S
M
T
W
T
F
S
26
67°
53°
27
68°
52°
28
69°
55°
29
70°
56°
30
72°
55°
1
72°
56°
2
71°
57°
3
72°
56°
4
69°
49°
5
68°
48°
6
63°
48°
7
63°
49°
8
64°
49°
9
65°
50°
10
65°
49°
11
66°
50°
12
65°
50°
13
69°
53°
14
68°
50°
15
65°
50°
16
64°
50°
17
65°
51°
18
70°
53°
19
69°
54°
20
71°
56°
21
73°
55°
22
67°
54°
23
65°
52°
24
67°
54°
25
67°
53°
26
65°
53°
27
65°
54°
28
66°
53°
29
65°
54°
30
67°
57°
31
70°
58°
1
70°
59°
2
73°
60°
3
75°
60°
4
74°
57°
5
75°
58°
6
74°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Oceanside
Oceanside's May 2026 forecast shows daily high temperatures ranging from 63° to 75°, with overnight lows between 48° and 60°. The average high for May is 68° 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 May weather will actually feel in Oceanside. See also: June | July | August.
