S
M
T
W
T
F
S
27
N/A
28
63°
57°
29
72°
55°
30
68°
52°
1
73°
54°
2
74°
66°
3
72°
48°
4
63°
55°
5
72°
53°
6
61°
35°
7
64°
31°
8
75°
43°
9
72°
37°
10
68°
39°
11
62°
41°
12
71°
53°
13
67°
48°
14
81°
61°
15
65°
43°
16
67°
57°
17
62°
43°
18
56°
33°
19
60°
31°
20
64°
48°
21
57°
46°
22
64°
41°
23
56°
31°
24
59°
35°
25
59°
42°
26
66°
47°
27
61°
44°
28
53°
40°
29
53°
43°
30
59°
45°
31
53°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Sag Harbor
Sag Harbor's October 2026 forecast shows daily high temperatures ranging from 53° to 66°, with overnight lows between 31° and 48°. The average high for October is 59° with an average low of 42°. 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 Sag Harbor. See also: November | December | January.
