S
M
T
W
T
F
S
26
66°
57°
27
68°
56°
28
68°
56°
29
66°
55°
30
68°
56°
31
67°
56°
1
63°
55°
2
64°
56°
3
66°
56°
4
65°
57°
5
66°
57°
6
66°
55°
7
65°
54°
8
64°
53°
9
64°
53°
10
65°
54°
11
64°
55°
12
64°
53°
13
65°
54°
14
64°
54°
15
64°
52°
16
65°
54°
17
63°
52°
18
65°
51°
19
63°
53°
20
64°
49°
21
65°
53°
22
64°
54°
23
64°
51°
24
65°
51°
25
64°
48°
26
65°
51°
27
66°
52°
28
67°
54°
29
67°
54°
30
66°
53°
31
66°
54°
1
65°
54°
2
66°
55°
3
66°
53°
4
65°
54°
5
65°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Portrush
Portrush's August 2026 forecast shows daily high temperatures ranging from 63° to 68°, with overnight lows between 48° and 57°. The average high for August is 65° 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 August weather will actually feel in Portrush. See also: September | October | November.
