S
M
T
W
T
F
S
26
51°
41°
27
55°
45°
28
51°
43°
29
49°
43°
30
56°
46°
1
59°
46°
2
55°
47°
3
52°
42°
4
59°
41°
5
59°
51°
6
N/A
7
58°
44°
8
58°
43°
9
56°
50°
10
60°
52°
11
57°
49°
12
57°
46°
13
56°
50°
14
60°
48°
15
61°
52°
16
63°
50°
17
62°
50°
18
61°
51°
19
62°
49°
20
58°
48°
21
59°
47°
22
58°
49°
23
58°
49°
24
60°
54°
25
60°
54°
26
64°
55°
27
64°
51°
28
61°
50°
29
61°
52°
30
62°
54°
31
67°
57°
1
67°
57°
2
63°
56°
3
64°
56°
4
66°
57°
5
66°
58°
6
69°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Harwich
Harwich's May 2026 forecast shows daily high temperatures ranging from 56° to 69°, with overnight lows between 43° and 58°. The average high for May is 61° with an average low of 51°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Harwich. See also: June | July | August.
