S
M
T
W
T
F
S
31
64°
57°
1
61°
55°
2
61°
54°
3
63°
52°
4
61°
49°
5
60°
52°
6
60°
53°
7
63°
54°
8
60°
52°
9
61°
53°
10
62°
54°
11
64°
52°
12
68°
53°
13
66°
54°
14
67°
53°
15
60°
53°
16
61°
57°
17
61°
55°
18
62°
54°
19
61°
55°
20
61°
57°
21
62°
57°
22
61°
58°
23
62°
58°
24
62°
57°
25
63°
56°
26
61°
56°
27
63°
55°
28
62°
56°
29
62°
58°
30
63°
57°
1
63°
56°
2
65°
59°
3
65°
59°
4
66°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Port Isaac
Port Isaac's June 2026 forecast shows daily high temperatures ranging from 60° to 68°, with overnight lows between 49° and 59°. The average high for June is 62° with an average low of 55°. 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 Port Isaac. See also: July | August | September.
