S
M
T
W
T
F
S
26
90°
76°
27
93°
76°
28
90°
75°
29
92°
77°
30
90°
78°
31
91°
75°
1
92°
73°
2
89°
74°
3
91°
73°
4
90°
73°
5
89°
75°
6
88°
78°
7
89°
77°
8
90°
76°
9
89°
77°
10
89°
76°
11
90°
75°
12
91°
77°
13
90°
77°
14
92°
76°
15
90°
78°
16
88°
77°
17
87°
78°
18
88°
78°
19
88°
77°
20
89°
78°
21
87°
78°
22
88°
77°
23
87°
78°
24
88°
78°
25
88°
77°
26
89°
78°
27
88°
78°
28
89°
77°
29
89°
77°
30
88°
78°
31
88°
78°
1
89°
77°
2
87°
78°
3
85°
78°
4
85°
77°
5
86°
78°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Port St. Lucie
Port St. Lucie's August 2026 forecast shows daily high temperatures ranging from 85° to 92°, with overnight lows between 73° and 78°. The average high for August is 89° 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 Port St. Lucie. See also: September | October | November.
