World sea water temperatures

Water temperature in Portsmouth (NH) in June

Is it warm enough to swim in Portsmouth in June? Average water temperature in Portsmouth in June is 57.9°F and therefore is not suitable for comfortable swimming. The warmest sea in Portsmouth in June is 66.4°F, and the coldest is 49.3°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Portsmouth

Changes water temperature in Portsmouth in June 2025, 2024

To get an accurate forecast for the water temperature in Portsmouth for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Portsmouth, 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 150.2°F55.4°F50.2°F60.8°F
June 249.3°F55.8°F49.3°F59.2°F
June 350.7°F56.5°F49.8°F58.8°F
June 452.9°F58.3°F50.7°F59°F
June 555.6°F59.4°F50.9°F60.6°F
June 655.8°F59°F51.4°F61°F
June 756.3°F59.5°F51.3°F59.5°F
June 855.8°F60.3°F51.6°F60.3°F
June 955.2°F59°F52.3°F59.2°F
June 1054.5°F59.5°F53.4°F59.5°F
June 1156.3°F58.8°F53.4°F59.4°F
June 1258.1°F60.4°F54.1°F60.4°F
June 1358.5°F61°F54.3°F61°F
June 1458.6°F60.3°F53.6°F60.3°F
June 1559.5°F61.3°F54.1°F61.3°F
Day 2025 2024 Min Max
June 1659.5°F59.2°F55.4°F60.1°F
June 1759.4°F60.1°F55.6°F60.6°F
June 1860.8°F60.3°F55°F60.8°F
June 1962.1°F60.8°F56.1°F62.4°F
June 2060.4°F63.7°F56.3°F63.7°F
June 2156.8°F62.4°F56.8°F65.1°F
June 22 61.2°F56.7°F65.8°F
June 2356.8°F60.8°F55.9°F66.2°F
June 2458.8°F60.8°F55.8°F66.4°F
June 2559.5°F61°F56.7°F65.8°F
June 2661.3°F61.7°F58.1°F65.3°F
June 2761°F61.5°F57.4°F64.6°F
June 2859.9°F59.9°F57.6°F66°F
June 2961.5°F57.6°F57.6°F65.5°F
June 3062.4°F57°F57°F64.4°F
Portsmouth water temp chart in June

Average water temperature in Portsmouth in June over a decade

20162017201820192020
58.5°F55.9°F57.6°F55.9°F58.8°F
20212022202320242025
57.6°F58.3°F58.8°F59.7°F57.6°F

Portsmouth sea state in June

Chart comparing the height of waves in Portsmouth 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 Portsmouth in June

Portsmouth 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
Wallis Sands Beach57.9°F49.6°F66.4°F
New Castle57.7°F48.9°F66.4°F
Jenness Beach58.1°F49.6°F66.6°F
Long Sands Beach57.7°F48.4°F66.4°F
North Beach58.3°F49.8°F66.6°F
Short Sands Beach57.6°F48°F66.4°F
Hampton58.5°F49.8°F66.6°F
Ogunquit57.6°F47.7°F66.4°F
Salisbury58.6°F49.8°F66.7°F
Wells57.6°F47.1°F66.4°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 Portsmouth 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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