S
M
T
W
T
F
S
26
54°
43°
27
56°
44°
28
53°
45°
29
54°
48°
30
55°
47°
1
55°
49°
2
56°
50°
3
56°
49°
4
55°
49°
5
56°
48°
6
56°
47°
7
55°
49°
8
57°
50°
9
57°
50°
10
56°
49°
11
58°
50°
12
57°
49°
13
56°
50°
14
57°
51°
15
57°
51°
16
58°
52°
17
58°
52°
18
55°
51°
19
56°
52°
20
57°
52°
21
57°
53°
22
56°
52°
23
54°
53°
24
58°
52°
25
55°
53°
26
57°
50°
27
57°
52°
28
59°
53°
29
55°
49°
30
55°
50°
31
56°
48°
1
57°
51°
2
60°
47°
3
60°
52°
4
59°
51°
5
61°
55°
6
61°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Boscastle
Boscastle's May 2026 forecast shows daily high temperatures ranging from 53° to 61°, with overnight lows between 43° and 55°. The average high for May is 57° with an average low of 50°. 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 Boscastle. See also: June | July | August.
