All data are in degrees Fahrenheit

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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.
Sea temperature in Reykjavík now

49.5

°F

October 10, 20:29

Trend:

decreasing

Yesterday:

49.8°F

Tomorrow:

49.4°F

Sunrise:

08:02

Sunset:

18:26

Day Length:

10 h. 24 min.

Reykjavík in October

Minimum:

33.5°F

Average:

37.0°F

Maximum:

39.0°F

Sea water temperature in Reykjavík today

As of now, in Reykjavík, the water temperature is 49.5°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 2.2°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 49.1°F on 2017, while the historical minimum was 45.5°F on 2018.

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. 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 26 53.0°F 47.8°F 49.7°F
Sep 27 52.7°F 47.6°F 49.5°F
Sep 28 51.5°F 47.5°F 49.3°F
Sep 29 51.0°F 47.3°F 49.1°F
Sep 30 51.4°F 47.2°F 49.1°F
Oct 1 51.0°F 46.9°F 48.9°F
Oct 2 50.7°F 46.8°F 48.8°F
Oct 3 50.3°F 46.8°F 48.6°F
Oct 4 49.9°F 46.8°F 48.3°F
Oct 5 49.4°F 46.5°F 48.1°F
Oct 6 49.1°F 46.6°F 48.0°F
Oct 7 49.2°F 46.3°F 47.9°F
Oct 8 50.0°F 46.4°F 47.8°F
Oct 9 49.8°F 46.1°F 47.6°F
Oct 10 49.5°F 46.0°F 47.4°F
Oct 11 49.4°F 46.2°F 47.2°F
Oct 12 49.2°F 45.6°F 47.0°F
Oct 13 49.0°F 45.5°F 46.9°F
Oct 14 48.8°F 45.2°F 46.6°F
Oct 15 48.7°F 44.9°F 46.5°F
Oct 16 48.7°F 44.9°F 46.5°F
Oct 17 48.6°F 44.7°F 46.4°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 46.9°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Kópavogur 49.5°F 2mi
Álftanes 49.4°F 4mi
Hafnarfjörður 49.5°F 5mi
Akranes 48.6°F 14mi
Keflavík 49.2°F 22mi

* current water temperature in this city

** straight line distance from Reykjavík