S
M
T
W
T
F
S
27
87°
76°
28
86°
76°
29
87°
76°
30
89°
75°
1
87°
75°
2
86°
74°
3
87°
76°
4
87°
75°
5
84°
75°
6
86°
74°
7
87°
75°
8
86°
69°
9
82°
68°
10
83°
69°
11
82°
68°
12
82°
67°
13
85°
70°
14
86°
73°
15
88°
74°
16
87°
74°
17
87°
73°
18
86°
74°
19
87°
74°
20
87°
73°
21
86°
73°
22
82°
72°
23
82°
72°
24
81°
71°
25
84°
71°
26
80°
64°
27
79°
69°
28
81°
70°
29
85°
71°
30
86°
72°
31
85°
66°
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 79° to 89°, with overnight lows between 64° and 76°. The average high for October is 85° with an average low of 72°. 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.
