Hawaii Weather Guide & Forecast

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What’s the weather like in Hawaii?

Temperatures

Hawaii’s weather is warm all year round with daytime high temperatures ranging from 78F in the “colder” months to 88F in the hotter months. Hawaii’s proximity to the equator means that the its weather is tropically warm and consistent throughout the year.

Typically December, January and February are the coolest months, while July, August and September are the warmest months.

Evening low temperatures range from 65F in the cooler months to 75F in the warmer months.

Rainfall

The months of April – October tend to have less rain than the months of November – March. The following chart shows how the average rainfall varies by month and by Hawaiian Island.

Hawaii-rainfall-chart

This chart indicates the average rainfall trends by island. The data was collected at the major Hawaii airports. Click this link to get more information and data to help you understand Hawaii rainfall trends.

An interesting aspect about Hawaii rainfall is that most if the Hawaiian Island precipitation falls overnight. Even if a rain shower should interrupt your day, it rarely lasts more than a few minutes before the glorious sunshine breaks through again. You may even be treated to a rainbow afterwards.

Micro-climates 

Each Hawaii island boasts its own micro-climate depending on where you stay. The island weather is very much influenced by the trade winds which generate windward and leeward regions. In general, the north and east facing coasts tend to get more rain than the south and west-facing coasts. From the following satellite view of Hawaii, notice how the north and east sides are very green in comparison to the other sides. That’s an indicator of the rainfall levels.

Satellite view of the Hawaiian Islands

Satellite view of the Hawaiian Islands

The tall volcanic mountains of Hawaii are significantly colder than the beach elevations. With elevations over 13,000 feet above sea level, it’s not unusual for Mauna Kea and Mauna Loa on the Big Island to get snow in the winter. At an elevation over 10,000 feet above sea level Haleakala on Maui can also get snow.

Oahu’s Weather

oahu average high and low temperatures by month

Average high and low temperatures by month for Oahu. Data sourced by GoVisitHawaii.com from Weather.com

The southern side of Oahu, including Waikiki and Honolulu along with the southwest coast at Ko Olina are your best bet for lots of Hawaiian sunshine. Though the North Shore also gets it’s fair share of sunshine. We wouldn’t hesitate to head to any part of Oahu any day of the year.

The upcoming Oahu forecast is as follows:

Partly Cloudy
Friday 07/31/20150%
Partly Cloudy
Windy with a mix of clouds and sun. High 83F. Winds ENE at 20 to 30 mph.
Partly Cloudy
Saturday 08/01/20150%
Partly Cloudy
Partly cloudy and windy. High 82F. Winds ENE at 20 to 30 mph.
Partly Cloudy
Sunday 08/02/201510%
Partly Cloudy
Intervals of clouds and sunshine. High 82F. Winds ENE at 15 to 25 mph.
Clear
Monday 08/03/201510%
Clear
Mostly sunny. High 82F. Winds NE at 15 to 25 mph.
Chance of Rain
Tuesday 08/04/201540%
Chance of Rain
Cloudy with occasional showers. High 84F. Winds ENE at 10 to 20 mph. Chance of rain 40%.

 

Maui’s Weather

Maui year round average high and low temperatures

Average high and low temperatures by month for Maui. Data sourced by GoVisitHawaii.com from Weather.com

Choose the sunny South Coast near Wailea for a nearly guaranteed sunshine all year round. While, Lahaina Kaanapali and Kapalua in West Maui get a bit more rain as compared to South Maui, overall the area has relatively low rain levels and good amounts of beautiful Hawaiian sun.

The windward east side of Maui, including beautiful Hana, tend to have a more rain which creates those beautiful waterfalls and rainforests.

If you plan to venture to to the top of Maui’s inactive volcano, Haleakala, plan to bring a warm windproof jacket, hat and gloves as it can get cold – especially overnight during the night.

The upcoming Maui forecast is as follows:

Partly Cloudy
Friday 07/31/20150%
Partly Cloudy
Windy with a mix of clouds and sun. High near 90F. Winds NE at 20 to 30 mph.
Partly Cloudy
Saturday 08/01/201520%
Partly Cloudy
Windy with a few clouds from time to time. High 86F. Winds NE at 20 to 30 mph.
Partly Cloudy
Sunday 08/02/201510%
Partly Cloudy
Partly cloudy skies with gusty winds. High 86F. Winds NE at 20 to 30 mph.
Partly Cloudy
Monday 08/03/201510%
Partly Cloudy
Mostly sunny. Becoming windy during the afternoon. High 87F. Winds NE at 20 to 30 mph.
Clear
Tuesday 08/04/201520%
Clear
Generally sunny despite a few afternoon clouds. High 88F. Winds NE at 15 to 25 mph.

