Dee Why Sea Temperature in March

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

Average water temperature in Dee Why for March

The average, high, and low temperatures below should help you if you can swim in the water in Dee Why in March.

23.71° C

(74.68° F)

highest: 26.3° C (79.34° F)
lowest: 20.66° C (69.19° F)

Water at this temperature is very pleasant to swim in and if you tend to wear a wetsuit when swimming, you might consider removing it now to avoid the body overheating.

Water temperature range by day in March in Dee Why

The chart below shows the range of low and high temperatures by day for the month of March in Dee Why.

Water temperatures for March in Dee Why in recent years

Day	2025	2024	2023	2022
1	0° C	25° C	23.68° C	25.08° C
2	0° C	25.06° C	23.87° C	24.99° C
3	0° C	24.85° C	24.33° C	24.74° C
4	0° C	24.95° C	24.68° C	24.86° C
5	0° C	24.82° C	24.93° C	24.91° C
6	0° C	24.75° C	24.71° C	24.96° C
7	0° C	25.04° C	24.34° C	25.08° C
8	0° C	24.92° C	24.13° C	24.95° C
9	0° C	24.97° C	23.89° C	24.74° C
10	0° C	24.82° C	23.69° C	24.79° C
11	0° C	24.57° C	23.77° C	24.77° C
12	0° C	24.41° C	23.68° C	24.72° C
13	0° C	24.38° C	23.58° C	24.74° C
14	0° C	24.5° C	23.7° C	24.88° C
15	0° C	24.63° C	23.88° C	24.88° C
16	0° C	24.55° C	24° C	24.83° C
17	0° C	24.34° C	23.87° C	24.75° C
18	0° C	24.03° C	23.79° C	24.67° C
19	0° C	23.66° C	23.91° C	24.64° C
20	0° C	23.58° C	23.96° C	24.53° C
21	0° C	22.86° C	23.9° C	24.35° C
22	0° C	22.42° C	23.7° C	24.3° C
23	0° C	22.49° C	23.56° C	24.17° C
24	0° C	22.25° C	23.43° C	23.88° C
25	0° C	22.24° C	23.36° C	23.65° C
26	0° C	22.25° C	23.2° C	23.54° C
27	0° C	22.3° C	23.16° C	23.43° C
28	0° C	22.26° C	23.16° C	23.23° C
29	0° C	22.27° C	22.91° C	23.25° C
30	0° C	22.25° C	22.79° C	23.26° C
31	0° C	22.43° C	22.67° C	23.21° C