S
M
T
W
T
F
S
26
83°
68°
27
86°
68°
28
85°
67°
29
81°
65°
30
82°
64°
31
81°
66°
1
82°
64°
2
81°
64°
3
82°
63°
4
80°
64°
5
80°
63°
6
80°
64°
7
Hist. Avg.
81°
62°
8
Hist. Avg.
81°
62°
9
Hist. Avg.
80°
62°
10
Hist. Avg.
80°
62°
11
Hist. Avg.
80°
62°
12
Hist. Avg.
80°
62°
13
Hist. Avg.
80°
62°
14
Hist. Avg.
80°
61°
15
Hist. Avg.
80°
61°
16
Hist. Avg.
80°
61°
17
Hist. Avg.
80°
61°
18
Hist. Avg.
80°
61°
19
Hist. Avg.
80°
61°
20
Hist. Avg.
79°
61°
21
Hist. Avg.
79°
60°
22
Hist. Avg.
79°
60°
23
Hist. Avg.
79°
60°
24
Hist. Avg.
79°
60°
25
Hist. Avg.
79°
60°
26
Hist. Avg.
78°
60°
27
Hist. Avg.
78°
59°
28
Hist. Avg.
78°
59°
29
Hist. Avg.
78°
59°
30
Hist. Avg.
78°
58°
31
Hist. Avg.
77°
58°
1
Hist. Avg.
77°
58°
2
Hist. Avg.
77°
58°
3
Hist. Avg.
77°
57°
4
Hist. Avg.
76°
57°
5
Hist. Avg.
76°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Riverhead
Riverhead's August 2026 forecast shows daily high temperatures ranging from 80° to 86°, with overnight lows between 63° and 68°. The average high for August is 82° with an average low of 65°. 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 Riverhead. See also: September | October | November.
