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Castlerock
Water Temperature in the Irish Sea in Castlerock, Northen Ireland: Current, Historical Data and Forecast
On this page, you will find comprehensive information about the sea temperature in Castlerock 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 Castlerock
8.6°C
TODAY
7.6°C
YESTERDAY
7.3°C
A WEEK AGO
Analysis, Historical Data, and Forecast of Water Temperature
Today sea water temperature in the Irish Sea in Castlerock is 8.6°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 Castlerock Over the Last 30 Days
The water temperature in Castlerock today is lower than both a week ago and a month ago. Today's sea temperature is generally in line with historical values for this day.
According to our forecast, the sea temperature in Castlerock will remain nearly unchanged in the coming days, its value will be 8.0°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 Castlerock 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 |
|---|---|---|---|
| Mar 6 | 7.3°C | 7.5°C | |
| Mar 7 | 7.3°C | 7.8°C | |
| Mar 8 | 7.4°C | 7.0°C | |
| Mar 9 | 7.4°C | 7.3°C | |
| Mar 10 | 7.5°C | 8.0°C | |
| Mar 11 | 7.2°C | 7.8°C | |
| Mar 12 | 7.6°C | 8.3°C | |
| Mar 13 | 8.3°C | 8.0°C | |
| Mar 14 | 7.8°C | 8.5°C | |
| Mar 15 | 8.0°C | 8.4°C | |
| Mar 16 | 8.0°C | 8.3°C | |
| Mar 17 | 7.3°C | 8.1°C | |
| Mar 18 | 7.5°C | 8.0°C | |
| Mar 19 | 7.8°C | 8.0°C | |
| Mar 20 | 8.0°C | 8.0°C | |
| Mar 21 | 8.3°C | 8.0°C |
Sea Temperature in Castlerock Throughout the Year
Throughout the year, the sea temperature in Castlerock never exceeds 64°F (18°C).
Below is the annual chart of sea temperature changes in the Irish Sea in Castlerock.
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 | 12°C | 15°C |
July
| Minimum | Average | Maximum |
|---|---|---|
| 11°C | 13.5°C | 16°C |
August
| Minimum | Average | Maximum |
|---|---|---|
| 12°C | 14°C | 16°C |
September
| Minimum | Average | Maximum |
|---|---|---|
| 13°C | 14.5°C | 16°C |
October
| Minimum | Average | Maximum |
|---|---|---|
| 11°C | 13°C | 15°C |
November
| Minimum | Average | Maximum |
|---|---|---|
| 10°C | 12°C | 14°C |
December
| Minimum | Average | Maximum |
|---|---|---|
| 9°C | 11°C | 13°C |
Monthly Water Temperature Histogram for Irish Sea in Castlerock
You can explore detailed data on how the water temperature in Castlerock varies each month:
What Beaches Are There In and Around Castlerock?
Castlerock Beach
Castlerock Beach is a 5-stars sandy beach, is located directly in Castlerock. It has been awarded the prestigious Blue Flag, ensuring high environmental and quality standards. There are lifeguards on the beach. There are restrooms. There are cafés. Castlerock Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. Snorkeling is possible. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
The Barmouth
The Barmouth is a 3-stars sandy beach, is located directly in Castlerock. There is parking. There are shops. There are cafés. It is suitable for surfing.
Downhill Strand
Downhill Strand is a 2-stars sandy beach, is located directly in Castlerock. It has been awarded the prestigious Blue Flag, ensuring high environmental and quality standards.
Downhill Beach
Downhill Beach is a 5-stars sandy beach, located in a 2 km (1 miles) radius of Castlerock. It has been awarded the prestigious Blue Flag, ensuring high environmental and quality standards. There are lifeguards on the beach. There is parking. There are restrooms. There are cafés. Downhill Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. It is suitable for surfing. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Portstewart Strand
Portstewart Strand is a 1-stars sandy beach, located in a 3 km (2 miles) radius of Castlerock.
The Strand Beach
The Strand Beach is a 5-stars sandy beach, located in a 4 km (2 miles) radius of Castlerock. It has been awarded the prestigious Blue Flag, ensuring high environmental and quality standards. There is parking. There are restrooms. There are cafés. The Strand Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. It is suitable for surfing. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
The Berne
The Berne is a 1-stars sandy beach, located in a 4 km (2 miles) radius of Castlerock.
