Measurements:
°C
°F
Lanai
76°F
W 3 mph
Feels like: 80°F
Precip: 68%
World Resorts USA Lanai Weather

Lanai Sea Water Temperature

Current Sea Water Temperature:
+81.2°F
Maximum Sea Water Temperature in May: 82.8°F
Minimum Sea Water Temperature in May: 79.2°F
Average water temperature in May: 80.8°F

Sea Water Temperature for the Last 10 Days:

May 14 81.2°F May 09 81.4°F
May 13 81.0°F May 08 81.4°F
May 12 81.2°F May 07 81.2°F
May 11 81.4°F May 06 80.6°F
May 10 81.2°F May 05 80.6°F

When is the Warmest Sea for Lanai?

According to our data for the last three years for Lanai the highest average sea water temperature was in October, September and August.

Average Water Temperature by Month, °F

Sea Water Temperature in October

Select Year: 2025 2024 2023

The average sea surface temperature in October 2025 for Lanai was 84.4°F. The maximum and minimum values were 82.8°F and 86.0°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Lanai was 84.5°F. The maximum and minimum values were 83.6°F and 85.4°F respectively.

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Lanai was 84.6°F. The maximum and minimum values were 83.8°F and 85.2°F respectively.

Best Time to Visit Lanai
The most sunny months:
August 21 days
July 21 days
September 17 days
The most warm months:
September 82.8 °F
August 82.2 °F
October 82.2 °F
Warmest sea temperature:
October 84.1 °F
September 84.0 °F
August 83.6 °F
The most cold months:
February 76.8 °F
March 77.3 °F
April 77.4 °F
The most rainy months:
March 1 day
February 1 day
January 1 day
The most windy months:
February 9 mph
March 8 mph
July 8 mph

Lanai on the Weather Map

USA Resorts:
NAME
Boston +56
Chicago +58
Hawaii +78
Honolulu +78
Houston +104
Las Vegas +102
Los Angeles +76
Maui +72
Miami +90
Miami Beach +92
New York +70
San Diego +72
San Francisco +72
Sarasota +96
Tampa +96
24 Hours Weather Forecast
Lanai
Local time: 08:58
14 may, thursday
0900 76°F
W
3 mph
1200 76°F
E
2 mph
1500 78°F
NW
1 mph
1800 76°F
N
2 mph
2100 76°F
S
3 mph
15 may, friday
0000 74°F
W
2 mph
0300 74°F
NW
2 mph
0600 74°F
SW
4 mph