Nelson Bay Sea Temperature in September

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

Average water temperature in Nelson Bay for September

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

18.73° C

(65.71° F)

highest: 21.52° C (70.74° F)
lowest: 16.97° C (62.55° F)

At this temperature, water will feel cold compared to a swimming pool, but with a bit of experience and practice most people will find the water relatively comfortable to swim in.

Water temperature range by day in September in Nelson Bay

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

Water temperatures for September in Nelson Bay in recent years

Day	2024	2023	2022	2021
1	0° C	18.54° C	18.22° C	19° C
2	0° C	18.53° C	18.28° C	18.41° C
3	0° C	18.42° C	18.04° C	18.37° C
4	0° C	18.46° C	17.95° C	18.29° C
5	0° C	18.73° C	17.89° C	18.39° C
6	0° C	18.74° C	17.79° C	18.48° C
7	0° C	18.75° C	17.84° C	18.3° C
8	0° C	18.51° C	17.88° C	18.29° C
9	0° C	17.99° C	17.9° C	18.34° C
10	0° C	18.16° C	17.95° C	18.46° C
11	0° C	18.16° C	17.94° C	18.61° C
12	0° C	18.31° C	17.93° C	18.8° C
13	0° C	18.54° C	17.89° C	19.01° C
14	0° C	18.76° C	17.99° C	19.24° C
15	0° C	19.02° C	18.13° C	19.39° C
16	0° C	19.15° C	18.2° C	19.04° C
17	0° C	19.27° C	18.33° C	18.52° C
18	0° C	19.28° C	18.42° C	18.33° C
19	0° C	19.13° C	18.45° C	18.31° C
20	0° C	19.1° C	18.4° C	18.39° C
21	0° C	19.01° C	18.37° C	18.43° C
22	0° C	18.81° C	18.38° C	18.65° C
23	0° C	18.73° C	18.36° C	18.93° C
24	0° C	18.79° C	18.28° C	19° C
25	0° C	18.92° C	18.17° C	18.99° C
26	0° C	19.1° C	18.17° C	18.47° C
27	0° C	19.38° C	18.33° C	18.3° C
28	0° C	19.72° C	18.52° C	18.32° C
29	0° C	19.97° C	18.69° C	18.46° C
30	0° C	20.18° C	18.75° C	19.01° C