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Water temperature in Penobscot Bay (ME) in August

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Is it warm enough to swim in Penobscot Bay in August? Average water temperature in Penobscot Bay in August is 60.4°F and therefore is not suitable for comfortable swimming. The warmest sea in Penobscot Bay in August is 66.7°F, and the coldest is 55.9°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Penobscot Bay

Changes water temperature in Penobscot Bay in August 2025, 2024

To get an accurate forecast for the water temperature in Penobscot 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 Penobscot Bay, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of August.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
August 158.3°F60.4°F57.4°F64°F
August 257.9°F60.1°F57.9°F64.4°F
August 359.4°F60.4°F57°F63.1°F
August 460.8°F61.7°F56.5°F63.3°F
August 559.5°F62.6°F56.7°F63.3°F
August 659.9°F60.8°F57.2°F64.8°F
August 760.1°F61.3°F56.7°F66.7°F
August 859.4°F60.3°F56.5°F64.8°F
August 960.4°F59°F55.9°F64.2°F
August 1059.5°F60.3°F56.7°F64.6°F
August 1160.3°F57.9°F57.2°F65.7°F
August 1260.8°F61.2°F58.1°F63.9°F
August 1359.9°F62.2°F57.7°F64°F
August 1460.1°F62.2°F57.6°F65.1°F
August 1558.8°F62.4°F58.1°F63.5°F
Day 2025 2024 Min Max
August 1659.9°F62.8°F56.7°F63.3°F
August 1760.4°F62.8°F57.6°F63.1°F
August 1858.5°F61.2°F57.2°F64.8°F
August 1957.4°F59.5°F56.8°F64°F
August 2057.7°F61.3°F56.8°F63°F
August 2157.2°F59.4°F57.2°F63.1°F
August 2257.9°F59°F57.4°F65.7°F
August 2358.8°F59.9°F57.6°F64.9°F
August 2459°F59.4°F57°F63.3°F
August 2558.5°F59°F57.9°F63.9°F
August 2658.1°F59.7°F57.6°F63.7°F
August 2759°F60.3°F57.9°F63.5°F
August 2858.8°F59.5°F57.9°F61.9°F
August 2959.5°F59.2°F57.4°F62.6°F
August 3060.6°F59.2°F58.3°F62.8°F
August 3159.9°F59.2°F57.6°F62.8°F
Penobscot Bay water temp chart in August

Average water temperature in Penobscot Bay in August over a decade

20162017201820192020
61.3°F59°F62.4°F59.5°F61.3°F
20212022202320242025
62.1°F62.6°F61.2°F60.4°F59.5°F

Penobscot Bay sea state in August

Chart comparing the height of waves in Penobscot Bay in August 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 Penobscot Bay in August

Penobscot 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 August?

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

AvrMinMax
Northport61.7°F55.9°F71.1°F
Searsport61.7°F55.9°F69.8°F
Castine61.7°F55.9°F70°F
Belfast62.2°F56.1°F70.5°F
Stockton Springs61.7°F55.9°F69.8°F
Union River Bay58.8°F53.6°F66.4°F
Marshall Island58.3°F54.5°F65.5°F
Ellsworth59.4°F53.8°F68.4°F
Surry60.6°F54.1°F72.5°F
Cushing61.2°F57.2°F67.3°F

Penobscot Bay photo gallery

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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 Penobscot 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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