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

52.9

°F

August 15, 21:07

Trend:

stable

Yesterday:

52.3°F

Tomorrow:

52.8°F

Sunrise:

05:18

Sunset:

21:44

Day Length:

16 h. 26 min.

Hafnarfjörður in August

Minimum:

34.1°F

Average:

37.5°F

Maximum:

40.3°F

Sea water temperature in Hafnarfjörður today

As of now, in Hafnarfjörður, the water temperature is 52.9°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 0.6°F lower 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 closely matches the previous two weeks' average, indicating a stable trend. It also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 56.3°F on 2021, while the historical minimum was 52.1°F on 2020.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 52.7°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Hafnarfjörður

Date Current Year

actual* / forecast**

last year 10 years average
Aug 1 52.9°F 54.6°F 53.2°F
Aug 2 53.2°F 54.4°F 53.3°F
Aug 3 53.5°F 54.0°F 53.5°F
Aug 4 53.5°F 54.0°F 53.5°F
Aug 5 53.2°F 53.9°F 53.6°F
Aug 6 53.8°F 53.7°F 53.8°F
Aug 7 53.9°F 53.8°F 53.8°F
Aug 8 54.2°F 53.5°F 53.8°F
Aug 9 52.8°F 53.5°F 53.8°F
Aug 10 51.8°F 53.4°F 53.7°F
Aug 11 52.2°F 53.5°F 53.8°F
Aug 12 52.2°F 52.8°F 53.4°F
Aug 13 51.7°F 52.5°F 53.3°F
Aug 14 52.3°F 52.4°F 53.3°F
Aug 15 52.9°F 52.5°F 53.5°F
Aug 16 52.8°F 52.2°F 53.4°F
Aug 17 52.8°F 52.2°F 53.4°F
Aug 18 52.7°F 52.2°F 53.3°F
Aug 19 52.6°F 53.2°F 53.2°F
Aug 20 52.5°F 53.1°F 53.1°F
Aug 21 52.7°F 54.6°F 53.3°F
Aug 22 52.5°F 53.8°F 53.1°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 37.8°F in Winter, 40.8°F in Spring, 51.7°F in Summer, and 47.1°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Kópavogur 52.9°F 3mi
Álftanes 52.7°F 3mi
Reykjavík 53.0°F 5mi
Akranes 52.2°F 18mi
Keflavík 53.1°F 19mi

* current water temperature in this city

** straight line distance from Hafnarfjörður