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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

49.6

°F

May 12, 04:51

Trend:

decreasing

Yesterday:

49.8°F

Tomorrow:

49.5°F

Sunrise:

05:10

Sunset:

21:25

Day Length:

16 h. 15 min.

Fort William in May

Minimum:

47.4°F

Average:

47.6°F

Maximum:

48.4°F

Sea water temperature in Fort William today

As of now, in Fort William, the water temperature is 49.6°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 0.6°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 reading indicates a minor change compared to the average water temperature of the last two weeks, but the overall trend remains steady. It also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 50.6°F on 2016, while the historical minimum was 48.1°F on 2018.

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 49.4°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Fort William

Date Current Year

actual* / forecast**

 last year 10 years average
Apr 28 48.3°F 48.1°F 47.1°F
Apr 29 48.9°F 48.1°F 47.2°F
Apr 30 49.7°F 48.1°F 47.4°F
May 1 49.6°F 48.3°F 47.5°F
May 2 49.7°F 48.3°F 47.7°F
May 3 49.5°F 48.3°F 47.9°F
May 4 49.5°F 48.2°F 48.0°F
May 5 49.6°F 47.8°F 48.1°F
May 6 49.5°F 47.9°F 48.3°F
May 7 49.7°F 48.2°F 48.5°F
May 8 49.6°F 48.4°F 48.7°F
May 9 49.5°F 48.9°F 49.0°F
May 10 49.8°F 49.2°F 49.3°F
May 11 49.8°F 49.2°F 49.3°F
May 12 49.6°F 49.0°F 49.1°F
May 13 49.5°F 49.8°F 49.0°F
May 14 49.3°F 49.6°F 48.7°F
May 15 49.5°F 50.9°F 48.9°F
May 16 49.4°F 50.8°F 48.8°F
May 17 49.4°F 50.4°F 48.8°F
May 18 49.4°F 50.4°F 48.8°F
May 19 49.4°F 49.7°F 48.8°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

January

February

March

April

May

June

July

August

September

October

November

December

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 51.3°F 60mi
Dumbarton 51.3°F 64mi
Houston 51.3°F 69mi

* current water temperature in this city

** straight line distance from Fort William