S
M
T
W
T
F
S
26
68°
40°
27
58°
48°
28
60°
44°
29
65°
36°
30
68°
44°
31
72°
41°
1
76°
49°
2
70°
49°
3
61°
54°
4
65°
53°
5
68°
54°
6
67°
54°
7
62°
49°
8
63°
52°
9
69°
43°
10
70°
45°
11
70°
47°
12
73°
48°
13
72°
51°
14
75°
51°
15
70°
53°
16
64°
53°
17
57°
47°
18
53°
46°
19
59°
42°
20
57°
42°
21
55°
44°
22
54°
40°
23
56°
41°
24
61°
44°
25
62°
42°
26
59°
40°
27
58°
38°
28
53°
43°
29
54°
42°
30
52°
39°
31
51°
37°
1
50°
37°
2
50°
35°
3
51°
34°
4
51°
38°
5
50°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lagoon
Lagoon's August 2026 forecast shows daily high temperatures ranging from 50° to 75°, with overnight lows between 34° and 53°. The average high for August is 57° with an average low of 42°. 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 Lagoon. See also: September | October | November.