S
M
T
W
T
F
S
26
56°
40°
27
65°
41°
28
63°
43°
29
60°
47°
30
60°
47°
1
62°
44°
2
61°
50°
3
59°
44°
4
65°
48°
5
67°
52°
6
60°
56°
7
64°
46°
8
64°
46°
9
61°
49°
10
67°
51°
11
60°
47°
12
64°
46°
13
67°
51°
14
65°
54°
15
67°
48°
16
72°
47°
17
83°
58°
18
82°
60°
19
81°
61°
20
92°
66°
21
67°
56°
22
66°
54°
23
56°
50°
24
56°
55°
25
69°
59°
26
75°
59°
27
78°
64°
28
76°
56°
29
74°
56°
30
73°
52°
31
67°
56°
1
72°
59°
2
70°
58°
3
74°
59°
4
74°
59°
5
75°
60°
6
77°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Copiague Harbor
Copiague Harbor's May 2026 forecast shows daily high temperatures ranging from 56° to 78°, with overnight lows between 52° and 64°. The average high for May is 72° with an average low of 58°. 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 Copiague Harbor. See also: June | July | August.
