All data are in degrees Fahrenheit

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Water temperature in Hafnarfjörður

Detailed information about the current water temperature in Hafnarfjörður. 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 Hafnarfjörður now

48.5

°F

October 25, 21:32

Trend:

stable

Yesterday:

47.9°F

Tomorrow:

48.4°F

Sunrise:

08:47

Sunset:

17:35

Day Length:

8 h. 48 min.

Hafnarfjörður in November

Minimum:

35.0°F

Average:

37.4°F

Maximum:

39.2°F

Sea water temperature in Hafnarfjörður today

As of now, in Hafnarfjörður, the water temperature is 48.5°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 2.8°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 is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 47.5°F on 2016, while the historical minimum was 44.3°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 48.0°F, the minimum temperature may reach 47.7°F, and the maximum might stay at 48.4°F.

Daily water temperature in Hafnarfjörður

Date Current Year

actual* / forecast**

last year 10 years average
Oct 11 49.9°F 46.3°F 47.5°F
Oct 12 50.8°F 45.7°F 47.4°F
Oct 13 50.9°F 45.6°F 47.3°F
Oct 14 50.5°F 45.3°F 47.0°F
Oct 15 51.1°F 45.0°F 47.0°F
Oct 16 52.1°F 45.1°F 47.1°F
Oct 17 53.0°F 44.8°F 47.1°F
Oct 18 53.0°F 44.8°F 47.0°F
Oct 19 52.6°F 44.7°F 46.9°F
Oct 20 52.7°F 44.6°F 46.7°F
Oct 21 52.3°F 44.8°F 46.7°F
Oct 22 50.1°F 44.6°F 46.5°F
Oct 23 48.7°F 44.6°F 46.2°F
Oct 24 47.9°F 44.5°F 46.0°F
Oct 25 48.5°F 44.5°F 45.7°F
Oct 26 48.4°F 44.4°F 45.6°F
Oct 27 48.3°F 44.3°F 45.5°F
Oct 28 48.1°F 44.2°F 45.4°F
Oct 29 48.0°F 44.0°F 45.2°F
Oct 30 47.9°F 43.7°F 45.1°F
Oct 31 47.7°F 43.6°F 44.9°F
Nov 1 47.7°F 43.4°F 44.9°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 Hafnarfjörður by month

In an average year, Hafnarfjörður offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Hafnarfjörður was recorded on September 5, 2025, reaching a 56.4°F. While the coldest temperature occurred on January 24, 2023, dipping to 33.8°F. The average readings by season are 37.7°F in Winter, 40.7°F in Spring, 51.5°F in Summer, and 47.0°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Kópavogur 48.5°F 3mi
Álftanes 48.3°F 3mi
Reykjavík 48.6°F 5mi
Akranes 47.2°F 18mi
Keflavík 47.9°F 19mi

* current water temperature in this city

** straight line distance from Hafnarfjörður