19.09
sat
sat
Day
79°F
S 2 mph
Precip.
14%
14%
Night
75°F
W 3 mph
Precip.
18%
18%
20.09
sun
sun
Day
79°F
W 6 mph
Precip.
5%
5%
Night
75°F
W 6 mph
Precip.
18%
18%
21.09
mon
mon
Day
79°F
SW 6 mph
Precip.
4%
4%
Night
77°F
SW 6 mph
Precip.
8%
8%
22.09
tue
tue
Day
79°F
NE 2 mph
Precip.
17%
17%
Night
77°F
SW 6 mph
Precip.
18%
18%
23.09
wed
wed
Day
79°F
SW 7 mph
Precip.
8%
8%
Night
77°F
SW 6 mph
Precip.
13%
13%
24.09
thu
thu
Day
79°F
SW 6 mph
Precip.
14%
14%
Night
75°F
SW 8 mph
Precip.
20%
20%
25.09
fri
fri
Day
77°F
SW 8 mph
Precip.
15%
15%
Night
73°F
SW 12 mph
Precip.
7%
7%
26.09
sat
sat
Day
77°F
W 12 mph
Precip.
9%
9%
Night
73°F
SW 12 mph
Precip.
6%
6%
27.09
sun
sun
Day
77°F
SW 9 mph
Precip.
6%
6%
Night
75°F
SW 7 mph
Precip.
17%
17%
28.09
mon
mon
Day
77°F
SW 8 mph
Precip.
4%
4%
Night
73°F
SW 10 mph
Precip.
10%
10%
29.09
tue
tue
Day
77°F
SW 8 mph
Precip.
3%
3%
Night
73°F
SW 6 mph
Precip.
5%
5%
30.09
wed
wed
Day
75°F
NE 4 mph
Precip.
3%
3%
Night
75°F
NE 2 mph
Precip.
12%
12%
01.10
thu
thu
Day
75°F
NE 7 mph
Precip.
5%
5%
Night
75°F
NE 9 mph
Precip.
46%
46%
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 81.0°F. The highest and lowest sea temperatures during the month were 81.9°F and 80.2°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 81.0°F. The highest and lowest sea temperatures during the month were 82.4°F and 79.5°F.
Air temperature in Lanai, °F
Precipitation total in Lanai, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Lanai
Lanai on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Lanai
Local time: 00:10
September 19, saturday
0300
77°F
S
5 mph
5 mph
0600
75°F
SW
5 mph
5 mph
0900
77°F
W
4 mph
4 mph
1200
79°F
S
2 mph
2 mph
1500
79°F
NW
4 mph
4 mph
1800
77°F
NW
2 mph
2 mph
2100
77°F
S
4 mph
4 mph
September 20, sunday
0000
75°F
W
3 mph
3 mph
