Search for cities, countries, lakes and rivers
South Stack
Water Temperature in the Celtic Sea in South Stack, Wales: Current, Historical Data and Forecast
On this page, you will find comprehensive information about the sea temperature in South Stack in Wales, 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 South Stack
9.0°C
TODAY
9.5°C
YESTERDAY
9.4°C
A WEEK AGO
Analysis, Historical Data, and Forecast of Water Temperature
Today sea water temperature in the Celtic Sea in South Stack is 9°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 Celtic Sea in South Stack Over the Last 30 Days
The water temperature in South Stack 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 South Stack will remain nearly unchanged in the coming days, its value will be 9.2°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 South Stack 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 17 | 9.4°C | 9.0°C | |
| Apr 18 | 9.0°C | 9.0°C | |
| Apr 19 | 9.0°C | 8.5°C | |
| Apr 20 | 9.1°C | 9.3°C | |
| Apr 21 | 9.2°C | 9.0°C | |
| Apr 22 | 8.8°C | 9.3°C | |
| Apr 23 | 9.5°C | 8.8°C | |
| Apr 24 | 9.0°C | 9.0°C | |
| Apr 25 | 9.5°C | 9.1°C | |
| Apr 26 | 9.3°C | 9.1°C | |
| Apr 27 | 9.5°C | 9.1°C | |
| Apr 28 | 9.0°C | 9.1°C | |
| Apr 29 | 9.3°C | 9.1°C | |
| Apr 30 | 9.0°C | 9.1°C | |
| May 1 | 9.8°C | 9.2°C | |
| May 2 | 9.3°C | 9.2°C |
Sea Temperature in South Stack Throughout the Year
Throughout the year, the sea temperature in South Stack never exceeds 64°F (18°C).
Below is the annual chart of sea temperature changes in the Celtic Sea in South Stack.
January
| Minimum | Average | Maximum |
|---|---|---|
| 7°C | 9°C | 11°C |
February
| Minimum | Average | Maximum |
|---|---|---|
| 7°C | 8.5°C | 10°C |
March
| Minimum | Average | Maximum |
|---|---|---|
| 7°C | 8.5°C | 10°C |
April
| Minimum | Average | Maximum |
|---|---|---|
| 7°C | 9°C | 11°C |
May
| Minimum | Average | Maximum |
|---|---|---|
| 8°C | 10.5°C | 13°C |
June
| Minimum | Average | Maximum |
|---|---|---|
| 11°C | 13.5°C | 16°C |
July
| Minimum | Average | Maximum |
|---|---|---|
| 12°C | 14.5°C | 17°C |
August
| Minimum | Average | Maximum |
|---|---|---|
| 14°C | 15.5°C | 17°C |
September
| Minimum | Average | Maximum |
|---|---|---|
| 14°C | 16°C | 18°C |
October
| Minimum | Average | Maximum |
|---|---|---|
| 13°C | 15°C | 17°C |
November
| Minimum | Average | Maximum |
|---|---|---|
| 11°C | 13°C | 15°C |
December
| Minimum | Average | Maximum |
|---|---|---|
| 8°C | 10.5°C | 13°C |
Monthly Water Temperature Histogram for Celtic Sea in South Stack
You can explore detailed data on how the water temperature in South Stack varies each month:
What Beaches Are There In and Around South Stack?
Porth Dafarch Beach
Porth Dafarch Beach is a 5-stars sandy beach, located in a 3 km (2 miles) radius of South Stack. It has been awarded the prestigious Blue Flag, ensuring high environmental and quality standards. There is parking. There are restrooms. There are cafés. Snorkeling is possible. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Beach Holyhead
Beach Holyhead is a 1-stars sandy beach, located in a 3 km (2 miles) radius of South Stack.
Porth Rhwydau Beach
Porth Rhwydau Beach is a 3-stars sandy beach, located in a 3 km (2 miles) radius of South Stack. There is parking. Porth Rhwydau Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Newry Beach
Newry Beach is a 3-stars sandy beach, located in a 4 km (2 miles) radius of South Stack. There is parking. There are cafés. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Penrhos Beach
Penrhos Beach is a 4-stars sandy beach, located in a 5 km (3 miles) radius of South Stack. There is parking. There are restrooms. There are cafés. Penrhos 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.
Porth Castell Traeth Beach
Porth Castell Traeth Beach is a 2-stars sandy beach, located in a 6 km (4 miles) radius of South Stack. Snorkeling is possible.
