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

53.6

°F

June 25, 15:51

Trend:

decreasing

Yesterday:

54.0°F

Tomorrow:

53.2°F

Sunrise:

-

Sunset:

-

Day Length:

-

Hafnarfjörður in July

Minimum:

34.1°F

Average:

37.6°F

Maximum:

40.2°F

Sea water temperature in Hafnarfjörður today

As of now, in Hafnarfjörður, the water temperature is 53.6°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 3.3°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

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 51.9°F on 2019, while the historical minimum was 48.6°F on 2021.

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. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 53.7°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
Jun 11 51.3°F 49.3°F 49.1°F
Jun 12 50.9°F 48.9°F 49.0°F
Jun 13 51.9°F 49.2°F 49.1°F
Jun 14 52.4°F 49.3°F 49.3°F
Jun 15 52.4°F 51.0°F 49.7°F
Jun 16 52.1°F 53.1°F 50.1°F
Jun 17 52.5°F 53.5°F 50.3°F
Jun 18 52.2°F 53.2°F 50.5°F
Jun 19 54.0°F 52.9°F 50.7°F
Jun 20 54.9°F 51.9°F 50.8°F
Jun 21 54.5°F 51.7°F 50.8°F
Jun 22 54.8°F 51.5°F 50.7°F
Jun 23 54.3°F 51.4°F 50.6°F
Jun 24 54.0°F 51.2°F 50.6°F
Jun 25 53.6°F 51.1°F 50.2°F
Jun 26 53.2°F 50.7°F 49.9°F
Jun 27 53.3°F 50.4°F 50.0°F
Jun 28 53.5°F 50.2°F 50.2°F
Jun 29 53.6°F 51.4°F 50.2°F
Jun 30 53.9°F 51.6°F 50.6°F
Jul 1 54.2°F 52.6°F 50.8°F
Jul 2 54.4°F 52.1°F 51.0°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 53.7°F 3mi
Álftanes 53.3°F 3mi
Reykjavík 53.9°F 5mi
Akranes 52.3°F 18mi
Keflavík 51.6°F 19mi

* current water temperature in this city

** straight line distance from Hafnarfjörður