All data are in degrees Fahrenheit

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Water temperature in Lerwick

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

56.0

°F

July 30, 14:07

Trend:

stable

Yesterday:

56.1°F

Tomorrow:

56.1°F

Sunrise:

04:39

Sunset:

21:42

Day Length:

17 h. 3 min.

Lerwick in August

Minimum:

46.0°F

Average:

46.8°F

Maximum:

47.7°F

Sea water temperature in Lerwick today

As of now, in Lerwick, the water temperature is 56.0°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 1.6°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 stay about the same.

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 55.0°F on 2017, while the historical minimum was 52.9°F on 2015.

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 56.4°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Lerwick

Date Current Year

actual* / forecast**

last year 10 years average
Jul 16 56.4°F 52.9°F 53.7°F
Jul 17 56.1°F 53.0°F 53.7°F
Jul 18 57.1°F 53.7°F 53.9°F
Jul 19 57.2°F 53.5°F 53.9°F
Jul 20 57.0°F 53.1°F 53.8°F
Jul 21 57.1°F 53.1°F 53.8°F
Jul 22 58.3°F 53.3°F 53.9°F
Jul 23 58.1°F 53.6°F 53.9°F
Jul 24 58.2°F 54.3°F 54.2°F
Jul 25 58.0°F 54.3°F 54.2°F
Jul 26 57.0°F 54.3°F 54.2°F
Jul 27 56.3°F 54.4°F 54.3°F
Jul 28 56.4°F 54.3°F 54.5°F
Jul 29 56.1°F 54.5°F 54.5°F
Jul 30 56.0°F 54.3°F 54.4°F
Jul 31 56.1°F 53.6°F 54.5°F
Aug 1 56.3°F 53.9°F 54.6°F
Aug 2 56.4°F 54.4°F 54.7°F
Aug 3 56.6°F 54.5°F 54.9°F
Aug 4 56.6°F 54.6°F 54.9°F
Aug 5 56.5°F 55.3°F 54.9°F
Aug 6 56.4°F 55.3°F 54.8°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 Lerwick by month

In an average year, Lerwick offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Lerwick was recorded on July 22, 2025, reaching a 58.3°F. While the coldest temperature occurred on March 21, 2018, dipping to 42.8°F. The average readings by season are 46.6°F in Winter, 46.0°F in Spring, 52.9°F in Summer, and 52.3°F in Autumn.