S
M
T
W
T
F
S
26
72°
60°
27
72°
60°
28
71°
59°
29
72°
60°
30
72°
59°
31
69°
59°
1
71°
56°
2
66°
56°
3
70°
59°
4
70°
59°
5
69°
58°
6
70°
58°
7
68°
55°
8
67°
54°
9
69°
53°
10
67°
58°
11
69°
58°
12
69°
53°
13
67°
53°
14
67°
58°
15
68°
52°
16
67°
55°
17
67°
53°
18
68°
55°
19
67°
52°
20
68°
52°
21
67°
57°
22
68°
55°
23
67°
53°
24
69°
52°
25
66°
52°
26
66°
53°
27
67°
57°
28
68°
57°
29
70°
56°
30
71°
56°
31
71°
55°
1
70°
57°
2
70°
55°
3
68°
54°
4
69°
56°
5
69°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Newhaven
Newhaven's August 2026 forecast shows daily high temperatures ranging from 66° to 72°, with overnight lows between 52° and 60°. The average high for August is 69° with an average low of 56°. 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 Newhaven. See also: September | October | November.
