S
M
T
W
T
F
S
26
90°
80°
27
92°
80°
28
90°
82°
29
91°
80°
30
90°
83°
31
91°
82°
1
90°
80°
2
90°
81°
3
90°
76°
4
92°
77°
5
95°
74°
6
91°
70°
7
91°
74°
8
93°
77°
9
93°
76°
10
96°
77°
11
94°
78°
12
93°
79°
13
92°
79°
14
93°
79°
15
96°
78°
16
93°
76°
17
94°
81°
18
93°
78°
19
92°
82°
20
92°
80°
21
93°
74°
22
93°
79°
23
93°
78°
24
91°
76°
25
93°
78°
26
92°
77°
27
89°
77°
28
90°
76°
29
92°
77°
30
93°
79°
31
92°
76°
1
91°
76°
2
91°
77°
3
92°
76°
4
91°
76°
5
93°
77°
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 76° 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.
