World sea water temperatures

Water temperature in Rocky Neck (CT) in January

Is it warm enough to swim in Rocky Neck in January? Average water temperature in Rocky Neck in January is 41.7°F and therefore is not suitable for comfortable swimming. The warmest sea in Rocky Neck in January is 48.9°F, and the coldest is 36.3°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Rocky Neck

Changes water temperature in Rocky Neck in January 2026, 2025

To get an accurate forecast for the water temperature in Rocky Neck for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Rocky Neck, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of January.

You can choose any other years:

Year 1:   Year 2:


Day 2026 2025 Min Max
January 140.8°F45.9°F40.8°F48.9°F
January 240.8°F44.1°F40.6°F48.6°F
January 340.5°F44.4°F40.5°F48.4°F
January 440.5°F44.4°F38.7°F47.7°F
January 539.7°F43.5°F39.7°F47.1°F
January 639.7°F43.2°F39.6°F46.8°F
January 7 43°F39.9°F46.6°F
January 8 42.6°F39.6°F46.4°F
January 9 41.5°F38.7°F46.6°F
January 10 41.5°F38.5°F46.8°F
January 11 41.9°F38.5°F46.4°F
January 12 41.2°F38.3°F46.4°F
January 13 41°F37.8°F46.4°F
January 14 41°F37.4°F45.5°F
January 15 40.6°F37°F45.1°F
Day 2026 2025 Min Max
January 16 40.5°F36.5°F44.8°F
January 17 40.1°F36.5°F44.6°F
January 18 39.9°F36.3°F44.4°F
January 19 39.7°F36.5°F43.7°F
January 20 39.2°F36.9°F43.9°F
January 21 39°F37°F44.2°F
January 22 39°F37.4°F43.5°F
January 23 38.3°F37.9°F43.3°F
January 24 37.9°F37.4°F43.3°F
January 25 37.9°F37.2°F43.2°F
January 26 37.8°F37°F43.7°F
January 27 38.7°F36.7°F43.9°F
January 28 38.7°F36.9°F43.5°F
January 29 39.4°F36.9°F43°F
January 30 38.7°F36.9°F43°F
January 31 38.5°F36.9°F42.6°F
Rocky Neck water temp chart in January

Average water temperature in Rocky Neck in January over a decade

20162017201820192020
44.6°F42.1°F38.3°F41.4°F42.3°F
20212022202320242025
43.2°F43.2°F42.8°F43.2°F40.8°F

Rocky Neck sea state in January

Chart comparing the height of waves in Rocky Neck in January over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Waves height in Rocky Neck in January

Rocky Neck water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Where is the warm sea water in January?

Want to know where the water temperature in January is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

Temperature in neighboring cities

The nearest locations with the average water temperature in January. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Plum Island41.7°F36.7°F48.7°F
Greenport41°F35.6°F48.2°F
Shelter Island Heights41°F35.6°F48.2°F
Mystic42.3°F37°F49.6°F
Southold41°F34.9°F48.4°F
Sag Harbor41.9°F35.2°F48.6°F
Peconic Bay41.9°F35.2°F48.6°F
Clinton40.6°F34.9°F48.6°F
Stonington42.6°F37.4°F49.6°F
Madison40.6°F34.9°F48.6°F

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Rocky Neck is equipped for disabled people

Current rating: 5,0 (2 votes cast)

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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Our report for Rocky Neck 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.

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