Ketchikan Sea Temperature in September

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

Average water temperature in Ketchikan for September

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

Average

12.87° C

55.17° F

High

17.14° C

62.85° F

Low

10.72° C

51.3° F

Water temperature range by day in September in Ketchikan

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

Average daily water temperatures in Ketchikan for September

Day	Average	Low	High
1	13.93° C	12.52° C	16.33° C
2	13.81° C	12.52° C	17.14° C
3	13.82° C	12.54° C	16.74° C
4	13.92° C	12.86° C	17.06° C
5	13.88° C	12.95° C	16.32° C
6	13.75° C	12.7° C	16.55° C
7	13.51° C	12.17° C	16.24° C
8	13.43° C	11.67° C	15.92° C
9	13.57° C	11.96° C	15.84° C
10	13.52° C	11.27° C	15.15° C
11	13.47° C	11.01° C	15.03° C
12	13.33° C	11.18° C	15.05° C
13	13.12° C	11.5° C	15.26° C
14	13° C	11.58° C	14.52° C
15	12.92° C	11.6° C	14.28° C
16	12.83° C	11.42° C	14.4° C
17	12.61° C	11.27° C	14.43° C
18	12.49° C	10.72° C	14.44° C
19	12.42° C	11° C	14.34° C
20	12.36° C	11.42° C	14.11° C
21	12.25° C	11.3° C	13.82° C
22	12.15° C	11.17° C	13.76° C
23	12.14° C	11.13° C	13.93° C
24	12.03° C	11.15° C	13.98° C
25	12.01° C	11.05° C	13.64° C
26	12.09° C	11.02° C	14.23° C
27	12.01° C	10.73° C	14.19° C
28	11.93° C	10.96° C	13.52° C
29	11.74° C	10.87° C	12.78° C
30	11.59° C	10.88° C	12.45° C

Water temperature in September for locations near Ketchikan

Metlakatla

United States, North America

Data source and citation

Raw data for the calculations made to find the sea surface temperature in Ketchikan 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.