S
M
T
W
T
F
S
26
70°
57°
27
69°
57°
28
70°
58°
29
71°
58°
30
71°
57°
31
72°
60°
1
73°
57°
2
70°
57°
3
65°
54°
4
68°
57°
5
67°
53°
6
66°
57°
7
65°
56°
8
65°
55°
9
66°
54°
10
67°
53°
11
66°
52°
12
66°
52°
13
67°
53°
14
66°
51°
15
66°
56°
16
67°
56°
17
70°
55°
18
69°
56°
19
69°
54°
20
68°
51°
21
66°
56°
22
69°
56°
23
67°
55°
24
68°
52°
25
65°
51°
26
64°
52°
27
64°
51°
28
65°
56°
29
68°
56°
30
69°
50°
31
68°
54°
1
66°
54°
2
63°
52°
3
67°
53°
4
65°
53°
5
64°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Runswick Bay
Runswick Bay's August 2026 forecast shows daily high temperatures ranging from 63° to 73°, with overnight lows between 50° and 60°. The average high for August is 67° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Runswick Bay. See also: September | October | November.