World sea water temperatures

Water temperature in Long Neck (DE) in March

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Is it warm enough to swim in Long Neck in March? Average water temperature in Long Neck in March is 43.5°F and therefore is not suitable for comfortable swimming. The warmest sea in Long Neck in March is 53.1°F, and the coldest is 32.7°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Long Neck

Changes water temperature in Long Neck in March 2025, 2024

To get an accurate forecast for the water temperature in Long 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 Long Neck, 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 143.2°F43.9°F33.3°F46.6°F
March 241.5°F45.3°F32.7°F46.2°F
March 340.1°F46.4°F33.1°F46.4°F
March 440.8°F44.6°F33.8°F49.3°F
March 540.5°F44.8°F33.8°F47.3°F
March 643.2°F44.8°F32.9°F47.8°F
March 743°F45.3°F33.3°F47.8°F
March 843.3°F45.9°F33.8°F46.4°F
March 944.8°F45.5°F34.5°F47.7°F
March 1043.9°F47.7°F35.1°F47.7°F
March 1146.2°F45.1°F36.1°F46.9°F
March 1245.7°F45.5°F36°F46.9°F
March 1343.7°F46.9°F36.1°F48.6°F
March 1444.1°F47.8°F36.9°F49.1°F
March 1547.3°F47.1°F36.7°F50.2°F
Day 2025 2024 Min Max
March 1645.3°F48.7°F36.9°F48.7°F
March 1745.3°F50.2°F38.1°F50.2°F
March 1847.7°F51.6°F37.9°F51.6°F
March 1945.7°F49.3°F38.7°F50.9°F
March 2045.7°F49.5°F38.5°F50.7°F
March 2150.4°F48.6°F39.2°F51.4°F
March 2252.2°F46.9°F39.2°F52.9°F
March 2348.4°F47.1°F39.6°F53.1°F
March 2447.5°F47.3°F39.7°F52.9°F
March 2547.8°F46.6°F40.1°F52.5°F
March 2648.7°F46.6°F38.7°F50.7°F
March 2749.5°F46.8°F39°F50.4°F
March 2848.4°F46.8°F39.4°F50°F
March 2950.5°F47.7°F40.1°F50.9°F
March 3050.2°F47.1°F40.3°F50.4°F
March 3149.1°F48.6°F40.8°F50°F
Long Neck water temp chart in March

Average water temperature in Long Neck in March over a decade

20162017201820192020
45.1°F43.7°F41.5°F42.8°F47.5°F
20212022202320242025
44.6°F45.9°F46.6°F46.9°F45.9°F

Long Neck sea state in March

Chart comparing the height of waves in Long Neck 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 Long Neck in March

Long 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 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
Rehoboth Bay43.2°F32.7°F52.9°F
Rehoboth Beach43.2°F32.5°F52.9°F
Dewey beach43.2°F32.5°F52.9°F
Indian River Inlet43.2°F32.9°F53.1°F
Towers Beach43°F32.7°F52.9°F
Bethany Beach43.3°F33.1°F53.1°F
Cape Henlopen43°F32.4°F52.9°F
Broadkill Beach43.2°F32°F52.9°F
Fenwick Island43.3°F33.8°F53.2°F
Slaughter Beach43.2°F31.6°F53.1°F

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  • rural Delaware Bay, middle section, Nantuxent Cove, picture taken at Money Island NJ
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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 Long 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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