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 9.16°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.

48.5

°F

May 20, 23:08

Trend:

stable

Yesterday:

48.4°F

Tomorrow:

48.4°F

Sunrise:

05:04

Sunset:

20:02

Day Length:

14 h. 58 min.

Belfast in May

Minimum:

38.2°F

Average:

40.6°F

Maximum:

43.3°F

Sea water temperature in Belfast today

As of now, in Belfast, the water temperature is 48.5°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 0.9°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 notably higher than the average recorded over the past two weeks, indicating a significant warming 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 53.5°F on 2024, while the historical minimum was 46.2°F on 2019.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 49.6°F, with minimum temperature starting at 48.4°F, while the maximum might reach 50.3°F.

Daily water temperature in Belfast

Date	Current Year actual* / forecast**	last year	10 years average
May 6	45.1°F	46.7°F	45.6°F
May 7	45.3°F	48.3°F	45.8°F
May 8	45.8°F	47.3°F	46.3°F
May 9	45.9°F	46.8°F	46.3°F
May 10	46.1°F	46.7°F	46.5°F
May 11	46.4°F	47.1°F	46.9°F
May 12	47.1°F	47.7°F	47.5°F
May 13	47.0°F	47.8°F	47.5°F
May 14	47.4°F	48.0°F	47.8°F
May 15	49.2°F	48.2°F	48.1°F
May 16	48.2°F	47.8°F	48.0°F
May 17	48.5°F	47.7°F	48.1°F
May 18	48.5°F	50.7°F	48.5°F
May 19	48.4°F	51.6°F	48.7°F
May 20	48.5°F	53.5°F	49.4°F
May 21	48.4°F	52.6°F	49.3°F
May 22	49.1°F	51.6°F	50.0°F
May 23	49.2°F	52.5°F	50.1°F
May 24	49.8°F	54.9°F	50.7°F
May 25	50.0°F	56.1°F	50.9°F
May 26	50.3°F	56.2°F	51.2°F
May 27	50.3°F	55.5°F	51.2°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, 41.7°F in Spring, 60.5°F in Summer, and 55.7°F in Autumn.