S
M
T
W
T
F
S
29
49°
29°
30
65°
42°
31
68°
48°
1
78°
50°
2
52°
41°
3
58°
41°
4
70°
41°
5
57°
42°
6
57°
41°
7
56°
33°
8
45°
30°
9
47°
32°
10
52°
39°
11
64°
47°
12
52°
41°
13
75°
46°
14
80°
55°
15
79°
60°
16
80°
57°
17
79°
52°
18
62°
47°
19
N/A
20
52°
35°
21
52°
44°
22
56°
49°
23
69°
50°
24
64°
46°
25
59°
46°
26
59°
45°
27
60°
46°
28
63°
48°
29
60°
48°
30
60°
45°
1
64°
48°
2
61°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
April Weather in Roslyn Harbor
Roslyn Harbor's April 2026 forecast shows daily high temperatures ranging from 52° to 69°, with overnight lows between 35° and 50°. The average high for April is 60° with an average low of 46°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Roslyn Harbor. See also: May | June | July.
