S
M
T
W
T
F
S
27
87°
76°
28
88°
76°
29
89°
75°
30
89°
76°
1
88°
75°
2
87°
75°
3
85°
74°
4
84°
75°
5
86°
75°
6
88°
76°
7
87°
76°
8
88°
75°
9
88°
75°
10
87°
74°
11
88°
74°
12
85°
73°
13
81°
68°
14
80°
66°
15
79°
66°
16
80°
68°
17
81°
73°
18
81°
70°
19
80°
66°
20
78°
65°
21
78°
65°
22
80°
71°
23
87°
71°
24
88°
71°
25
84°
65°
26
87°
64°
27
79°
66°
28
78°
70°
29
83°
71°
30
85°
65°
31
86°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Port Isabel
Port Isabel's October 2026 forecast shows daily high temperatures ranging from 78° to 89°, with overnight lows between 62° and 76°. The average high for October is 84° with an average low of 71°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Port Isabel. See also: November | December | January.
