World sea water temperatures

Water temperature in New Castle (DE) in June

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Is it warm enough to swim in New Castle in June? Average water temperature in New Castle in June is 72°F and therefore suitable for comfortable swimming. The warmest sea in New Castle in June is 80.6°F, and the coldest is 63.3°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in New Castle

Changes water temperature in New Castle in June 2025, 2024

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

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
June 164.2°F70.5°F63.7°F72.9°F
June 263.9°F71.4°F63.9°F72.5°F
June 364.4°F73°F64.4°F73.6°F
June 467.3°F72°F65.7°F73.4°F
June 563.3°F72.1°F63.3°F74.7°F
June 667.3°F74.8°F65.7°F74.8°F
June 767.6°F73.9°F66°F73.9°F
June 867.3°F74.8°F67.1°F74.8°F
June 967.1°F74.1°F67.1°F75.2°F
June 1067.6°F74.1°F67.6°F74.8°F
June 1169.6°F73.6°F68°F73.9°F
June 1270.9°F74.7°F68.4°F74.7°F
June 1370.3°F74.1°F68.2°F74.8°F
June 1470.2°F75.6°F67.6°F76.6°F
June 1570°F75.7°F67.3°F75.7°F
Day 2025 2024 Min Max
June 1669.6°F75.9°F66.6°F75.9°F
June 1769.4°F76.8°F66.7°F77°F
June 1871.2°F77°F67.8°F77°F
June 1973°F77°F68.2°F77°F
June 2072.9°F77.9°F69.1°F77.9°F
June 2172.7°F78.8°F68.9°F78.8°F
June 22 80.4°F69.4°F80.4°F
June 2376.1°F80.2°F70.2°F80.2°F
June 2478.8°F80.6°F70.5°F80.6°F
June 2578.6°F79.7°F71.1°F79.7°F
June 2679°F77.9°F71.4°F79°F
June 2778.6°F79.9°F73°F79.9°F
June 2876.8°F79.7°F72.5°F79.7°F
June 2978.4°F78.6°F72.9°F79.2°F
June 3078.6°F76.6°F73°F79.7°F
New Castle water temp chart in June

Average water temperature in New Castle in June over a decade

20162017201820192020
71.8°F71.1°F72.7°F73.4°F73.4°F
20212022202320242025
73.2°F74.3°F70.7°F76.1°F71.2°F

New Castle sea state in June

Chart comparing the height of waves in New Castle in June 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 New Castle in June

New Castle 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 June?

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

AvrMinMax
Delaware City72.3°F63.5°F81.3°F
Carneys Point Township71.4°F63°F80.1°F
Penns Grove71.2°F62.6°F80.2°F
Charlestown72.9°F63.9°F83.1°F
Sandy Cove72.9°F63.9°F83.1°F
North East73°F63.9°F84.2°F
Sea Breeze72.5°F64.2°F81.3°F
White Crystal Beach73°F63.9°F83.8°F
Wilmington72.5°F64.2°F80.8°F
Havre De Grace73°F63.9°F84.4°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 New Castle 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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