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Saint Marys
Water Temperature in the Celtic Sea in Saint Marys, England: Current, Historical Data and Forecast
On this page, you will find comprehensive information about the sea temperature in Saint Marys in England, 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 Saint Marys
9.7°C
TODAY
10.0°C
YESTERDAY
10.6°C
A WEEK AGO
Analysis, Historical Data, and Forecast of Water Temperature
Today sea water temperature in the Celtic Sea in Saint Marys is 9.7°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 Saint Marys Over the Last 30 Days
The water temperature in Saint Marys 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 Saint Marys will remain nearly unchanged in the coming days, its value will be 9.6°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 Saint Marys 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 4 | 10.6°C | 10.3°C | |
| Mar 5 | 10.5°C | 10.3°C | |
| Mar 6 | 10.6°C | 10.3°C | |
| Mar 7 | 10.2°C | 10.0°C | |
| Mar 8 | 10.2°C | 9.8°C | |
| Mar 9 | 9.7°C | 9.5°C | |
| Mar 10 | 10.0°C | 9.3°C | |
| Mar 11 | 9.5°C | 10.0°C | |
| Mar 12 | 9.3°C | 9.6°C | |
| Mar 13 | 9.5°C | 9.6°C | |
| Mar 14 | 9.5°C | 9.6°C | |
| Mar 15 | 9.3°C | 9.6°C | |
| Mar 16 | 9.8°C | 9.6°C | |
| Mar 17 | 9.8°C | 9.6°C | |
| Mar 18 | 9.5°C | 9.6°C | |
| Mar 19 | 10.0°C | 9.6°C |
Sea Temperature in Saint Marys Throughout the Year
Throughout the year, the sea temperature in Saint Marys never exceeds 64°F (18°C).
Below is the annual chart of sea temperature changes in the Celtic Sea in Saint Marys.
January
| Minimum | Average | Maximum |
|---|---|---|
| 9°C | 10.5°C | 12°C |
February
| Minimum | Average | Maximum |
|---|---|---|
| 9°C | 10.5°C | 12°C |
March
| Minimum | Average | Maximum |
|---|---|---|
| 8°C | 10°C | 12°C |
April
| Minimum | Average | Maximum |
|---|---|---|
| 9°C | 11°C | 13°C |
May
| Minimum | Average | Maximum |
|---|---|---|
| 10°C | 12°C | 14°C |
June
| Minimum | Average | Maximum |
|---|---|---|
| 12°C | 15°C | 18°C |
July
| Minimum | Average | Maximum |
|---|---|---|
| 13°C | 16.5°C | 20°C |
August
| Minimum | Average | Maximum |
|---|---|---|
| 15°C | 17.5°C | 20°C |
September
| Minimum | Average | Maximum |
|---|---|---|
| 14°C | 16.5°C | 19°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 |
|---|---|---|
| 10°C | 11.5°C | 13°C |
Monthly Water Temperature Histogram for Celtic Sea in Saint Marys
You can explore detailed data on how the water temperature in Saint Marys varies each month:
What Beaches Are There In and Around Saint Marys?
Porth Mellon Beach
Porth Mellon Beach is a 4-stars sandy beach, is located directly in Saint Marys. There is parking. There are restrooms. There are cafés. Porth Mellon 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.
Porth Hellick Beach
Porth Hellick Beach is a 4-stars sandy beach, is located directly in Saint Marys. There is parking. There are cafés. Porth Hellick 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.
Town Beach
Town Beach is a 3-stars sandy beach, is located directly in Saint Marys. There are cafés. Town 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.
Hugh Town Beach
Hugh Town Beach is a 4-stars sandy beach, is located directly in Saint Marys. There is parking. There are restrooms. There are cafés. Hugh Town 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.
Porthcressa Beach
Porthcressa Beach is a 4-stars sandy beach, is located directly in Saint Marys. There is parking. There are cafés. Porthcressa 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.
Old Town Bay Beach
Old Town Bay Beach is a 4-stars sandy beach, is located directly in Saint Marys. There is parking. There are restrooms. There are cafés. Old Town Bay 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.
Porth Minick Beach
Porth Minick Beach is a 1-stars sandy beach, is located directly in Saint Marys.
Little Porth Beach
Little Porth Beach is a 3-stars sandy beach, located in a 2 km (1 miles) radius of Saint Marys. There are restrooms. There are cafés. Snorkeling is possible.
Bar Point
Bar Point is a 2-stars sandy beach, located in a 2 km (1 miles) radius of Saint Marys. Snorkeling is possible.
Pelistry Bay Beach
Pelistry Bay Beach is a 4-stars sandy beach, located in a 2 km (1 miles) radius of Saint Marys. There is parking. There are cafés. Pelistry Bay 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.
Tolls Island
Tolls Island is a 1-stars sandy beach, located in a 2 km (1 miles) radius of Saint Marys.
