Best time to visit Lanai
For dry and sunny conditions the best time to visit Laanai is during summer, from July to late-September, when the average daytime high temperature is 30°C (86°F).
Lanai – Hawaii's most secluded island – is balmy and warm all year round; so any time of year is a good time to visit Lanai.
The rainy season lasts from December to March, when you can expect slightly cooler temperatures and heavy rain in the mountains and short showers elsewhere. Winter has an average daytime high temperature of 26°C (79°F).
Note: Hawaii is full of microclimates, given its many valleys, mountain peaks and coastal plains. The leeward sides (west and south coasts) of each island are usually hot and dry, while the windward sides (east and north coasts) are generally cooler and wet.
Here are the average temperatures for Lanai City, which is located in the centre of Lanai Island.
What is the best month to visit Lanai?
The best months to visit Lanai are from May to October, when the temperature is high but still comfortable due to the cooling effects of the trade winds.
For a beach holiday, the months of July through September are best since these months are the sunniest and hottest.
Lanai is a year-round destination, and even in winter, from December to March, when the temperatures are a bit cooler and rainfall is more frequent the weather is generally fine and sunny.
Which is the hottest month in Lanai?
The hottest month of year in Lanai is usually August, with an average high temperature of 30°C (86°F), moderately high heat and humidity, and a low of 23°C (73°F).
The warm season in Lanai lasts from early-July to mid-October, with an average daily high temperature above 28°C (82°F).
What is the humidity in Lanai?
Lanai experiences little seasonal variation in perceived humidity, with approximate average relative humidity calculated at between 63% – 68% over the course of the year.
What do the humidity conditions feel like in Lanai?
We derive the humidity comfort level – what conditions feel like – from the dew point temperature, which measures moisture content in the atmosphere: a higher dew point feels more humid, while a lower dew point feels drier.
Meteorologists agree that dew point temperature is a more consistant indication of 'absolute humidity' than relative humidity, which fluctuates with temperature.
The average annual dew point in Lanai is 18°C (64°F), and varies over the course of the year from 17°C (62°F) to 19°C (66°F) – starting to feel humid, but also comfortable for most people.
The more humid time of year in Lanai lasts from mid-May through to mid-December, when you can expect the comfort level to be muggy at least 25% of the time.
The month with the most muggy days in Lanai is August, with around 19 days that are muggy.
February, March and April are more comfortable, with less than five days in each month that are muggy.
Which is the coolest month in Lanai?
The coolest month in Lanai is January, with an average high of 25°C (77°F) and a low of 16°C (60°F).
The cooler season lasts from mid-December to mid-April, with an average daily high temperature below 27°C (80°F).
When is it sunniest in Lanai?
The sunniest time of year in Lanai is September with nine hours of sunshine on average per day – that's around 70% of daylight hours.
When is the sea warmest in Lanai?
The sea is usually at its warmest in Lanai in September when the water temperature reaches 27°C (80°F), which is pleasantly warm for swimming.
The sea around Lanai is warm enough to swim year-round.
Which month has the most rain in Lanai?
January is usually the wettest month in Lanai, with an average 86mm (3in) of rainfall distributed across seven days.
The rainy season in Lanai lasts from mid-November to late-April, with a greater than 17% chance of a given day being a wet day. Rain falls throughout the year in Lanai Island.
The drier season lasts from late-April to mid-November. The month with the least rainfall in Lanai is June, with an average rainfall of 34mm (1.3in).
What are the windiest months in Lanai?
The windiest month of the year in Lanai is July, with an average hourly wind speed of 23 kilometres per hour (12 knots; 14 mph).
June through to early-September are the windiest months of the year in Lanai, with average wind speeds of more than 21 kilometres per hour (11 knots; 13 mph).
It's less windy from early-September through to early-June. The calmest month of the year in Lanai is January, with an average hourly wind speed of 18 kilometres per hour (10 knots; 12 mph).
The predominant wind direction in Lanai is from the east throughout the year.
Lanai – Weather Averages
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Average high temperature (°C) | |||||||||||
| 26 | 26 | 26 | 27 | 28 | 29 | 30 | 30 | 30 | 29 | 28 | 27 |
| Average low temperature (°C) | |||||||||||
| 20 | 20 | 20 | 20 | 21 | 22 | 23 | 23 | 23 | 23 | 22 | 21 |
| Average daily sunshine (hrs) | |||||||||||
| 7 | 7 | 8 | 8 | 8 | 9 | 9 | 9 | 8 | 8 | 7 | 7 |
| Average daily daylight (hrs) | |||||||||||
| 11 | 11 | 12 | 12 | 13 | 13 | 13 | 12 | 12 | 11 | 11 | 11 |
| Comfort level – heat | |||||||||||
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| Comfort level – humidity (#muggy days) | |||||||||||
| 6 | 5 | 4 | 4 | 7 | 10 | 16 | 19 | 17 | 16 | 11 | 7 |
| Average dew point temperature (°C) | |||||||||||
| 17 | 17 | 17 | 17 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 18 |
| Average relative humidity (%) | |||||||||||
| 68 | 67 | 68 | 66 | 64 | 63 | 64 | 64 | 63 | 65 | 68 | 68 |
| UV Index (max) | |||||||||||
| 7 | 9 | 10 | 11 | 11 | 11 | 11+ | 11+ | 11 | 9 | 7 | 6 |
| Average days of rainfall (≥1mm) | |||||||||||
| 7 | 6 | 7 | 5 | 4 | 3 | 3 | 3 | 4 | 5 | 5 | 6 |
| Average monthly rainfall (mm) | |||||||||||
| 86 | 61 | 92 | 66 | 40 | 34 | 46 | 38 | 36 | 52 | 78 | 84 |
| Average wind speed (km/h) | |||||||||||
| 18 | 19 | 21 | 22 | 20 | 23 | 23 | 22 | 20 | 20 | 21 | 20 |
| Average sea temperature (°C) | |||||||||||
| 24 | 24 | 24 | 24 | 25 | 25 | 26 | 26 | 27 | 27 | 26 | 25 |
| Lanai, Hawaii | |||||||||||
Holiday seasons
High season: From mid-December through March or mid-April – expect to pay top dollar for accommodations, car rentals, and airfare.
Low season: For the best hotel rates and airfares, visit in spring from mid-April to mid-June and during autumn from September to mid-December.
Note: The last week in April and early May coincide with three major Japanese holidays.
Climate source: Meteorological data for Lanai is based on weather statistics gathered for the 30-year period 1992 to 2021 by the United States National Weather Service (NWS) from the closest weather station: Lanai Airport (LNY), located around 6km (3.4mi) southwest of Lanai City.
Advice on the best time to visit Lanai is based on average local weather statistics, when the weather conditions are generally better than at other times of the year. We consider high and low temperatures, risk of rain (and thunderstorms, etc.), amount of sunshine and sea temperature. For general outdoor activities we favour clear, rainless days with a temperature range between 18°C (64°F) and 27°C (80°F); and for hot-weather activities we favour clear, rainless days with a temperature range between 24°C (75°F) and 32°C (89°F). Often, the best times to visit correspond to high season and therefore involve higher prices.
Latest update: Lanai weather: 29 April, 2025
Disclaimer: The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data and conditions at any given location and time are unpredictable and variable. We assume no responsibility and can not be held legally responsible for any decisions made on the basis of the information presented on this site.
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