S
M
T
W
T
F
S
26
87°
67°
27
83°
66°
28
82°
63°
29
79°
60°
30
79°
66°
31
80°
64°
1
82°
66°
2
81°
67°
3
86°
67°
4
86°
66°
5
82°
64°
6
81°
65°
7
86°
67°
8
87°
65°
9
85°
66°
10
85°
65°
11
80°
61°
12
84°
64°
13
85°
66°
14
81°
59°
15
77°
58°
16
77°
58°
17
80°
65°
18
78°
64°
19
78°
65°
20
79°
65°
21
81°
64°
22
78°
63°
23
78°
63°
24
82°
57°
25
80°
62°
26
85°
63°
27
84°
62°
28
85°
63°
29
77°
56°
30
75°
58°
31
77°
63°
1
81°
63°
2
76°
62°
3
82°
62°
4
81°
54°
5
76°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Port Washington
Port Washington's August 2026 forecast shows daily high temperatures ranging from 75° to 87°, with overnight lows between 54° and 67°. The average high for August is 81° with an average low of 63°. 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 Washington. See also: September | October | November.