S
M
T
W
T
F
S
30
77°
56°
31
76°
51°
1
72°
51°
2
69°
52°
3
69°
51°
4
70°
51°
5
69°
52°
6
68°
50°
7
69°
50°
8
71°
51°
9
68°
54°
10
68°
52°
11
69°
55°
12
72°
54°
13
71°
53°
14
72°
51°
15
66°
49°
16
67°
50°
17
64°
49°
18
65°
52°
19
70°
54°
20
Hist. Avg.
69°
48°
21
Hist. Avg.
69°
47°
22
Hist. Avg.
68°
47°
23
Hist. Avg.
68°
46°
24
Hist. Avg.
68°
46°
25
Hist. Avg.
67°
46°
26
Hist. Avg.
67°
45°
27
Hist. Avg.
66°
45°
28
Hist. Avg.
66°
45°
29
Hist. Avg.
66°
44°
30
Hist. Avg.
65°
44°
1
Hist. Avg.
65°
43°
2
Hist. Avg.
64°
43°
3
Hist. Avg.
64°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Boothbay Harbor
Boothbay Harbor's September 2026 forecast shows daily high temperatures ranging from 64° to 77°, with overnight lows between 49° and 56°. The average high for September is 70° with an average low of 52°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Boothbay Harbor. See also: October | November | December.
