All data are in degrees Fahrenheit

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Water temperature in Ruhnu

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

62.4

°F

September 12, 06:47

Trend:

decreasing

Yesterday:

62.4°F

Tomorrow:

61.9°F

Sunrise:

06:50

Sunset:

19:56

Day Length:

13 h. 6 min.

Ruhnu in September

Minimum:

36.4°F

Average:

38.0°F

Maximum:

40.7°F

Sea water temperature in Ruhnu today

As of now, in Ruhnu, the water temperature is 62.4°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 1.2°F lower 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

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling 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 66.9°F on 2024, while the historical minimum was 60.1°F on 2021.

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 61.0°F, the minimum temperature may reach 60.1°F, and the maximum might stay at 61.9°F.

Daily water temperature in Ruhnu

Date Current Year

actual* / forecast**

last year 10 years average
Aug 29 64.6°F 62.6°F 65.4°F
Aug 30 64.2°F 62.1°F 65.0°F
Aug 31 64.0°F 61.8°F 64.9°F
Sep 1 63.8°F 62.3°F 64.8°F
Sep 2 63.5°F 63.0°F 64.6°F
Sep 3 63.9°F 63.3°F 64.5°F
Sep 4 63.3°F 62.6°F 64.1°F
Sep 5 63.1°F 63.5°F 64.1°F
Sep 6 63.1°F 64.4°F 64.2°F
Sep 7 62.6°F 64.0°F 63.8°F
Sep 8 62.5°F 65.4°F 63.8°F
Sep 9 63.2°F 66.0°F 63.8°F
Sep 10 62.2°F 66.0°F 63.7°F
Sep 11 62.4°F 65.8°F 63.6°F
Sep 12 62.4°F 65.1°F 63.6°F
Sep 13 61.9°F 64.3°F 63.1°F
Sep 14 61.7°F 64.1°F 62.9°F
Sep 15 61.3°F 63.9°F 62.6°F
Sep 16 61.0°F 62.9°F 62.2°F
Sep 17 60.6°F 63.0°F 61.9°F
Sep 18 60.2°F 63.0°F 61.4°F
Sep 19 60.1°F 62.3°F 61.3°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 Ruhnu by month

In an average year, Ruhnu offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Ruhnu was recorded on July 17, 2021, reaching a 77.4°F. While the coldest temperature occurred on February 1, 2026, dipping to 32.0°F. The average readings by season are 37.7°F in Winter, 39.4°F in Spring, 63.5°F in Summer, and 54.5°F in Autumn.