S
M
T
W
T
F
S
31
62°
52°
1
65°
54°
2
64°
54°
3
61°
52°
4
58°
51°
5
58°
49°
6
61°
51°
7
62°
52°
8
N/A
9
57°
46°
10
58°
49°
11
60°
52°
12
62°
52°
13
64°
54°
14
64°
54°
15
66°
54°
16
65°
52°
17
64°
53°
18
62°
50°
19
63°
51°
20
64°
52°
21
59°
48°
22
59°
49°
23
60°
52°
24
60°
51°
25
61°
49°
26
60°
49°
27
60°
50°
28
61°
52°
29
65°
53°
30
61°
53°
1
62°
52°
2
62°
51°
3
61°
52°
4
62°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
June Weather in Portstewart
Portstewart's June 2026 forecast shows daily high temperatures ranging from 57° to 66°, with overnight lows between 46° and 54°. The average high for June 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 June weather will actually feel in Portstewart. See also: July | August | September.
