S
M
T
W
T
F
S
26
59°
45°
27
58°
43°
28
57°
43°
29
62°
40°
30
66°
45°
1
65°
43°
2
57°
51°
3
54°
48°
4
54°
46°
5
53°
43°
6
53°
39°
7
56°
44°
8
54°
44°
9
53°
39°
10
54°
36°
11
52°
43°
12
55°
44°
13
54°
43°
14
54°
41°
15
53°
39°
16
52°
38°
17
54°
44°
18
57°
45°
19
61°
49°
20
59°
51°
21
64°
53°
22
64°
56°
23
63°
52°
24
71°
56°
25
69°
52°
26
59°
47°
27
69°
56°
28
70°
55°
29
63°
52°
30
65°
52°
31
62°
53°
1
63°
52°
2
60°
49°
3
58°
48°
4
57°
47°
5
57°
48°
6
59°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Portrush
Portrush's May 2026 forecast shows daily high temperatures ranging from 57° to 70°, with overnight lows between 47° and 56°. The average high for May is 62° with an average low of 51°. 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 Portrush. See also: June | July | August.
