S
M
T
W
T
F
S
26
55°
36°
27
65°
37°
28
63°
35°
29
58°
39°
30
56°
46°
1
60°
39°
2
58°
47°
3
58°
42°
4
62°
48°
5
63°
53°
6
61°
56°
7
63°
43°
8
61°
40°
9
62°
51°
10
68°
51°
11
60°
43°
12
63°
44°
13
64°
51°
14
67°
53°
15
68°
49°
16
72°
46°
17
84°
56°
18
82°
57°
19
79°
63°
20
88°
65°
21
69°
53°
22
64°
51°
23
56°
49°
24
56°
49°
25
70°
55°
26
77°
57°
27
78°
61°
28
76°
55°
29
75°
55°
30
55°
43°
31
72°
56°
1
69°
46°
2
71°
50°
3
74°
53°
4
77°
58°
5
82°
64°
6
82°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mastic Beach
Mastic Beach's May 2026 forecast shows daily high temperatures ranging from 55° to 82°, with overnight lows between 43° and 64°. The average high for May is 73° with an average low of 54°. 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 Mastic Beach. See also: June | July | August.
