World sea water temperatures

Water temperature in Duluth (MN) in March

Is it warm enough to swim in Duluth in March? Average water temperature in Duluth in March is 33.4°F and therefore is not suitable for comfortable swimming. The warmest water in Duluth in March is 41.4°F, and the coldest is 31.1°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 March 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 March.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
March 133.3°F33.3°F31.6°F34.2°F
March 232.5°F33.6°F31.6°F34.3°F
March 332.7°F33.6°F31.6°F34.3°F
March 432.7°F34°F31.6°F34.7°F
March 532.7°F33.6°F31.6°F34.3°F
March 632.9°F33.8°F31.8°F34.3°F
March 732.9°F34°F32°F35.1°F
March 832.9°F33.8°F32°F34.3°F
March 933.3°F34.3°F32°F34.7°F
March 1032.7°F34°F32.4°F34.7°F
March 1133.1°F34.5°F32.4°F35.2°F
March 1233.1°F35.2°F32.4°F35.2°F
March 1333.1°F35.6°F32°F35.6°F
March 1433.3°F35.2°F31.8°F36.3°F
March 1533.3°F36°F31.8°F36°F
Day 2025 2024 Min Max
March 1633.4°F36.3°F31.3°F36.3°F
March 1733.6°F35.8°F31.5°F36.1°F
March 1833.6°F35.2°F31.6°F36.9°F
March 1933.6°F35.1°F31.8°F36.9°F
March 2033.3°F35.2°F32°F36.7°F
March 2133.3°F34.9°F31.6°F36.5°F
March 2233.4°F35.1°F31.3°F36.1°F
March 2333.4°F35.2°F31.1°F41.4°F
March 2432.9°F35.6°F31.3°F37.2°F
March 2533.3°F35.6°F31.6°F37.2°F
March 2633.8°F35.4°F31.8°F36.9°F
March 2734°F34.9°F32.5°F37.4°F
March 2834.3°F34.3°F32.5°F35.6°F
March 2934.3°F34.9°F32.4°F36.5°F
March 3034.2°F34.7°F32.4°F36.3°F
March 3134.2°F34.5°F32.5°F35.8°F
Duluth water temp chart in March

Average water temperature in Duluth in March over a decade

20162017201820192020
33.6°F34.5°F32.7°F32.9°F33.6°F
20212022202320242025
34°F32.7°F33.3°F34.7°F33.3°F

Duluth sea state in March

Chart comparing the height of waves in Duluth in March 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 March

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 March?

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

AvrMinMax
Park Point33.4°F31.1°F41.4°F
French River33.4°F30.9°F42.6°F
Knife River33.6°F30.9°F42.3°F
Two Harbors33.8°F30.9°F41.2°F
Port Wing33.6°F30.7°F40.5°F
Herbster33.4°F30.7°F39.6°F
Cornucopia33.4°F30.7°F39.2°F
Beaver Bay34°F30.7°F38.8°F
Ashland33.8°F31.6°F39.6°F
Silver Bay34°F30.7°F38.8°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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