S
M
T
W
T
F
S
26
63°
41°
27
60°
49°
28
58°
51°
29
64°
46°
30
68°
46°
1
69°
50°
2
77°
52°
3
72°
51°
4
75°
51°
5
65°
54°
6
60°
51°
7
62°
53°
8
61°
52°
9
66°
49°
10
67°
52°
11
68°
52°
12
74°
49°
13
62°
53°
14
62°
52°
15
55°
49°
16
59°
47°
17
61°
46°
18
65°
50°
19
63°
52°
20
65°
48°
21
68°
48°
22
69°
51°
23
66°
53°
24
65°
49°
25
61°
52°
26
N/A
27
71°
51°
28
75°
53°
29
65°
48°
30
63°
47°
31
66°
47°
1
74°
53°
2
78°
53°
3
71°
55°
4
71°
53°
5
69°
54°
6
67°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Birch Bay
Birch Bay's May 2026 forecast shows daily high temperatures ranging from 63° to 78°, with overnight lows between 47° and 55°. The average high for May is 70° 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 Birch Bay. See also: June | July | August.