World sea water temperatures

Water temperature in Niantic (CT) in May

Is it warm enough to swim in Niantic in May? Average water temperature in Niantic in May is 51.8°F and therefore is not suitable for comfortable swimming. The warmest sea in Niantic in May is 63°F, and the coldest is 45.5°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Niantic

Changes water temperature in Niantic in May 2025, 2024

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

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
May 148.4°F49.3°F45.5°F50.9°F
May 247.3°F49.1°F45.7°F50.4°F
May 349.8°F49.1°F46.6°F50.5°F
May 449.8°F49.8°F46.8°F50.9°F
May 549.6°F49.6°F46.8°F50.9°F
May 649.8°F49.8°F46.6°F51.8°F
May 750.9°F48.6°F46.2°F52°F
May 851.6°F50°F46.9°F51.8°F
May 954.1°F49.8°F47.8°F54.1°F
May 1052.2°F50.2°F47.7°F52.7°F
May 1152.2°F50.4°F48.4°F53.2°F
May 1252.5°F52.5°F48°F53.4°F
May 1350.5°F52°F48.4°F53.8°F
May 1450.9°F52.3°F48.4°F54.3°F
May 1552°F52.7°F49.6°F55°F
Day 2025 2024 Min Max
May 1652.2°F51.8°F50.2°F56.7°F
May 1753.1°F53.1°F50.2°F56.8°F
May 1854.7°F53.1°F50.2°F56.5°F
May 1954.5°F53.6°F48.9°F57°F
May 2053.8°F53.2°F50.5°F56.8°F
May 2154°F54.1°F50.5°F56.5°F
May 2254.3°F55.2°F50.4°F55.2°F
May 2352.7°F55.2°F51.6°F56.1°F
May 2453.1°F56.5°F51.4°F56.7°F
May 2553.8°F56.7°F51.4°F57.4°F
May 2654.1°F58.1°F51.4°F58.6°F
May 2753.6°F57.6°F52.3°F59.4°F
May 2854.3°F57.4°F52.2°F61°F
May 2954.7°F57°F52.5°F62.2°F
May 3054.7°F57.7°F53.2°F61.9°F
May 3155.9°F58.5°F54°F63°F
Niantic water temp chart in May

Average water temperature in Niantic in May over a decade

20162017201820192020
51.1°F51.4°F50°F51.4°F50.7°F
20212022202320242025
51.8°F51.8°F53.4°F53.1°F52.3°F

Niantic sea state in May

Chart comparing the height of waves in Niantic in May 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 Niantic in May

Niantic 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 May?

Want to know where the water temperature in May 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 May. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Rocky Neck51.8°F45.5°F63°F
Waterford51.6°F45.3°F62.8°F
Old Lyme52.2°F45.7°F63.1°F
Ocean Beach Park51.3°F45.1°F62.6°F
Noank51.4°F45°F62.6°F
Old Saybrook52.3°F45.5°F63.5°F
Saybrook Manor52.3°F45.5°F63.5°F
Plum Island52°F45.1°F63°F
Westbrook52.5°F45.3°F63.7°F
Orient Point52.5°F45.1°F63.3°F

Niantic photo gallery

  • Looking towards Fisher Island NY  Sunrise
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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 Niantic 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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