Search for cities, countries, lakes and rivers
Belfast
Water Temperature in the Irish Sea in Belfast, Northen Ireland: Current, Historical Data and Forecast
On this page, you will find comprehensive information about the sea temperature in Belfast in Northen Ireland, including current readings, historical data and trends, monthly averages, as well as weather forecasts and upcoming temperature predictions. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Current Water Temperature in Belfast
8.1°C
TODAY
9.1°C
YESTERDAY
7.5°C
A WEEK AGO
Analysis, Historical Data, and Forecast of Water Temperature
Today sea water temperature in the Irish Sea in Belfast is 8.1°C. This is still cool water, suitable only for experienced swimmers or those accustomed to cold water. Swimming in such conditions is possible, but not recommended for prolonged periods. Extra caution should be taken during extended exposure, as the cold water can cause heat loss and lead to hypothermia. For added comfort, special clothing can be used.
It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart for Irish Sea in Belfast Over the Last 30 Days
The water temperature in Belfast today is lower than both a week ago and a month ago. Today's sea temperature is slightly lower than on the same day in previous years.
According to our forecast, the sea temperature in Belfast will remain nearly unchanged in the coming days, its value will be 8.6°C.
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts across United Kingdom to enhance accuracy.
Water temperature data for Belfast and nearby towns and resorts is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| Apr 8 | 7.5°C | 7.8°C | |
| Apr 9 | 8.2°C | 8.0°C | |
| Apr 10 | 7.7°C | 8.3°C | |
| Apr 11 | 8.0°C | 8.3°C | |
| Apr 12 | 7.9°C | 8.0°C | |
| Apr 13 | 8.2°C | 8.3°C | |
| Apr 14 | 9.1°C | 9.0°C | |
| Apr 15 | 9.2°C | 8.8°C | |
| Apr 16 | 8.8°C | 8.2°C | |
| Apr 17 | 9.3°C | 8.3°C | |
| Apr 18 | 9.0°C | 8.4°C | |
| Apr 19 | 8.5°C | 8.4°C | |
| Apr 20 | 8.5°C | 8.4°C | |
| Apr 21 | 8.5°C | 8.4°C | |
| Apr 22 | 9.0°C | 8.5°C | |
| Apr 23 | 9.0°C | 8.6°C |
Sea Temperature in Belfast Throughout the Year
Throughout the year, the sea temperature in Belfast never exceeds 64°F (18°C).
Below is the annual chart of sea temperature changes in the Irish Sea in Belfast.
January
| Minimum | Average | Maximum |
|---|---|---|
| 7°C | 8.5°C | 10°C |
February
| Minimum | Average | Maximum |
|---|---|---|
| 7°C | 8.5°C | 10°C |
March
| Minimum | Average | Maximum |
|---|---|---|
| 6°C | 8°C | 10°C |
April
| Minimum | Average | Maximum |
|---|---|---|
| 7°C | 8.5°C | 10°C |
May
| Minimum | Average | Maximum |
|---|---|---|
| 8°C | 10°C | 12°C |
June
| Minimum | Average | Maximum |
|---|---|---|
| 9°C | 11.5°C | 14°C |
July
| Minimum | Average | Maximum |
|---|---|---|
| 10°C | 13°C | 16°C |
August
| Minimum | Average | Maximum |
|---|---|---|
| 12°C | 14°C | 16°C |
September
| Minimum | Average | Maximum |
|---|---|---|
| 12°C | 14.5°C | 17°C |
October
| Minimum | Average | Maximum |
|---|---|---|
| 12°C | 13.5°C | 15°C |
November
| Minimum | Average | Maximum |
|---|---|---|
| 11°C | 13°C | 15°C |
December
| Minimum | Average | Maximum |
|---|---|---|
| 9°C | 11°C | 13°C |
Monthly Water Temperature Histogram for Irish Sea in Belfast
You can explore detailed data on how the water temperature in Belfast varies each month:
What Beaches Are There In and Around Belfast?
