S
M
T
W
T
F
S
26
66°
57°
27
66°
57°
28
65°
56°
29
66°
58°
30
68°
58°
31
69°
57°
1
69°
57°
2
66°
56°
3
66°
57°
4
67°
58°
5
68°
58°
6
69°
57°
7
69°
58°
8
68°
57°
9
70°
58°
10
69°
58°
11
69°
57°
12
68°
58°
13
68°
58°
14
69°
57°
15
66°
57°
16
65°
56°
17
66°
57°
18
67°
57°
19
66°
56°
20
66°
57°
21
68°
53°
22
65°
57°
23
66°
56°
24
66°
56°
25
65°
55°
26
67°
56°
27
66°
55°
28
65°
54°
29
64°
55°
30
64°
54°
31
65°
55°
1
65°
56°
2
67°
55°
3
64°
56°
4
65°
55°
5
66°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Larne
Larne's August 2026 forecast shows daily high temperatures ranging from 64° to 70°, with overnight lows between 53° and 58°. The average high for August is 67° with an average low of 56°. 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 Larne. See also: September | October | November.