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Groton
Water Temperature in the Atlantic Ocean in Groton, Connecticut: Current, Historical Data and Forecast
On this page, you will find comprehensive information about the sea temperature in Groton in Connecticut, 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 Groton
36°F
TODAY
36°F
YESTERDAY
37°F
A WEEK AGO
Analysis, Historical Data, and Forecast of Water Temperature
Today sea water temperature in the Atlantic Ocean in Groton is 2.1°F. Such water is extremely cold and not recommended for swimming without proper preparation. In these conditions, the risk of hypothermia is very high, and prolonged exposure to the water can be hazardous to your health. If you decide to swim, it is important to have the appropriate gear, such as a wetsuit. Typically, only experienced swimmers or those who practice winter swimming venture into such waters.
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 Atlantic Ocean in Groton Over the Last 30 Days
The water temperature in Groton 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 Groton will rise slightly in the coming days and reach 38°F.
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 States to enhance accuracy.
Water temperature data for Groton 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 |
|---|---|---|---|
| Feb 15 | 37°F | 38°F | |
| Feb 16 | 36°F | 38°F | |
| Feb 17 | 37°F | 40°F | |
| Feb 18 | 37°F | 38°F | |
| Feb 19 | 37°F | 38°F | |
| Feb 20 | 36°F | 37°F | |
| Feb 21 | 36°F | 38°F | |
| Feb 22 | 36°F | 39°F | |
| Feb 23 | 40 | 36°F | |
| Feb 24 | 40 | 36°F | |
| Feb 25 | 41 | 37°F | |
| Feb 26 | 41 | 37°F | |
| Feb 27 | 40 | 38°F | |
| Feb 28 | 39 | 38°F | |
| Mar 1 | 38 | 38°F | |
| Mar 2 | 39 | 38°F |
Sea Temperature in Groton Throughout the Year
Throughout the year, the sea temperature in Groton exceeds 77°F (25°C) for 0 days, exceeds 72°F (22°C) for 27 days, and exceeds 64°F (18°C) for 116 days.
Below is the annual chart of sea temperature changes in the Atlantic Ocean in Groton.
January
| Minimum | Average | Maximum |
|---|---|---|
| 36°F | 43°F | 50°F |
February
| Minimum | Average | Maximum |
|---|---|---|
| 36°F | 40°F | 45°F |
March
| Minimum | Average | Maximum |
|---|---|---|
| 36°F | 40°F | 45°F |
April
| Minimum | Average | Maximum |
|---|---|---|
| 37°F | 46°F | 54°F |
May
| Minimum | Average | Maximum |
|---|---|---|
| 46°F | 55°F | 63°F |
June
| Minimum | Average | Maximum |
|---|---|---|
| 55°F | 64°F | 73°F |
July
| Minimum | Average | Maximum |
|---|---|---|
| 63°F | 70°F | 77°F |
August
| Minimum | Average | Maximum |
|---|---|---|
| 66°F | 73°F | 79°F |
September
| Minimum | Average | Maximum |
|---|---|---|
| 63°F | 69°F | 75°F |
October
| Minimum | Average | Maximum |
|---|---|---|
| 55°F | 62°F | 68°F |
November
| Minimum | Average | Maximum |
|---|---|---|
| 48°F | 55°F | 63°F |
December
| Minimum | Average | Maximum |
|---|---|---|
| 41°F | 47°F | 54°F |
Monthly Water Temperature Histogram for Atlantic Ocean in Groton
You can explore detailed data on how the water temperature in Groton varies each month:
What Beaches Are There In and Around Groton?
Green Harbor Beach
Green Harbor Beach is a 5-stars sandy beach, located in a 2 km (1 miles) radius of Groton. There are lifeguards on the beach. There is parking. There are restrooms. There are cafés. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Eastern Point Beach
Eastern Point Beach is a 4-stars sandy beach, located in a 3 km (2 miles) radius of Groton. There are lifeguards on the beach. There is parking. There are restrooms. Eastern Point 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.
