S
M
T
W
T
F
S
26
98°
77°
27
94°
68°
28
86°
63°
29
94°
69°
30
90°
71°
31
72°
65°
1
85°
63°
2
84°
62°
3
87°
64°
4
78°
59°
5
80°
56°
6
84°
54°
7
79°
61°
8
83°
59°
9
82°
64°
10
84°
67°
11
87°
64°
12
89°
63°
13
78°
67°
14
82°
62°
15
82°
68°
16
80°
62°
17
85°
64°
18
82°
58°
19
78°
54°
20
81°
62°
21
79°
58°
22
79°
49°
23
78°
54°
24
80°
63°
25
86°
58°
26
82°
59°
27
80°
58°
28
81°
60°
29
83°
59°
30
81°
58°
31
79°
61°
1
81°
56°
2
70°
53°
3
71°
52°
4
78°
59°
5
76°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Marine On Saint Croix
Marine On Saint Croix's August 2026 forecast shows daily high temperatures ranging from 70° to 86°, with overnight lows between 49° and 63°. The average high for August is 79° with an average low of 57°. 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 Marine On Saint Croix. See also: September | October | November.