World sea water temperatures

Water temperature in Old Lyme (CT) in March

Is it warm enough to swim in Old Lyme in March? Average water temperature in Old Lyme in March is 39.4°F and therefore is not suitable for comfortable swimming. The warmest sea in Old Lyme in March is 50°F, and the coldest is 32.5°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Old Lyme

Changes water temperature in Old Lyme in March 2025, 2024

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

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
March 136.5°F40.6°F32.7°F41.4°F
March 237°F40.3°F32.5°F41.4°F
March 337°F41.5°F32.7°F42.3°F
March 437°F40.5°F32.9°F42.4°F
March 537.6°F40.1°F32.9°F41.5°F
March 637.8°F40.1°F33.4°F41.5°F
March 737.9°F39.9°F32.7°F41.9°F
March 837.8°F41.2°F33.1°F42.6°F
March 937.6°F40.8°F33.3°F43°F
March 1037.9°F42.3°F33.6°F42.3°F
March 1138.1°F41.4°F34°F42.6°F
March 1238.1°F41.7°F33.8°F43°F
March 1339.4°F41.4°F34°F43.5°F
March 1439.9°F41.5°F34.3°F44.1°F
March 1542.4°F41.5°F34°F43.9°F
Day 2025 2024 Min Max
March 1641°F42.8°F34.2°F43.7°F
March 1740.8°F44.4°F34.2°F44.4°F
March 1838.8°F43.2°F34.3°F44.8°F
March 1939.9°F43.2°F34.5°F45.1°F
March 2040.1°F43.5°F34.9°F45.5°F
March 2140.6°F43.2°F35.1°F45.9°F
March 2240.6°F42.4°F34.5°F47.5°F
March 2340.8°F42.4°F34.5°F50°F
March 2440.8°F42.6°F34.7°F48°F
March 2541.9°F42.6°F35.2°F47.8°F
March 2641.4°F42.8°F36.1°F47.1°F
March 2741°F43.7°F36.3°F46.8°F
March 2841°F43.5°F36.5°F46.2°F
March 2941.2°F42.3°F36.1°F46.2°F
March 3041.2°F42.8°F36.3°F46.8°F
March 3141.2°F44.4°F36.5°F46.2°F
Old Lyme water temp chart in March

Average water temperature in Old Lyme in March over a decade

20162017201820192020
41.2°F39.2°F39°F38.8°F42.3°F
20212022202320242025
39.4°F40.5°F41.7°F42.1°F39.6°F

Old Lyme sea state in March

Chart comparing the height of waves in Old Lyme in March 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 Old Lyme in March

Old Lyme 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 March?

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

AvrMinMax
Rocky Neck39.6°F32.7°F50.7°F
Plum Island39.7°F32.7°F50.4°F
Hammonasset Beach38.8°F32.4°F49.3°F
Orient Point39.9°F32.9°F50.2°F
Southold39.7°F32.9°F49.6°F
Gardiners Bay40.1°F33.1°F50.2°F
Noank39.9°F32.9°F50.9°F
Sag Harbor40.1°F33.3°F49.8°F
Peconic Bay40.1°F33.3°F49.8°F
Noyack39.9°F33.1°F49.8°F

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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 Old Lyme 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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