Porth Diana Beach
Porth Diana Beach is a 4-stars sandy beach, located in a 6 km (4 miles) radius of South Stack. There is parking. There are cafés. Porth Diana 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.
Trearddur Bay Beach
Trearddur Bay Beach is a 5-stars sandy beach, located in a 6 km (4 miles) radius of South Stack. 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.
Bae Beddmanarch
Bae Beddmanarch is a 3-stars sandy beach, located in a 7 km (4 miles) radius of South Stack. There is parking. There are restrooms. There are cafés.
Porth Tywyn Mawr Beach
Porth Tywyn Mawr Beach is a 3-stars sandy beach, located in a 8 km (5 miles) radius of South Stack. There is parking. It is suitable for surfing. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Traeth Penial
Traeth Penial is a 2-stars sandy beach, located in a 9 km (6 miles) radius of South Stack. There is parking.
Borthwen Beach
Borthwen Beach is a 5-stars sandy beach, located in a 9 km (6 miles) radius of South Stack. There is parking. There are restrooms. There are cafés. Borthwen Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. Snorkeling is possible. It is suitable for surfing. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Traeth Borth Wen
Traeth Borth Wen is a 4-stars sandy beach, located in a 9 km (6 miles) radius of South Stack. There is parking. There are restrooms. There are cafés. Traeth Borth Wen is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. Snorkeling is possible. It is suitable for surfing.
South Stack Weather
APRIL 25
10°C / 14°C
overcast clouds: 85-100%humidity: 80% | wind: 2 km/h
APRIL 26
9°C / 14°C
broken clouds: 51-84%humidity: 88% | wind: 5 km/h
APRIL 27
10°C / 18°C
broken clouds: 51-84%humidity: 83% | wind: 3 km/h
APRIL 28
11°C / 11°C
overcast clouds: 85-100%humidity: 88% | wind: 1 km/h
Sea Temperature in the Celtic Sea in South Stack: General Trends and Swimming Opportunities
The climate in the coastal regions of Wales, United Kingdom, is generally mild and rainy with moderate temperatures. Due to being surrounded by the sea, these areas usually have cooler summers, warmer winters, and a greater level of humidity compared to the inland regions.
South Stack is located in Europe in the Northern Hemisphere at a latitude of 53 degrees, along the shores of the Celtic Sea. South Stack lies within the Wales in United Kingdom.
The average annual daytime air temperature in South Stack is 13°C (55°F), with the average nighttime temperature being 7°C (45°F). The highest average daily temperature occurs in July, reaching 20°C (67°F), while the lowest is in February at 8°C (47°F). As for nighttime temperatures, the minimum average temperature of 2°C (36°F) is recorded in February, and the maximum is in July, reaching 13°C (55°F).
According to historical data, South Stack experiences 165 rainy days per year, which accounts for 45 percent of all days in the year. On average, there are 14 rainy days each month. The wettest month is November, with 17 rainy days and 110 mm (4.3 inches) of precipitation, while the driest month is July, which typically has 11 rainy days and only 70 mm (2.8 inches) of precipitation.
The average annual water temperature in Celtic Sea in South Stack is 12°C (54°F). In January, the water reaches its lowest point of the year at 7°C (45°F), while in September, it peaks at 18°C (64°F). In South Stack, the water temperature in the Celtic Sea never consistently reaches a comfortable level for swimming in any month.
Geographical Location of South Stack
Nearby Cities
Frequently Asked Questions About South Stack and its Water Temperatures
What is the current sea temperature in South Stack?
The water temperature today in the Celtic Sea in South Stack is 48°F (9°C).
In which months is the water temperature in South Stack comfortable for swimming?
It cannot be guaranteed that the water temperature in South Stack will be comfortable for swimming in any month of the year.
What is the water temperature in South Stack during the winter?
The water temperature in the Celtic Sea in South Stack during the winter ranges from 7°C to 13°C (45°F to 55°F).
What is the water temperature in South Stack during the spring?
The water temperature in the Celtic Sea in South Stack during the spring ranges from 7°C to 13°C (45°F to 55°F).
What is the water temperature in South Stack during the summer?
The water temperature in the Celtic Sea in South Stack during the summer ranges from 11°C to 17°C (52°F to 63°F).
What is the water temperature in South Stack during the fall?
The water temperature in the Celtic Sea in South Stack during the fall ranges from 11°C to 18°C (52°F to 64°F).
Is it possible to swim in the sea in South Stack at any time of the year?
In South Stack, the Celtic 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 South Stack in the next month?
In May, the water temperature in the Celtic Sea in South Stack will range between 46°F (8°C) and 55°F (13°C)