New London water temp

This data the coastal New London ocean water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current ocean temperature in New London

Water temperature in New London today is 68.5°F. Based on our historical data over a period of ten years, the warmest water in this day in New London was recorded in 2021 and was 70.9°F, and the coldest was recorded in 2024 at 64.6°F. Sea water temperature in New London is expected to drop to 65.7°F in the next 10 days. September average water temperature in New London is 68.4°F, the minimum temperature is 63.5°F, and the maximum is 73.8°F.

The swimming season in New London lasts from July to September. During those months, New London water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in New London in winter reaches 43°F, in spring 45.3°F, in summer the average temperature rises to 66.2°F, and in autumn it is 62.4°F.

New London water temperature now

The ocean salinity in New London is 28.51‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in New London for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for New London. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast New London. Data in table shown for September 25, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in New London

New London weather forecast

Current temperature and weather

Data in a table show New London temperature today (September 25, 2025). For more information and forecast for a few days, go to the weather forecast New London.

0-3 h	3-6 h	6-9 h	9-12 h
66.2°F	66.2°F	67.3°F	69.8°F

12-15 h	15-18 h	18-21 h	21-24 h
71.2°F	71.1°F	71.1°F	70.2°F

New London water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in New London. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in New London on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in New London

The nearest beaches and cities from New London with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Niantic	68.9°F	71.6°F		1' 6"
Noank	68.4°F	71.6°F		2' 0"
Ocean Beach Park	68.7°F	71.6°F		2' 0"
Waterford	69.1°F	71.6°F		1' 8"
Rocky Neck	69.1°F	71.6°F		1' 8"
Old Lyme	69.1°F	71.6°F		1' 5"
Fishers Island	68.4°F	71.6°F		2' 8"
Stonington	67.8°F	69.8°F		2' 5"
Plum Island	69.1°F	69.8°F		1' 9"
Old Saybrook	68.9°F	71.6°F		1' 4"

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Our report for New London is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.