Dee Why Sea Temperature in May

Looking to find out what the average sea water temperature in Dee Why is for May? 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 May

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

21.35° C

(70.44° F)

highest: 23.79° C (74.82° F)
lowest: 18.28° C (64.9° 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 May in Dee Why

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

Water temperatures for May in Dee Why in recent years

Day	2024	2023	2022	2021
1	0° C	23° C	23.06° C	20.95° C
2	0° C	22.86° C	22.85° C	20.9° C
3	0° C	22.61° C	22.79° C	20.93° C
4	0° C	22.41° C	23° C	20.96° C
5	0° C	22.25° C	23.19° C	20.99° C
6	0° C	22.06° C	23.13° C	20.79° C
7	0° C	21.87° C	23.08° C	20.7° C
8	0° C	21.59° C	23.09° C	20.71° C
9	0° C	21.31° C	23.03° C	20.47° C
10	0° C	21.02° C	23.38° C	20.3° C
11	0° C	20.68° C	23.51° C	20.32° C
12	0° C	20.59° C	23.06° C	20.7° C
13	0° C	20.72° C	22.72° C	20.52° C
14	0° C	20.8° C	22.37° C	20.5° C
15	0° C	20.7° C	22.11° C	20.59° C
16	0° C	20.74° C	21.98° C	20.68° C
17	0° C	20.8° C	22.05° C	20.72° C
18	0° C	20.66° C	22.28° C	20.53° C
19	0° C	20.59° C	22.52° C	20.24° C
20	0° C	20.44° C	22.83° C	20.31° C
21	0° C	20.25° C	22.97° C	20.21° C
22	0° C	20.11° C	22.72° C	20.28° C
23	0° C	20.1° C	22.61° C	20.4° C
24	0° C	20.19° C	22.62° C	20.44° C
25	0° C	20.14° C	22.58° C	20.3° C
26	0° C	19.84° C	22.33° C	20.24° C
27	0° C	19.85° C	22.37° C	20.26° C
28	0° C	19.74° C	22.21° C	20.5° C
29	0° C	19.63° C	21.83° C	20.44° C
30	0° C	19.6° C	21.52° C	20.39° C
31	0° C	19.56° C	21.31° C	20.3° C