Gideons Green
Gideons Green is a 2-stars sandy beach, located in a 8 km (5 miles) radius of Belfast. There is parking.
Newtownabbey Bay Beach
Newtownabbey Bay Beach is a 2-stars sandy beach, located in a 9 km (6 miles) radius of Belfast. There is parking.
Seapark Bay Beach
Seapark Bay Beach is a 2-stars sandy beach, located in a 10 km (6 miles) radius of Belfast. There is parking. There are restrooms.
Belfast Weather
APRIL 16
5°C / 9°C
light rainhumidity: 78% | wind: 6 km/h
APRIL 17
8°C / 9°C
overcast clouds: 85-100%humidity: 88% | wind: 10 km/h
APRIL 18
9°C / 10°C
light rainhumidity: 85% | wind: 11 km/h
APRIL 19
8°C / 10°C
overcast clouds: 85-100%humidity: 79% | wind: 8 km/h
Sea Temperature in the Irish Sea in Belfast: General Trends and Swimming Opportunities
The coastal area of Northern Ireland, United Kingdom, features a temperate maritime climate characterized by relatively mild and damp conditions throughout the year. Winters are generally cool with temperatures averaging around 5°C, while summers are mild, with temperatures usually around 15-20°C, and rainfall is evenly distributed throughout the year.
Belfast is located in Europe in the Northern Hemisphere at a latitude of 55 degrees, along the shores of the Irish Sea. Belfast lies within the Northen Ireland in United Kingdom.
The average annual daytime air temperature in Belfast is 13°C (55°F), with the average nighttime temperature being 7°C (45°F). The highest average daily temperature occurs in July, reaching 18°C (65°F), while the lowest is in January at 8°C (46°F). As for nighttime temperatures, the minimum average temperature of 3°C (37°F) is recorded in February, and the maximum is in August, reaching 12°C (53°F).
According to historical data, Belfast experiences 189 rainy days per year, which accounts for 52 percent of all days in the year. On average, there are 16 rainy days each month. The wettest month is January, with 18 rainy days and 122 mm (4.8 inches) of precipitation, while the driest month is April, which typically has 13 rainy days and only 70 mm (2.7 inches) of precipitation.
The average annual water temperature in Irish Sea in Belfast is 11°C (52°F). In March, the water reaches its lowest point of the year at 6°C (43°F), while in September, it peaks at 17°C (63°F). In Belfast, the water temperature in the Irish Sea never consistently reaches a comfortable level for swimming in any month.
Geographical Location of Belfast
Nearby Cities
Frequently Asked Questions About Belfast and its Water Temperatures
What is the current sea temperature in Belfast?
The water temperature today in the Irish Sea in Belfast is 47°F (8.1°C).
In which months is the water temperature in Belfast comfortable for swimming?
It cannot be guaranteed that the water temperature in Belfast will be comfortable for swimming in any month of the year.
What is the water temperature in Belfast during the winter?
The water temperature in the Irish Sea in Belfast during the winter ranges from 7°C to 13°C (45°F to 55°F).
What is the water temperature in Belfast during the spring?
The water temperature in the Irish Sea in Belfast during the spring ranges from 6°C to 12°C (43°F to 54°F).
What is the water temperature in Belfast during the summer?
The water temperature in the Irish Sea in Belfast during the summer ranges from 9°C to 16°C (48°F to 61°F).
What is the water temperature in Belfast during the fall?
The water temperature in the Irish Sea in Belfast during the fall ranges from 11°C to 17°C (52°F to 63°F).
Is it possible to swim in the sea in Belfast at any time of the year?
In Belfast, the Irish Sea is quite cold, and swimming is almost impossible as the water temperature never reaches 21°C (70°F).
Is Belfast a popular tourist destination for beach vacations?
Belfast has a moderate level of popularity for beach vacations; while it does receive some visitors, it is not among the top seaside destinations, as other locations may offer more favorable conditions.
What sea temperatures can I expect in Belfast in the next month?
In May, the water temperature in the Irish Sea in Belfast will range between 46°F (8°C) and 54°F (12°C)