Measurements:
°C
°F
Lanai
82°F
NW 1 mph
Feels like: 86°F
Precip: 4%
World Resorts USA Lanai Weather

Lanai Sea Water Temperature

Current Sea Water Temperature:
+84.4°F
Maximum Sea Water Temperature in August: 85.2°F
Minimum Sea Water Temperature in August: 82.2°F
Average water temperature in August: 83.6°F

Sea Water Temperature for the Last 10 Days:

August 25 84.4°F August 20 82.8°F
August 24 84.6°F August 19 82.6°F
August 23 84.8°F August 18 83.4°F
August 22 84.2°F August 17 83.6°F
August 21 83.6°F August 16 84.2°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: 2026 2025 2024

The average sea surface temperature in August 2026 for Lanai was 83.9°F. The maximum and minimum values were 82.6°F and 84.8°F respectively.

Best Time to Visit Lanai
The most sunny months:
August 21 days
July 20 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
January 8 mph

Lanai on the Weather Map

USA Resorts:
NAME
Boston +80
Chicago +80
Hawaii +84
Houston +106
Las Vegas +116
Los Angeles +96
Maui +70
Miami +92
Myrtle Beach +84
New York +82
San Diego +96
San Francisco +64
Santa Monica +86
Sarasota +92
Washington +84
24 Hours Weather Forecast
Lanai
Local time: 11:45
25 aug, tuesday
1200 82°F
NW
1 mph
1500 82°F
NE
4 mph
1800 80°F
S
4 mph
2100 78°F
SW
11 mph
26 aug, wednesday
0000 78°F
SW
9 mph
0300 76°F
SW
9 mph
0600 76°F
SW
10 mph
0900 78°F
SW
11 mph