S
M
T
W
T
F
S
26
89°
78°
27
89°
78°
28
90°
77°
29
89°
78°
30
90°
79°
31
91°
78°
1
90°
78°
2
90°
78°
3
91°
77°
4
91°
78°
5
90°
78°
6
92°
79°
7
93°
79°
8
91°
78°
9
90°
78°
10
91°
76°
11
92°
77°
12
92°
76°
13
91°
77°
14
90°
76°
15
91°
77°
16
90°
77°
17
91°
76°
18
92°
77°
19
93°
77°
20
93°
76°
21
92°
77°
22
92°
77°
23
91°
76°
24
90°
77°
25
90°
76°
26
91°
76°
27
90°
77°
28
90°
77°
29
91°
76°
30
92°
77°
31
92°
76°
1
90°
75°
2
91°
76°
3
90°
75°
4
89°
76°
5
89°
76°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Marco Island
Marco Island's August 2026 forecast shows daily high temperatures ranging from 89° to 93°, with overnight lows between 75° and 79°. The average high for August is 91° with an average low of 77°. 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 Marco Island. See also: September | October | November.
