Measurements:
°C
°F
Lanai
78°F
NW 3 mph
Feels like: 80°F
Precip: 7%
World Resorts USA Lanai Weather

Lanai Sea Water Temperature

Current Sea Water Temperature:
+82.8°F
Maximum Sea Water Temperature in July: 84.8°F
Minimum Sea Water Temperature in July: 81.6°F
Average water temperature in July: 83.0°F

Sea Water Temperature for the Last 10 Days:

July 15 82.8°F July 10 83.0°F
July 14 82.8°F July 09 82.8°F
July 13 83.0°F July 08 82.8°F
July 12 83.2°F July 07 83.0°F
July 11 83.2°F July 06 82.8°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 +94
Chicago +88
Hawaii +80
Houston +90
Las Vegas +120
Los Angeles +106
Maui +76
Miami +100
Myrtle Beach +96
New York +114
San Diego +96
San Francisco +76
Santa Monica +84
Sarasota +102
Tampa +100
24 Hours Weather Forecast
Lanai
Local time: 08:18
15 jul, wednesday
0900 78°F
NW
3 mph
1200 78°F
N
5 mph
1500 78°F
W
1 mph
1800 78°F
W
1 mph
2100 78°F
SW
3 mph
16 jul, thursday
0000 78°F
W
2 mph
0300 76°F
SW
2 mph
0600 76°F
S
5 mph