Watermill Cove Beach
Watermill Cove Beach is a 3-stars sandy beach, located in a 2 km (1 miles) radius of Saint Marys. There is parking. There are cafés. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Apple Tree Beach
Apple Tree Beach is a 4-stars sandy beach, located in a 4 km (2 miles) radius of Saint Marys. There is parking. There are cafés. Apple Tree 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.
Pentle Bay Beach
Pentle Bay Beach is a 3-stars sandy beach, located in a 4 km (2 miles) radius of Saint Marys. There is parking. There are cafés. Pentle Bay 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.
Samson
Samson is a 3-stars sandy beach, located in a 4 km (2 miles) radius of Saint Marys. There are lifeguards on the beach. There is parking. There are restrooms.
Covean Beach
Covean Beach is a 4-stars sandy beach, located in a 4 km (2 miles) radius of Saint Marys. There is parking. There are cafés. Covean 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.
Gugh
Gugh is a 1-stars sandy beach, located in a 4 km (2 miles) radius of Saint Marys.
Rushy Bay Beach
Rushy Bay Beach is a 3-stars sandy beach, located in a 5 km (3 miles) radius of Saint Marys. There is parking. There are cafés. Rushy Bay 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.
Green Bay Beach
Green Bay Beach is a 3-stars sandy beach, located in a 5 km (3 miles) radius of Saint Marys. There is parking. Green Bay 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.
Tresco
Tresco is a 1-stars pebble beach, located in a 5 km (3 miles) radius of Saint Marys.
Saint Marys Weather
MARCH 12
5°C / 8°C
light rainhumidity: 64% | wind: 8 km/h
MARCH 13
7°C / 8°C
light rainhumidity: 61% | wind: 4 km/h
MARCH 14
5°C / 8°C
light rainhumidity: 64% | wind: 8 km/h
MARCH 15
5°C / 8°C
overcast clouds: 85-100%humidity: 62% | wind: 9 km/h
Sea Temperature in the Celtic Sea in Saint Marys: General Trends and Swimming Opportunities
The coastal regions of England, United Kingdom generally experience a temperate maritime climate, characterized by relatively mild, damp weather conditions with wet winters and cooler summers compared to inland areas. Significantly, these regions benefit from fewer temperature extremes due to the moderating influence of the nearby sea.
Saint Marys is located in Europe in the Northern Hemisphere at a latitude of 50 degrees, along the shores of the Celtic Sea. Saint Marys lies within the England in United Kingdom.
The average annual daytime air temperature in Saint Marys is 16°C (61°F), with the average nighttime temperature being 9°C (48°F). The highest average daily temperature occurs in August, reaching 22°C (72°F), while the lowest is in January at 10°C (49°F). As for nighttime temperatures, the minimum average temperature of 5°C (40°F) is recorded in February, and the maximum is in July, reaching 14°C (58°F).
According to historical data, Saint Marys experiences 136 rainy days per year, which accounts for 37 percent of all days in the year. On average, there are 11 rainy days each month. The wettest month is November, with 15 rainy days and 123 mm (4.8 inches) of precipitation, while the driest month is July, which typically has 8 rainy days and only 58 mm (2.3 inches) of precipitation.
The average annual water temperature in Celtic Sea in Saint Marys is 13°C (55°F). In March, the water reaches its lowest point of the year at 8°C (46°F), while in July, it peaks at 20°C (68°F). In Saint Marys, the water temperature in the Celtic Sea never consistently reaches a comfortable level for swimming in any month.
Geographical Location of Saint Marys
Nearby Cities
Frequently Asked Questions About Saint Marys and its Water Temperatures
What is the current sea temperature in Saint Marys?
The water temperature today in the Celtic Sea in Saint Marys is 50°F (9.7°C).
In which months is the water temperature in Saint Marys comfortable for swimming?
It cannot be guaranteed that the water temperature in Saint Marys will be comfortable for swimming in any month of the year.
What is the water temperature in Saint Marys during the winter?
The water temperature in the Celtic Sea in Saint Marys during the winter ranges from 9°C to 13°C (48°F to 55°F).
What is the water temperature in Saint Marys during the spring?
The water temperature in the Celtic Sea in Saint Marys during the spring ranges from 8°C to 14°C (46°F to 57°F).
What is the water temperature in Saint Marys during the summer?
The water temperature in the Celtic Sea in Saint Marys during the summer ranges from 12°C to 20°C (54°F to 68°F).
What is the water temperature in Saint Marys during the fall?
The water temperature in the Celtic Sea in Saint Marys during the fall ranges from 11°C to 19°C (52°F to 66°F).
Is it possible to swim in the sea in Saint Marys at any time of the year?
In Saint Marys, 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 Saint Marys in the next month?
In April, the water temperature in the Celtic Sea in Saint Marys will range between 48°F (9°C) and 55°F (13°C)