What is the current water temperature in Jakobstad?

Q: What is the current water temperature in Jakobstad?

As of now, in Jakobstad, the water temperature is 2.54°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.

Finland > Jakobstad

Water temperature in Jakobstad

Detailed information about the current water temperature in Jakobstad. 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.

36.6

°F

December 20, 03:40

Trend:

stable

Yesterday:

36.2°F

Tomorrow:

36.1°F

Sunrise:

10:15

Sunset:

14:38

Day Length:

4 h. 23 min.

Jakobstad in December

Minimum:

32.0°F

Average:

32.5°F

Maximum:

33.4°F

Sea water temperature in Jakobstad today

As of now, in Jakobstad, the water temperature is 36.6°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 1.5°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 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 36.4°F on 2018, while the historical minimum was 33.5°F on 2024.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 35.7°F, the minimum temperature may reach 35.4°F, and the maximum might stay at 36.1°F.

Daily water temperature in Jakobstad

Date	Current Year actual* / forecast**	last year	10 years average
Dec 6	36.1°F	35.2°F	36.4°F
Dec 7	36.1°F	34.5°F	36.3°F
Dec 8	36.0°F	34.6°F	36.3°F
Dec 9	36.0°F	34.5°F	36.4°F
Dec 10	36.0°F	34.5°F	36.4°F
Dec 11	36.1°F	34.1°F	36.4°F
Dec 12	36.7°F	33.2°F	36.2°F
Dec 13	36.5°F	33.4°F	35.9°F
Dec 14	36.5°F	33.5°F	35.8°F
Dec 15	36.5°F	33.6°F	35.7°F
Dec 16	36.6°F	33.9°F	35.4°F
Dec 17	35.6°F	33.8°F	35.1°F
Dec 18	35.8°F	33.5°F	34.8°F
Dec 19	36.2°F	33.5°F	34.6°F
Dec 20	36.6°F	33.5°F	35.0°F
Dec 21	36.1°F	33.4°F	34.6°F
Dec 22	35.9°F	32.6°F	34.3°F
Dec 23	35.8°F	32.4°F	34.3°F
Dec 24	35.6°F	32.4°F	34.1°F
Dec 25	35.5°F	32.3°F	34.0°F
Dec 26	35.4°F	32.5°F	33.9°F
Dec 27	35.4°F	33.1°F	33.8°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 Jakobstad by month

In an average year, Jakobstad offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in Jakobstad was recorded on July 25, 2025, reaching a 72.4°F. While the coldest temperature occurred on January 1, 2023, dipping to 32.0°F. The average readings by season are 33.3°F in Winter, 35.6°F in Spring, 59.3°F in Summer, and 47.4°F in Autumn.