S
M
T
W
T
F
S
26
41°
33°
27
38°
27°
28
38°
26°
29
40°
29°
30
56°
28°
1
56°
36°
2
63°
43°
3
54°
41°
4
48°
38°
5
43°
38°
6
49°
40°
7
62°
40°
8
57°
39°
9
47°
36°
10
45°
35°
11
52°
38°
12
56°
38°
13
45°
37°
14
45°
38°
15
51°
39°
16
48°
38°
17
46°
38°
18
53°
38°
19
48°
39°
20
52°
41°
21
47°
39°
22
46°
38°
23
51°
38°
24
50°
35°
25
50°
37°
26
48°
38°
27
56°
36°
28
49°
37°
29
45°
37°
30
42°
34°
31
46°
34°
1
42°
30°
2
49°
37°
3
60°
41°
4
68°
44°
5
56°
44°
6
59°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Southern Harbour
Southern Harbour's May 2026 forecast shows daily high temperatures ranging from 42° to 68°, with overnight lows between 30° and 44°. The average high for May is 53° with an average low of 38°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Southern Harbour. See also: June | July | August.
