Duluth Sea Temperature in August

Looking to find out what the average sea water temperature in Duluth is for August? Find out what the lowest, highest, and average water temperatures are for Duluth over the past 10 years.

Average water temperature in Duluth for August

The average, high, and low temperatures below should help you if you can swim in the water in Duluth in August.

Average

18.26° C

64.86° F

High

21.94° C

71.49° F

Low

12.23° C

54.01° F

Water temperature range by day in August in Duluth

The chart below shows the range of low and high temperatures by day for the month of August in Duluth.

Average daily water temperatures in Duluth for August

Day	Average	Low	High
1	18.63° C	13.41° C	21.25° C
2	18.49° C	13.39° C	21.2° C
3	18.64° C	12.82° C	21.11° C
4	18.61° C	13.22° C	20.74° C
5	18.31° C	13.24° C	20.77° C
6	18.52° C	13.52° C	21.34° C
7	18.74° C	13.99° C	21.2° C
8	18.74° C	13.71° C	20.94° C
9	18.82° C	13.78° C	21.31° C
10	18.64° C	14.32° C	20.72° C
11	18.37° C	14.47° C	20.84° C
12	18.38° C	14.24° C	20.82° C
13	18.56° C	14.57° C	20.9° C
14	18.7° C	14.6° C	20.93° C
15	18.69° C	14.4° C	20.93° C
16	18.69° C	14.61° C	21.08° C
17	18.43° C	15.25° C	21.49° C
18	18.28° C	15.54° C	21.94° C
19	18.35° C	15.94° C	21.92° C
20	18.24° C	15.87° C	21.72° C
21	18.19° C	16.47° C	21.28° C
22	18.16° C	15.77° C	20.08° C
23	17.89° C	16.81° C	19.9° C
24	17.9° C	16.81° C	19.85° C
25	17.85° C	16.98° C	18.93° C
26	17.73° C	17.04° C	18.82° C
27	17.54° C	16.9° C	18.83° C
28	17.6° C	16.48° C	18.43° C
29	17.47° C	16.18° C	19.17° C
30	17.51° C	15.44° C	19.47° C
31	17.28° C	12.23° C	19.43° C

Water temperature in August for locations near Duluth

Two Harbors

United States, North America

Data source and citation

Raw data for the calculations made to find the sea surface temperature in Duluth comes from the National Oceanic and Atmospheric Administration (NOAA) and their 1/4° daily Optimum Interpolation Sea Surface Temperature.

The water temperature data is constructed by combining observations from different platforms (satellites, ships, buoys, and Argo floats) on a regular global grid. A spatially complete sea surface temperature map is then built by interpolating to fill in gaps in the data.

If you'd like to use any of the information above in the format it is presented, please use the citation tool below.