All data are in degrees Fahrenheit

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Water temperature in Fort William

Detailed information about the current water temperature in Fort William. 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 Fort William now

44.1

°F

April 5, 16:22

Trend:

stable

Yesterday:

44.2°F

Tomorrow:

44.2°F

Sunrise:

06:40

Sunset:

20:07

Day Length:

13 h. 27 min.

Fort William in April

Minimum:

47.5°F

Average:

47.8°F

Maximum:

48.6°F

Sea water temperature in Fort William today

As of now, in Fort William, the water temperature is 44.1°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 1.0°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

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 46.1°F on 2017, while the historical minimum was 43.8°F on 2018.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 44.5°F, with minimum temperature starting at 44.2°F, while the maximum might reach 44.8°F.

Daily water temperature in Fort William

Date Current Year

actual* / forecast**

last year 10 years average
Mar 22 44.0°F 45.5°F 44.8°F
Mar 23 45.1°F 45.5°F 44.9°F
Mar 24 44.9°F 45.3°F 44.8°F
Mar 25 44.7°F 45.3°F 44.9°F
Mar 26 45.0°F 45.3°F 44.9°F
Mar 27 44.7°F 45.3°F 44.9°F
Mar 28 44.9°F 45.3°F 45.0°F
Mar 29 45.0°F 45.4°F 45.1°F
Mar 30 44.9°F 45.4°F 45.0°F
Mar 31 45.1°F 45.4°F 45.1°F
Apr 1 45.2°F 45.5°F 45.1°F
Apr 2 44.7°F 45.9°F 45.1°F
Apr 3 44.7°F 45.8°F 45.1°F
Apr 4 44.2°F 46.7°F 45.1°F
Apr 5 44.1°F 45.8°F 45.1°F
Apr 6 44.2°F 45.8°F 45.2°F
Apr 7 44.2°F 45.8°F 45.3°F
Apr 8 44.4°F 46.5°F 45.4°F
Apr 9 44.5°F 47.1°F 45.5°F
Apr 10 44.6°F 47.4°F 45.6°F
Apr 11 44.7°F 47.4°F 45.7°F
Apr 12 44.8°F 47.4°F 45.8°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 Fort William by month

In an average year, Fort William offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Fort William was recorded on August 19, 2025, reaching a 59.1°F. While the coldest temperature occurred on March 12, 2016, dipping to 43.3°F. The average readings by season are 47.3°F in Winter, 46.6°F in Spring, 54.8°F in Summer, and 54.6°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Alexandria 45.3°F 60mi
Dumbarton 45.3°F 64mi
Houston 45.3°F 69mi

* current water temperature in this city

** straight line distance from Fort William