Measurements:
°C
°F
Lanai
78°F
S 1 mph
Feels like: 80°F
Precip: 0%
World Resorts USA Lanai Weather

Lanai Sea Water Temperature

Current Sea Water Temperature:
+83.2°F
Maximum Sea Water Temperature in December: 83.6°F
Minimum Sea Water Temperature in December: 79.8°F
Average water temperature in December: 81.6°F

Sea Water Temperature for the Last 10 Days:

December 04 83.2°F November 29 83.2°F
December 03 83.4°F November 28 83.0°F
December 02 83.6°F November 27 82.8°F
December 01 83.4°F November 26 82.4°F
November 30 83.6°F November 25 82.6°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
December 18 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 77.4 °F
April 77.7 °F
March 77.8 °F
The most rainy months:
December 1 day
February 1 day
January 1 day
The most windy months:
February 9 mph
January 8 mph
March 8 mph

Lanai on the Weather Map

USA Resorts:
NAME
Chicago 0
Hawaii +80
Honolulu +80
Houston +46
Las Vegas +44
Los Angeles +56
Maui +72
Miami +72
Miami Beach +80
New York +22
San Diego +58
San Francisco +48
Sarasota +64
Tampa +64
Washington +28
24 Hours Weather Forecast
Lanai
Local time: 18:39
04 dec, thursday
2100 76°F
S
7 mph
05 dec, friday
0000 82°F
NW
8 mph
0300 80°F
W
5 mph
0600 82°F
W
4 mph
0900 82°F
S
7 mph
1200 84°F
SW
4 mph
1500 78°F
NW
5 mph
1800 76°F
S
6 mph