All data are in degrees Fahrenheit

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Water temperature in Belfast

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

68.8

°F

August 25, 01:21

Trend:

stable

Yesterday:

68.6°F

Tomorrow:

68.6°F

Sunrise:

06:23

Sunset:

20:03

Day Length:

13 h. 40 min.

Belfast in September

Minimum:

32.0°F

Average:

32.2°F

Maximum:

32.9°F

Sea water temperature in Belfast today

As of now, in Belfast, the water temperature is 68.8°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. 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 water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. 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 71.1°F on 2021, while the historical minimum was 65.5°F on 2023.

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 67.8°F, the minimum temperature may reach 67.0°F, and the maximum might stay at 68.7°F.

Daily water temperature in Belfast

Date Current Year

actual* / forecast**

last year 10 years average
Aug 11 70.2°F 68.7°F 69.0°F
Aug 12 70.6°F 70.4°F 69.5°F
Aug 13 69.8°F 72.6°F 69.3°F
Aug 14 71.1°F 72.3°F 69.3°F
Aug 15 70.9°F 72.2°F 69.5°F
Aug 16 71.3°F 71.5°F 69.3°F
Aug 17 70.0°F 71.3°F 69.2°F
Aug 18 69.1°F 70.7°F 68.9°F
Aug 19 67.9°F 69.3°F 68.5°F
Aug 20 68.1°F 68.0°F 68.6°F
Aug 21 69.6°F 67.4°F 68.5°F
Aug 22 68.9°F 68.5°F 68.3°F
Aug 23 68.0°F 69.4°F 68.5°F
Aug 24 68.6°F 67.6°F 68.1°F
Aug 25 68.8°F 67.4°F 68.2°F
Aug 26 68.6°F 66.8°F 68.1°F
Aug 27 68.7°F 69.6°F 68.1°F
Aug 28 67.9°F 68.0°F 67.3°F
Aug 29 67.7°F 67.2°F 67.1°F
Aug 30 67.3°F 66.9°F 66.7°F
Aug 31 67.5°F 68.3°F 66.9°F
Sep 1 67.0°F 68.0°F 66.4°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 Belfast by month

In an average year, Belfast offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Belfast was recorded on August 12, 2020, reaching a 73.6°F. While the coldest temperature occurred on January 1, 2018, dipping to 32.0°F. The average readings by season are 33.1°F in Winter, 36.8°F in Spring, 61.5°F in Summer, and 55.1°F in Autumn.