S
M
T
W
T
F
S
28
66°
59°
29
64°
59°
30
66°
59°
1
64°
59°
2
68°
54°
3
66°
52°
4
68°
59°
5
70°
54°
6
75°
54°
7
81°
57°
8
79°
55°
9
79°
57°
10
88°
64°
11
91°
63°
12
89°
66°
13
84°
65°
14
83°
63°
15
82°
63°
16
79°
62°
17
74°
60°
18
72°
59°
19
71°
58°
20
71°
57°
21
69°
57°
22
70°
56°
23
67°
60°
24
68°
60°
25
68°
60°
26
69°
61°
27
70°
61°
28
68°
60°
29
67°
59°
30
69°
60°
31
69°
60°
1
68°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Port Isaac
Port Isaac's July 2026 forecast shows daily high temperatures ranging from 67° to 91°, with overnight lows between 56° and 66°. The average high for July is 74° with an average low of 61°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Port Isaac. See also: August | September | October.
