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Water temperature in Penobscot Bay (ME) in April

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Is it warm enough to swim in Penobscot Bay in April? Average water temperature in Penobscot Bay in April is 40.5°F and therefore is not suitable for comfortable swimming. The warmest sea in Penobscot Bay in April is 46.4°F, and the coldest is 34.3°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 April 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 April.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
April 136.9°F38.8°F34.3°F39.9°F
April 235.8°F39.2°F34.5°F40.1°F
April 336.3°F39.7°F34.9°F39.9°F
April 437.8°F39.2°F34.7°F39.9°F
April 537.6°F39°F34.7°F40.1°F
April 637.8°F39°F35.1°F40.3°F
April 738.3°F38.5°F34.7°F40.8°F
April 838.1°F38.8°F35.1°F41.7°F
April 938.1°F39.6°F35.1°F41.9°F
April 1037.9°F39.9°F35.4°F41.2°F
April 1137.6°F40.3°F35.8°F42.1°F
April 1238.3°F41.2°F36.5°F42.8°F
April 1338.3°F41.4°F36.9°F42.4°F
April 1438.8°F42.6°F37.8°F43.3°F
April 1538.8°F45°F37.4°F45°F
Day 2025 2024 Min Max
April 1638.8°F45.3°F37.6°F45.9°F
April 1739.6°F43.5°F37.8°F46.4°F
April 1839.6°F44.2°F37.9°F44.6°F
April 1938.8°F44.4°F38.1°F44.4°F
April 2040.5°F42.8°F37.9°F45°F
April 2140.8°F44.2°F38.5°F44.4°F
April 2240.8°F43.2°F39°F44.1°F
April 2341.7°F43.3°F39.2°F44.2°F
April 2441.2°F42.6°F39.4°F44.8°F
April 2543.2°F42.4°F39.9°F45°F
April 2642.8°F42.8°F39.9°F44.2°F
April 2742.6°F43.3°F39.7°F44.8°F
April 2843°F43.7°F40.5°F44.6°F
April 2942.4°F44.8°F40.3°F45.3°F
April 3043°F44.8°F40.1°F45.5°F
Penobscot Bay water temp chart in April

Average water temperature in Penobscot Bay in April over a decade

20162017201820192020
41.2°F40.3°F40.3°F38.8°F40.8°F
20212022202320242025
41.9°F41.5°F42.4°F41.9°F39.6°F

Penobscot Bay sea state in April

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

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 April?

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

AvrMinMax
Northport40.5°F34°F47.3°F
Searsport40.3°F34°F46.6°F
Castine40.3°F34°F46.2°F
Belfast40.5°F34°F46.6°F
Stockton Springs40.3°F34.2°F46.2°F
Union River Bay40.1°F35.1°F45.3°F
Marshall Island40.5°F36.1°F46°F
Ellsworth40.1°F35.1°F45°F
Surry40.1°F34.7°F45.9°F
Cushing40.8°F36°F46.6°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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