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 5.47°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.

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.

41.8

°F

December 21, 13:02

Trend:

stable

Yesterday:

41.7°F

Tomorrow:

41.7°F

Sunrise:

07:10

Sunset:

16:00

Day Length:

8 h. 50 min.

Belfast in December

Minimum:

37.3°F

Average:

39.8°F

Maximum:

41.5°F

Sea water temperature in Belfast today

As of now, in Belfast, the water temperature is 41.8°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 1.5°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 fall a bit.

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 is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 44.7°F on 2022, while the historical minimum was 41.1°F on 2018.

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 minimum recorded over the past years. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 41.1°F, the minimum temperature may reach 40.6°F, and the maximum might stay at 41.7°F.

Daily water temperature in Belfast

Date	Current Year actual* / forecast**	last year	10 years average
Dec 7	45.5°F	44.6°F	45.8°F
Dec 8	44.9°F	44.4°F	45.3°F
Dec 9	44.5°F	44.5°F	45.1°F
Dec 10	44.3°F	44.3°F	45.0°F
Dec 11	44.1°F	44.2°F	44.9°F
Dec 12	43.9°F	43.6°F	44.6°F
Dec 13	44.1°F	43.8°F	44.6°F
Dec 14	43.8°F	41.2°F	44.1°F
Dec 15	43.1°F	41.5°F	43.7°F
Dec 16	43.1°F	42.2°F	43.7°F
Dec 17	42.8°F	42.0°F	43.5°F
Dec 18	41.0°F	42.5°F	43.6°F
Dec 19	41.0°F	45.5°F	43.7°F
Dec 20	41.7°F	45.1°F	43.3°F
Dec 21	41.8°F	42.4°F	43.4°F
Dec 22	41.7°F	42.9°F	43.2°F
Dec 23	41.5°F	42.4°F	43.0°F
Dec 24	41.3°F	41.9°F	42.8°F
Dec 25	41.1°F	41.9°F	42.6°F
Dec 26	41.0°F	41.4°F	42.5°F
Dec 27	40.8°F	41.3°F	42.3°F
Dec 28	40.6°F	41.2°F	42.2°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 March 2, 2015, dipping to 32.0°F. The average readings by season are 39.8°F in Winter, 41.6°F in Spring, 60.3°F in Summer, and 55.6°F in Autumn.