What is the current water temperature in Ruhnu?

Q: What is the current water temperature in Ruhnu?

As of now, in Ruhnu, the water temperature is 1.32°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.

Estonia > Ruhnu

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.

34.4

°F

April 8, 08:45

Trend:

stable

Yesterday:

34.3°F

Tomorrow:

34.3°F

Sunrise:

06:37

Sunset:

20:22

Day Length:

13 h. 45 min.

Ruhnu in April

Minimum:

37.0°F

Average:

39.1°F

Maximum:

41.2°F

Sea water temperature in Ruhnu today

As of now, in Ruhnu, the water temperature is 34.4°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 1.7°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 stay about the same.

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 minimum temperature for this date. The maximum temperature recorded for this date was 40.4°F on 2020, while the historical minimum was 32.9°F on 2018.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 34.7°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Ruhnu

Date	Current Year actual* / forecast**	last year	10 years average
Mar 25	33.0°F	35.1°F	34.5°F
Mar 26	32.9°F	34.9°F	34.4°F
Mar 27	33.9°F	36.9°F	34.7°F
Mar 28	33.6°F	37.0°F	34.9°F
Mar 29	33.0°F	37.2°F	35.0°F
Mar 30	33.4°F	37.1°F	34.8°F
Mar 31	33.5°F	35.3°F	34.9°F
Apr 1	34.7°F	32.9°F	34.8°F
Apr 2	34.4°F	37.7°F	35.2°F
Apr 3	34.1°F	37.8°F	35.2°F
Apr 4	34.3°F	38.6°F	35.3°F
Apr 5	33.9°F	38.3°F	35.5°F
Apr 6	34.6°F	37.7°F	35.6°F
Apr 7	34.3°F	37.4°F	36.0°F
Apr 8	34.4°F	37.3°F	36.1°F
Apr 9	34.3°F	37.9°F	36.0°F
Apr 10	34.2°F	37.3°F	35.9°F
Apr 11	34.4°F	36.8°F	36.1°F
Apr 12	35.0°F	37.8°F	36.7°F
Apr 13	34.7°F	37.4°F	36.4°F
Apr 14	35.0°F	38.6°F	36.7°F
Apr 15	35.3°F	38.8°F	37.0°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 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, 39.5°F in Spring, 63.7°F in Summer, and 54.6°F in Autumn.