Measurements:
°C
°F
Lanai
78°F
NE 2 mph
Feels like: 80°F
Precip: 0%
World Resorts USA Lanai Weather

Lanai Sea Water Temperature

Current Sea Water Temperature:
+81.0°F
Maximum Sea Water Temperature in April: 82.6°F
Minimum Sea Water Temperature in April: 77.6°F
Average water temperature in April: 79.8°F

Sea Water Temperature for the Last 10 Days:

April 23 81.0°F April 18 79.4°F
April 22 80.8°F April 17 79.0°F
April 21 80.2°F April 16 78.6°F
April 20 79.6°F April 15 78.4°F
April 19 79.0°F April 14 78.0°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 +76
Hawaii +80
Honolulu +80
Houston +84
Las Vegas +88
Los Angeles +80
Maui +76
Miami +78
Miami Beach +78
New York +80
San Diego +76
San Francisco +66
Sarasota +82
Tampa +86
Washington +88
24 Hours Weather Forecast
Lanai
Local time: 10:37
23 apr, thursday
1200 78°F
NE
2 mph
1500 78°F
NE
1 mph
1800 78°F
SW
6 mph
2100 76°F
SW
11 mph
24 apr, friday
0000 76°F
SW
11 mph
0300 76°F
SW
7 mph
0600 74°F
SW
8 mph
0900 76°F
SW
9 mph