World sea water temperatures

Water temperature in Duluth (MN) in April

Is it warm enough to swim in Duluth in April? Average water temperature in Duluth in April is 36.1°F and therefore is not suitable for comfortable swimming. The warmest water in Duluth in April is 43.9°F, and the coldest is 31.6°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Duluth

Changes water temperature in Duluth in April 2025, 2024

To get an accurate forecast for the water temperature in Duluth for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Duluth, 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 134°F34.9°F32°F36°F
April 234°F34.9°F32°F36.7°F
April 334.2°F35.4°F32°F37.4°F
April 434.2°F34.9°F32.7°F36.9°F
April 534.9°F37.9°F33.1°F37.9°F
April 634.9°F38.7°F31.6°F38.7°F
April 734.7°F38.3°F31.8°F39.9°F
April 834.7°F37.9°F32°F40.5°F
April 934.7°F37.8°F32°F38.8°F
April 1034.5°F38.5°F32.2°F38.5°F
April 1135.1°F40.5°F32.2°F40.5°F
April 1235.1°F40.3°F32.4°F40.3°F
April 1335.1°F42.3°F31.8°F42.3°F
April 1435.6°F42.6°F32.7°F42.6°F
April 1535.8°F43.2°F32.4°F43.2°F
Day 2025 2024 Min Max
April 1635.2°F43.9°F32.7°F43.9°F
April 1734.5°F43.5°F32.7°F43.5°F
April 1834.3°F43.2°F32.7°F43.2°F
April 1937.6°F43.2°F33.1°F43.2°F
April 2036.3°F41.4°F33.3°F41.4°F
April 2138.3°F41.9°F33.4°F41.9°F
April 2238.5°F41.4°F33.4°F42.1°F
April 2340.8°F41°F34°F43.3°F
April 2439.2°F39.7°F34.2°F42.8°F
April 2541.2°F40.3°F34.2°F41.2°F
April 2637.8°F40.8°F34.3°F41.4°F
April 2738.1°F39.6°F34.3°F42.4°F
April 2838.1°F39.2°F33.8°F42.4°F
April 2941.2°F38.8°F34.5°F43°F
April 3039.9°F41.7°F34.3°F43°F
Duluth water temp chart in April

Average water temperature in Duluth in April over a decade

20162017201820192020
35.6°F36.9°F34°F35.1°F38.5°F
20212022202320242025
39.7°F33.6°F34.7°F39.9°F36.3°F

Duluth sea state in April

Chart comparing the height of waves in Duluth 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 Duluth in April

Duluth 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
Park Point36.1°F31.6°F43.9°F
French River35.1°F31.3°F39.4°F
Knife River34.9°F31.3°F39.2°F
Two Harbors34.9°F31.3°F39°F
Port Wing35.1°F31.5°F40.8°F
Herbster35.1°F31.3°F39.7°F
Cornucopia35.2°F31.3°F40.3°F
Beaver Bay34.9°F31.1°F39.2°F
Ashland36.5°F32.4°F45.7°F
Silver Bay34.9°F31.3°F39.2°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 Duluth 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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