Ocean Beach Park
Ocean Beach Park is a 5-stars sandy beach, located in a 5 km (3 miles) radius of Groton. There are lifeguards on the beach. There is parking. There are restrooms. There are cafés. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Waterford Beach Park
Waterford Beach Park is a 4-stars sandy beach, located in a 6 km (4 miles) radius of Groton. There are lifeguards on the beach. There is parking. There are restrooms. Waterford Beach Park 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.
Esker Point Beach
Esker Point Beach is a 3-stars sandy beach, located in a 7 km (4 miles) radius of Groton. There is parking. There are restrooms. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Noank Shipyard Inc
Noank Shipyard Inc is a 2-stars sandy beach, located in a 8 km (5 miles) radius of Groton. There is parking. There are restrooms.
Mystic River Beach
Mystic River Beach is a 1-stars sandy beach, located in a 10 km (6 miles) radius of Groton.
Groton Weather
FEBRUARY 23
32°F / 37°F
overcast clouds: 85-100%humidity: 76% | wind: 1 mph
FEBRUARY 24
36°F / 43°F
overcast clouds: 85-100%humidity: 86% | wind: 3 mph
FEBRUARY 25
34°F / 45°F
scattered clouds: 25-50%humidity: 80% | wind: 2 mph
FEBRUARY 26
36°F / 43°F
broken clouds: 51-84%humidity: 78% | wind: 2 mph
Sea Temperature in the Atlantic Ocean in Groton: General Trends and Swimming Opportunities
The coastal region of Connecticut, United States features a temperate maritime climate, characterized by relatively mild winters, warm humid summers, and regular rainfall spread throughout the year. Seasonal weather transitions can be noticeable, with cool autumns leading towards winter and spring serving as a moderate transition period towards summer.
Groton is located in North America in the Northern Hemisphere at a latitude of 41 degrees, along the shores of the Atlantic Ocean. Groton lies within the Connecticut in United States.
The average annual daytime air temperature in Groton is 61°F (16°C), with the average nighttime temperature being 43°F (6°C). The highest average daily temperature occurs in July, reaching 82°F (28°C), while the lowest is in January at 39°F (4°C). As for nighttime temperatures, the minimum average temperature of 24°F (-5°C) is recorded in January, and the maximum is in July, reaching 64°F (18°C).
According to historical data, Groton experiences 118 rainy days per year, which accounts for 32 percent of all days in the year. On average, there are 10 rainy days each month. The wettest month is December, with 11 rainy days and 4.4 inches (112 mm) of precipitation, while the driest month is October, which typically has 8 rainy days and only 3.9 inches (99 mm) of precipitation.
The average annual water temperature in Atlantic Ocean in Groton is 55°F (13°C). In January, the water reaches its lowest point of the year at 36°F (2°C), while in August, it peaks at 79°F (26°C). In Groton, the water temperature in the Atlantic Ocean never consistently reaches a comfortable level for swimming in any month.
Geographical Location of Groton
Nearby Cities
Frequently Asked Questions About Groton and its Water Temperatures
What is the current sea temperature in Groton?
The water temperature today in the Atlantic Ocean in Groton is 36°F (2°C).
In which months is the water temperature in Groton comfortable for swimming?
It cannot be guaranteed that the water temperature in Groton will be comfortable for swimming in any month of the year.
What is the water temperature in Groton during the winter?
The water temperature in the Atlantic Ocean in Groton during the winter ranges from 36°F to 54°F (2°C to 12°C).
What is the water temperature in Groton during the spring?
The water temperature in the Atlantic Ocean in Groton during the spring ranges from 36°F to 63°F (2°C to 17°C).
What is the water temperature in Groton during the summer?
The water temperature in the Atlantic Ocean in Groton during the summer ranges from 55°F to 79°F (13°C to 26°C).
What is the water temperature in Groton during the fall?
The water temperature in the Atlantic Ocean in Groton during the fall ranges from 48°F to 75°F (9°C to 24°C).
Is it possible to swim in the sea in Groton at any time of the year?
The Atlantic Ocean in Groton is quite cool, and swimming is only possible in June, July, August, and September when the water temperature reaches 70°F (21°C).
Is Groton a popular tourist destination for beach vacations?
Groton 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 Groton in the next month?
In March, the water temperature in the Atlantic Ocean in Groton will range between 36°F (2°C) and 45°F (7°C)