S
M
T
W
T
F
S
26
63°
51°
27
61°
50°
28
61°
50°
29
60°
52°
30
61°
52°
31
61°
50°
1
62°
52°
2
61°
52°
3
60°
51°
4
62°
52°
5
61°
49°
6
61°
48°
7
62°
48°
8
61°
46°
9
63°
50°
10
64°
48°
11
63°
49°
12
66°
50°
13
67°
45°
14
65°
50°
15
66°
48°
16
65°
48°
17
66°
45°
18
66°
48°
19
65°
46°
20
65°
49°
21
64°
46°
22
63°
43°
23
59°
43°
24
57°
42°
25
57°
42°
26
58°
43°
27
59°
46°
28
61°
44°
29
57°
43°
30
58°
42°
31
57°
45°
1
56°
41°
2
56°
43°
3
57°
44°
4
57°
44°
5
56°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Port Nikiski
Port Nikiski's August 2026 forecast shows daily high temperatures ranging from 56° to 67°, with overnight lows between 41° and 52°. The average high for August is 61° with an average low of 47°. 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 Nikiski. See also: September | October | November.
