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 12.37°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.

54.3

°F

October 25, 11:26

Trend:

decreasing

Yesterday:

54.4°F

Tomorrow:

53.9°F

Sunrise:

07:23

Sunset:

16:58

Day Length:

9 h. 35 min.

Ruhnu in November

Minimum:

36.2°F

Average:

37.7°F

Maximum:

40.2°F

Sea water temperature in Ruhnu today

As of now, in Ruhnu, the water temperature is 54.3°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 fall a bit.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 53.9°F on 2024, while the historical minimum was 49.0°F on 2016.

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. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 53.3°F, the minimum temperature may reach 52.6°F, and the maximum might stay at 53.9°F.

Daily water temperature in Ruhnu

Date	Current Year actual* / forecast**	last year	10 years average
Oct 11	57.4°F	56.2°F	54.9°F
Oct 12	56.9°F	55.7°F	54.9°F
Oct 13	56.9°F	55.8°F	54.7°F
Oct 14	56.0°F	56.2°F	54.5°F
Oct 15	56.1°F	55.4°F	54.3°F
Oct 16	56.3°F	53.9°F	54.0°F
Oct 17	56.1°F	53.8°F	53.7°F
Oct 18	55.0°F	54.2°F	53.6°F
Oct 19	55.3°F	54.3°F	53.5°F
Oct 20	55.1°F	53.6°F	53.3°F
Oct 21	54.5°F	53.4°F	52.9°F
Oct 22	54.3°F	52.8°F	52.6°F
Oct 23	53.8°F	52.5°F	52.4°F
Oct 24	54.4°F	52.2°F	52.1°F
Oct 25	54.3°F	51.8°F	51.8°F
Oct 26	53.9°F	51.5°F	51.5°F
Oct 27	53.7°F	52.1°F	51.3°F
Oct 28	53.4°F	52.1°F	51.0°F
Oct 29	53.2°F	52.2°F	50.8°F
Oct 30	53.2°F	51.7°F	50.7°F
Oct 31	52.9°F	51.2°F	50.5°F
Nov 1	52.6°F	51.0°F	50.1°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 54.6°F in Autumn.