Wee Beach
Wee Beach is a 1-stars sandy beach, located in a 4 km (2 miles) radius of Castlerock.
Magilligan Beach
Magilligan Beach is a 5-stars sandy beach, located in a 5 km (3 miles) radius of Castlerock. It has been awarded the prestigious Blue Flag, ensuring high environmental and quality standards. There are lifeguards on the beach. There is parking. There are restrooms. Magilligan Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. It is suitable for surfing. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Benone Beach
Benone Beach is a 1-stars sandy beach, located in a 5 km (3 miles) radius of Castlerock.
Portstewart Strand And Barmouth
Portstewart Strand And Barmouth is a 1-stars sandy beach, located in a 5 km (3 miles) radius of Castlerock.
Benone Strand
Benone Strand is a 2-stars sandy beach, located in a 6 km (4 miles) radius of Castlerock. There is parking. There are cafés. It is suitable for surfing.
West Strand Beach
West Strand Beach is a 5-stars sandy beach, located in a 9 km (6 miles) radius of Castlerock. It has been awarded the prestigious Blue Flag, ensuring high environmental and quality standards. There is parking. There are restrooms. There are cafés. It is suitable for surfing. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Portrush Coastal Zone
Portrush Coastal Zone is a 2-stars sandy beach, located in a 10 km (6 miles) radius of Castlerock. There are restrooms.
Potrush East Strand
Potrush East Strand is a 5-stars sandy beach, located in a 10 km (6 miles) radius of Castlerock. It has been awarded the prestigious Blue Flag, ensuring high environmental and quality standards. There is parking. There are restrooms. There are cafés. It is suitable for surfing. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Castlerock Weather
MARCH 15
6°C / 8°C
overcast clouds: 85-100%humidity: 67% | wind: 2 km/h
MARCH 16
3°C / 9°C
scattered clouds: 25-50%humidity: 74% | wind: 3 km/h
MARCH 17
5°C / 8°C
scattered clouds: 25-50%humidity: 80% | wind: 6 km/h
Sea Temperature in the Irish Sea in Castlerock: 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.
Castlerock is located in Europe in the Northern Hemisphere at a latitude of 55 degrees, along the shores of the Irish Sea. Castlerock lies within the Northen Ireland in United Kingdom.
The average annual daytime air temperature in Castlerock 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, Castlerock 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 Castlerock is 11°C (52°F). In March, the water reaches its lowest point of the year at 6°C (43°F), while in July, it peaks at 16°C (61°F). In Castlerock, the water temperature in the Irish Sea never consistently reaches a comfortable level for swimming in any month.
Geographical Location of Castlerock
Nearby Cities
Frequently Asked Questions About Castlerock and its Water Temperatures
What is the current sea temperature in Castlerock?
The water temperature today in the Irish Sea in Castlerock is 48°F (8.6°C).
In which months is the water temperature in Castlerock comfortable for swimming?
It cannot be guaranteed that the water temperature in Castlerock will be comfortable for swimming in any month of the year.
What is the water temperature in Castlerock during the winter?
The water temperature in the Irish Sea in Castlerock during the winter ranges from 7°C to 13°C (45°F to 55°F).
What is the water temperature in Castlerock during the spring?
The water temperature in the Irish Sea in Castlerock during the spring ranges from 6°C to 12°C (43°F to 54°F).
What is the water temperature in Castlerock during the summer?
The water temperature in the Irish Sea in Castlerock during the summer ranges from 9°C to 16°C (48°F to 61°F).
What is the water temperature in Castlerock during the fall?
The water temperature in the Irish Sea in Castlerock during the fall ranges from 10°C to 16°C (50°F to 61°F).
Is it possible to swim in the sea in Castlerock at any time of the year?
In Castlerock, the Irish Sea is quite cold, and swimming is almost impossible as the water temperature never reaches 21°C (70°F).
What sea temperatures can I expect in Castlerock in the next month?
In April, the water temperature in the Irish Sea in Castlerock will range between 45°F (7°C) and 50°F (10°C)