What is the current water temperature in Hafnarfjörður?

Q: What is the current water temperature in Hafnarfjörður?

As of now, in Hafnarfjörður, the water temperature is 4.6°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.

Iceland > Hafnarfjörður

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.

40.3

°F

January 1, 07:30

Trend:

stable

Yesterday:

40.4°F

Tomorrow:

40.5°F

Sunrise:

11:19

Sunset:

15:45

Day Length:

4 h. 26 min.

Hafnarfjörður in January

Minimum:

35.1°F

Average:

37.9°F

Maximum:

40.1°F

Sea water temperature in Hafnarfjörður today

As of now, in Hafnarfjörður, the water temperature is 40.3°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 2.4°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 rise a bit.

Recent sea temperature and forecast

Today's water temperature closely matches the previous two weeks' average, indicating a stable trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 40.1°F on 2022, while the historical minimum was 35.1°F on 2017.

latest data

last year

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 40.0°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
Jan 1	40.3°F	37.1°F	37.9°F
Jan 2	40.5°F	37.7°F	38.1°F
Jan 3	40.4°F	37.8°F	38.0°F
Jan 4	40.1°F	37.7°F	37.7°F
Jan 5	39.7°F	36.8°F	37.3°F
Jan 6	39.7°F	37.1°F	37.3°F
Jan 7	39.8°F	37.6°F	37.4°F
Jan 8	39.7°F	37.1°F	37.3°F
Dec 18	39.9°F	37.2°F	38.8°F
Dec 19	39.7°F	37.2°F	38.7°F
Dec 20	39.8°F	37.4°F	38.6°F
Dec 21	40.7°F	36.8°F	38.7°F
Dec 22	40.7°F	37.0°F	38.6°F
Dec 23	40.8°F	36.4°F	38.5°F
Dec 24	40.6°F	37.2°F	38.6°F
Dec 25	40.2°F	37.3°F	38.6°F
Dec 26	40.4°F	37.6°F	38.6°F
Dec 27	41.0°F	37.7°F	38.6°F
Dec 28	40.6°F	37.8°F	38.4°F
Dec 29	40.3°F	38.0°F	38.4°F
Dec 30	40.0°F	37.9°F	38.1°F
Dec 31	40.4°F	38.2°F	38.0°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 37.7°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	40.1°F	3mi
Álftanes	40.7°F	3mi
Reykjavík	39.8°F	5mi
Akranes	37.6°F	18mi
Keflavík	42.3°F	19mi

* current water temperature in this city

** straight line distance from Hafnarfjörður