset:

15:33

Day Length:

4 h. 26 min.

Reykjavík in December

Minimum:

33.7°F

Average:

36.8°F

Maximum:

38.8°F

Sea water temperature in Reykjavík today

As of now, in Reykjavík, the water temperature is 40.0°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 0.9°F higher 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 fall a bit.

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 is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 40.8°F on 2022, while the historical minimum was 35.7°F on 2016.

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 39.4°F, the minimum temperature may reach 39.3°F, and the maximum might stay at 39.7°F.

Daily water temperature in Reykjavík

Date	Current Year actual* / forecast**	last year	10 years average
Nov 26	42.4°F	41.8°F	42.1°F
Nov 27	42.5°F	41.7°F	42.0°F
Nov 28	42.7°F	41.9°F	42.1°F
Nov 29	42.3°F	41.4°F	41.9°F
Nov 30	42.0°F	41.6°F	41.7°F
Dec 1	42.0°F	41.0°F	41.5°F
Dec 2	41.7°F	40.7°F	41.0°F
Dec 3	41.5°F	40.4°F	40.7°F
Dec 4	41.0°F	40.0°F	40.3°F
Dec 5	40.8°F	39.9°F	40.0°F
Dec 6	40.1°F	39.4°F	39.8°F
Dec 7	40.3°F	38.6°F	39.6°F
Dec 8	40.5°F	38.8°F	39.4°F
Dec 9	40.2°F	38.8°F	39.4°F
Dec 10	40.0°F	38.7°F	39.0°F
Dec 11	39.7°F	38.5°F	38.8°F
Dec 12	39.5°F	38.2°F	38.6°F
Dec 13	39.4°F	38.2°F	38.4°F
Dec 14	39.3°F	38.1°F	38.4°F
Dec 15	39.3°F	37.7°F	38.3°F
Dec 16	39.3°F	37.7°F	38.4°F
Dec 17	39.3°F	37.3°F	38.3°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 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 37.3°F in Winter, 40.6°F in Spring, 51.5°F in Summer, and 47.0°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Kópavogur	40.2°F	2mi
Álftanes	40.6°F	4mi
Hafnarfjörður	40.4°F	5mi
Akranes	40.2°F	14mi
Keflavík	42.9°F	22mi

* current water temperature in this city

** straight line distance from Reykjavík