Measurements:
°C
°F
Lanai
70°F
SW 9 mph
Feels like: 70°F
Precip: 76%
World Resorts USA Lanai Weather

Lanai Sea Water Temperature

Current Sea Water Temperature:
+77.8°F
Maximum Sea Water Temperature in April: 82.6°F
Minimum Sea Water Temperature in April: 77.8°F
Average water temperature in April: 79.9°F

Sea Water Temperature for the Last 10 Days:

April 03 77.8°F March 29 79.0°F
April 02 78.2°F March 28 79.2°F
April 01 78.2°F March 27 79.2°F
March 31 78.2°F March 26 79.0°F
March 30 78.6°F March 25 79.2°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 77.7 °F
The most rainy months:
March 1 day
February 1 day
January 1 day
The most windy months:
February 9 mph
March 8 mph
April 8 mph

Lanai on the Weather Map

USA Resorts:
NAME
Chicago +46
Hawaii +74
Honolulu +74
Houston +74
Las Vegas +54
Los Angeles +56
Maui +66
Miami +74
Miami Beach +78
New York +40
San Diego +58
San Francisco +50
Sarasota +72
Tampa +72
Washington +48
24 Hours Weather Forecast
Lanai
Local time: 23:47
03 apr, friday
0000 70°F
SW
9 mph
0300 70°F
SW
10 mph
0600 70°F
SW
6 mph
0900 72°F
SW
6 mph
1200 72°F
W
5 mph
1500 72°F
SW
11 mph
1800 72°F
SW
12 mph
2100 70°F
SW
11 mph