The most detailed information about the water temperature in Groton in Atlantic Ocean (Connecticut, United States). Forecast of changes in water temperature for the next 10 days. Statistics by months for recent years. Information about the neighboring resorts. Weather forecast in Groton for a week.
Water temperature in Groton right now
data updated 28 minutes ago47°F
yesterday: 46°F
a week ago: 46°F
Trend: stability
Today water temperature in Groton is 47.8°F. In general, this water temperature is unacceptable for swimming. But hardened people can afford to be in such water for 5-10 minutes. In any case, the general weather is also important. So, the air temperature at the same time will reach 41°F.
Analysis and forecast
The water temperature today roughly corresponds to the average value on this day in recent years. Its value has rise both over the past 20 days and over the past week. Exactly a year ago, on this day, the water temperature in this location was 48°F. Water temperature range in Groton in April is from 37 to 53 degrees.
According to our forecast, in the next 5-6 days the water temperature in Groton will become lower than today, but in 10 days it will still slightly rise, its value will be 48°F.
Table of water temperature values in Groton
| Day | Fact* | Average** | Forecast*** |
| Apr 19 | 7.3°C | 7.5°C | |
| Apr 20 | 7.6°C | 8.0°C | |
| Apr 21 | 7.5°C | 8.5°C | |
| Apr 22 | 7.4°C | 8.3°C | |
| Apr 23 | 7.7°C | 8.0°C | |
| Apr 24 | 7.5°C | 9.0°C | |
| Apr 25 | 7.9°C | 8.8°C | |
| Apr 26 | 8.8°C | 9.3°C | |
| Apr 27 | 10.0°C | 9.5°C | |
| Apr 28 | 9.8°C | 9.3°C | |
| Apr 29 | 9.5°C | 9.0°C | |
| Apr 30 | 9.5°C | 9.0°C | |
| May 1 | 9.0°C | 8.5°C | |
| May 2 | 9.0°C | 8.5°C | |
| May 3 | 9.3°C | 8.8°C |
** Average - Average water temperature on this day in past years
*** Forecast - Our forecast for the water temperature
Actual nearshore temperatures may vary by several degrees from the indicated values. This is noticeable after heavy rain or after prolonged periods of strong winds. Some downstream winds cause cold, deep waters to replace surface waters that have been warmed by the sun.
To develop a forecast, we use our own mathematical model, which takes into account the current change in water temperature, historical data and the main weather trends, wind strength and direction, air temperature in each specific region. We also take into account data for other resorts in United States.
Annual graph of average water temperature change in Groton
Water temperature in Groton by month
Groton located in the northern hemisphere, at latitude 41 degrees. The comfortable water temperature for swimming is set here in June, almost always only at the end of the month. During a year in Groton there are 84 days of swimming. In general, the swimming season ends in September. Average annual water temperature on the coast in Groton is 55°F, by the seasons: in winter 43°F, in spring 46°F, in summer 69°F, in autumn 61°F. Minimum water temperature (37°F) in Groton it happens in February, maximum (76°F) in August.
You can find out detailed data on how the water temperature in Groton changes in each specific month:
Groton: general information and map
Neighboring cities and resorts
| City | Water* | Distance** |
| New London | 46°C | 2km |
| Waterford | 46°C | 7km |
| Noank | 47°C | 8km |
| Mystic | 47°C | 9km |
| Niantic | 46°C | 10km |
| Stonington | 47°C | 11km |
| East Lyme | 47°C | 12km |
| Old Saybrook | 47°C | 26km |
| Weekapaug | 47°C | 27km |
| Westbrook | 47°C | 32km |
| Montauk | 46°C | 36km |
| Greenport | 47°C | 36km |
** Straight line distance in kilometers
The warmest water today in United States recorded in Marathon, its value is 79°F. Lowest - in Nome, there water temperature now 28°F. Average water temperature in the country today - 57°F.
Water temperature data in Groton and neighboring towns and resorts collected from various sources, using buoys, using satellite maps of sea, river and lake surfaces of the NOAA agency.
We use data from various local authorities in each specific location of the world to more accurately reflect temperature values.
The nearest airport is located in a 3 kilometers. This is Groton New London (GON) airport. We have no information as to whether it is valid and what flights it receives or sends.
Groton: weather forecast
The weather forecast is shown in local time in Groton
6km/hhumidity: 74%, clouds: 0%
9km/hhumidity: 62%, clouds: 0%
14km/hhumidity: 60%, clouds: 0%
15km/hhumidity: 62%, clouds: 15%
16km/hhumidity: 72%, clouds: 10%
12km/hhumidity: 72%, clouds: 0%
13km/hhumidity: 71%, clouds: 0%
8km/hhumidity: 73%, clouds: 5%
10km/hhumidity: 66%, clouds: 5%
10km/hhumidity: 54%, clouds: 100%
15km/hhumidity: 54%, clouds: 100%
19km/hhumidity: 53%, clouds: 100%
17km/hhumidity: 66%, clouds: 100%
14km/hhumidity: 76%, clouds: 100%
14km/hhumidity: 92%, clouds: 100%
16km/hhumidity: 95%, clouds: 100%
16km/hhumidity: 96%, clouds: 100%
15km/hhumidity: 96%, clouds: 100%
10km/hhumidity: 91%, clouds: 100%
7km/hhumidity: 87%, clouds: 96%
9km/hhumidity: 92%, clouds: 98%
9km/hhumidity: 95%, clouds: 65%
11km/hhumidity: 95%, clouds: 71%
11km/hhumidity: 95%, clouds: 89%
14km/hhumidity: 89%, clouds: 92%
14km/hhumidity: 71%, clouds: 95%
14km/hhumidity: 72%, clouds: 95%
13km/hhumidity: 85%, clouds: 100%
14km/hhumidity: 89%, clouds: 99%
14km/hhumidity: 90%, clouds: 100%
14km/hhumidity: 92%, clouds: 100%
16km/hhumidity: 92%, clouds: 100%
14km/hhumidity: 87%, clouds: 100%
16km/hhumidity: 78%, clouds: 100%
16km/hhumidity: 77%, clouds: 99%
10km/hhumidity: 80%, clouds: 100%
14km/hhumidity: 85%, clouds: 100%
