World sea water temperatures

Water temperature in Union River Bay (ME) in May

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Is it warm enough to swim in Union River Bay in May? Average water temperature in Union River Bay in May is 45.9°F and therefore is not suitable for comfortable swimming. The warmest sea in Union River Bay in May is 52.5°F, and the coldest is 39.6°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Union River Bay

Changes water temperature in Union River Bay in May 2025, 2024

To get an accurate forecast for the water temperature in Union River Bay for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Union River Bay, 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 141.9°F45°F39.6°F45.5°F
May 242.4°F44.1°F40.5°F44.6°F
May 344.1°F44.2°F41°F44.8°F
May 443.3°F44.2°F40.1°F45.9°F
May 542.8°F45°F41.9°F46°F
May 642.8°F44.6°F42.1°F45.1°F
May 743.3°F44.8°F42.1°F46.4°F
May 844.8°F45.1°F41.7°F46.8°F
May 943.9°F44.8°F41.9°F46.4°F
May 1045.3°F45.1°F43°F46.9°F
May 1145.1°F45°F42.8°F48°F
May 1245.1°F45.3°F42.1°F47.8°F
May 1345.5°F46.9°F43.2°F47.7°F
May 1446.2°F47.1°F43.3°F49.1°F
May 1545.1°F45.7°F43.5°F47.8°F
Day 2025 2024 Min Max
May 1645.1°F45°F43.2°F47.8°F
May 1748°F47.7°F42.8°F49.1°F
May 1847.7°F48.2°F42.6°F48.9°F
May 1947.7°F48.7°F42.4°F49.5°F
May 2047.7°F48.9°F42.8°F50.4°F
May 2147.1°F48.4°F42.8°F50.4°F
May 2246.9°F50.2°F43.7°F51.4°F
May 2346.8°F52.5°F44.2°F52.5°F
May 2446.8°F51.6°F44.2°F51.6°F
May 2546.4°F50.7°F45°F51.3°F
May 2647.3°F50.4°F45.7°F51.3°F
May 2747.3°F51.4°F45.9°F51.4°F
May 2847.1°F51.1°F45.3°F52°F
May 2946.9°F51.6°F45.3°F51.6°F
May 3048°F50.7°F45.9°F51.3°F
May 3146.8°F51.1°F46.2°F52°F
Union River Bay water temp chart in May

Average water temperature in Union River Bay in May over a decade

20162017201820192020
46.9°F44.6°F46.6°F44.6°F45.9°F
20212022202320242025
47.8°F47.3°F47.5°F47.5°F45.7°F

Union River Bay sea state in May

Chart comparing the height of waves in Union River Bay 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 Union River Bay in May

Union River Bay 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
Marshall Island45.3°F39.6°F52°F
Bar Harbor45.5°F38.8°F52.9°F
Hancock46°F39.2°F54.5°F
Castine47.5°F40.3°F56.8°F
Franklin45.9°F39.2°F54.5°F
Sullivan45.9°F39.2°F54.5°F
Stockton Springs47.7°F40.1°F56.8°F
Bayside47.7°F40.3°F57.4°F
Vinalhaven46.2°F39.9°F54°F
Bucksport47.7°F40.1°F56.7°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 Union River Bay 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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