What is the current water temperature in Belfast?

Q: What is the current water temperature in Belfast?

As of now, in Belfast, the water temperature is 16.46°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it.

United States > Belfast

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.

61.6

°F

July 26, 04:25

Trend:

stable

Yesterday:

60.4°F

Tomorrow:

61.4°F

Sunrise:

05:16

Sunset:

20:08

Day Length:

14 h. 52 min.

Belfast in August

Minimum:

36.9°F

Average:

40.0°F

Maximum:

42.7°F

Sea water temperature in Belfast today

As of now, in Belfast, the water temperature is 61.6°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 2.7°F lower than the average recorded on this particular day in recent years. Since yesterday, there was a noticeable increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to fall a bit.

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 68.9°F on 2023, while the historical minimum was 59.8°F on 2017.

latest data

last year

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 histoorical minimum and others when it was close to the historical maximum. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 61.8°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
Jul 12	65.7°F	60.2°F	61.5°F
Jul 13	65.4°F	59.7°F	62.2°F
Jul 14	63.8°F	61.1°F	62.5°F
Jul 15	64.6°F	59.6°F	62.8°F
Jul 16	63.5°F	60.9°F	62.6°F
Jul 17	63.7°F	61.8°F	62.7°F
Jul 18	61.7°F	61.3°F	62.6°F
Jul 19	60.9°F	62.3°F	62.2°F
Jul 20	59.8°F	60.4°F	62.8°F
Jul 21	59.6°F	59.6°F	63.1°F
Jul 22	59.1°F	62.1°F	63.4°F
Jul 23	59.3°F	60.9°F	62.7°F
Jul 24	59.6°F	60.8°F	63.1°F
Jul 25	60.4°F	60.5°F	63.7°F
Jul 26	61.6°F	63.9°F	64.3°F
Jul 27	61.4°F	62.3°F	64.1°F
Jul 28	61.6°F	60.9°F	64.2°F
Jul 29	61.8°F	62.5°F	64.5°F
Jul 30	62.2°F	62.3°F	64.8°F
Jul 31	61.9°F	63.2°F	64.5°F
Aug 1	61.8°F	62.3°F	64.5°F
Aug 2	62.0°F	62.9°F	64.7°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 July 30, 2023, reaching a 71.2°F. While the coldest temperature occurred on February 26, 2025, dipping to 32.2°F. The average readings by season are 39.6°F in Winter, 41.9°F in Spring, 60.8°F in Summer, and 55.8°F in Autumn.