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

58.1

°F

April 20, 18:26

Trend:

stable

Yesterday:

58.2°F

Tomorrow:

58.1°F

Sunrise:

07:07

Sunset:

17:49

Day Length:

10 h. 42 min.

Belfast in April

Minimum:

60.2°F

Average:

62.5°F

Maximum:

64.2°F

Sea water temperature in Belfast today

As of now, in Belfast, the water temperature is 58.1°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 0.3°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 considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 59.7°F on 2021, while the historical minimum was 56.1°F on 2020.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 57.9°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Belfast

Date Current Year

actual* / forecast**

last year 10 years average
Apr 6 60.7°F 61.8°F 60.4°F
Apr 7 60.3°F 62.0°F 60.3°F
Apr 8 60.0°F 61.9°F 59.9°F
Apr 9 59.2°F 61.3°F 59.7°F
Apr 10 59.5°F 60.6°F 59.7°F
Apr 11 59.9°F 59.7°F 59.5°F
Apr 12 59.1°F 59.8°F 59.5°F
Apr 13 59.8°F 59.6°F 59.5°F
Apr 14 59.3°F 60.2°F 59.2°F
Apr 15 59.0°F 60.0°F 59.0°F
Apr 16 58.5°F 59.9°F 59.0°F
Apr 17 58.2°F 59.8°F 58.9°F
Apr 18 58.1°F 59.6°F 58.6°F
Apr 19 58.2°F 59.2°F 58.5°F
Apr 20 58.1°F 59.3°F 58.4°F
Apr 21 58.1°F 59.2°F 58.5°F
Apr 22 58.0°F 59.1°F 58.3°F
Apr 23 58.0°F 58.9°F 58.4°F
Apr 24 57.9°F 58.6°F 58.2°F
Apr 25 57.9°F 57.9°F 58.2°F
Apr 26 57.8°F 57.7°F 58.1°F
Apr 27 57.6°F 57.7°F 57.9°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 January 31, 2018, reaching a 69.7°F. While the coldest temperature occurred on August 14, 2022, dipping to 46.6°F. The average readings by season are 62.9°F in Winter, 59.0°F in Spring, 49.9°F in Summer, and 54.1°F in Autumn.