 

Kauai’s Weather

Kauai year round average high and low temperatures

Average high and low temperatures by month for Kauai. Data sourced by GoVisitHawaii.com from Weather.com

Princeville and Hanalei on the North Shore of Kauai brings a mixture of sunshine and showers needed to make all of the wonderful rainbows and waterfalls.

The East and South shores are likely to offer more sunshine and less rainfall.

The upcoming Kauai forecast is as follows:

Chance of Rain
Friday 07/31/201540%
Chance of Rain
Rain showers this morning with some sunshine during the afternoon hours. High around 85F. Winds ENE at 15 to 25 mph. Chance of rain 40%.
Chance of Rain
Saturday 08/01/201530%
Chance of Rain
A shower or two around the area in the morning, then partly cloudy in the afternoon. High near 85F. Winds ENE at 15 to 25 mph. Chance of rain 30%.
Partly Cloudy
Sunday 08/02/20150%
Partly Cloudy
Partly cloudy skies. High 84F. Winds NE at 15 to 25 mph.
Partly Cloudy
Monday 08/03/201520%
Partly Cloudy
Sunshine and clouds mixed. High 84F. Winds NE at 10 to 20 mph.
Chance of Rain
Tuesday 08/04/201540%
Chance of Rain
Considerable cloudiness with occasional rain showers. High around 85F. Winds NE at 10 to 20 mph. Chance of rain 40%.

 

The Big Island’s Weather

kona hawaii average monthly high and low temperatures

Average high and low temperatures by month for Kona on Hawaii, the Big Island. Data sourced by GoVisitHawaii.com from Weather.com

The Big Island of Hawaii offers the most diverse climates within the Hawaiian Islands. Climatologists have determined that the Big Island has 11 of the world’s 13 climate zones.

The Kohala and Kona coasts on the west of the Big Island are your best bets for plenty of sun and little rain. The Kohala Coast, in particular offers one of the sunniest resort spots in all of Hawaii.

In comparison to the dry Kona and Kohala coasts, Hilo on the East side tends to have significant amounts of rain year round. In fact, compared to all the other Hawaiian airports where weather data is collected, Hilo receives several more inches of rain on average.

If you visit the higher elevations, you want to be prepared for chillier temperatures. If you go into Waimea town in the evening, you’ll want to have a light sweater. If you go up to the summits of Mauna Kea and Mauna Loa, you’ll want to wear long pants and a coat.

The upcoming Kona forecast is as follows:

Chance of Rain
Friday 07/31/201540%
Chance of Rain
Partly cloudy this morning. Increasing clouds with periods of showers this afternoon. High 87F. Winds WSW at 10 to 15 mph. Chance of rain 40%.
Chance of Rain
Saturday 08/01/201540%
Chance of Rain
Partly cloudy skies during the morning hours will give way to occasional showers in the afternoon. High 87F. Winds SSW at 10 to 15 mph. Chance of rain 40%.
Partly Cloudy
Sunday 08/02/201520%
Partly Cloudy
Partly cloudy. High 88F. Winds SW at 10 to 15 mph.
Chance of Rain
Monday 08/03/201530%
Chance of Rain
Sunny skies early. A few showers developing later in the day. High 87F. Winds WSW at 10 to 15 mph. Chance of rain 30%.
Chance of Rain
Tuesday 08/04/201570%
Chance of Rain
Mostly sunny skies during the morning hours will give way to occasional showers in the afternoon. High 89F. Winds W at 10 to 15 mph. Chance of rain 70%.

 

Lanai’s Weather

Lanai City year round temperatures

Average high and low temperatures by month for Lana’i. Data sourced by GoVisitHawaii.com from Weather.com

The island of Lana’i has just a few areas where you’ll find lodging — in Lanai City and nearby Koele in the upcountry and Manele Bay down on the coast. The highlands or upcountry of Lanai enjoy a mild/cooler climate as compared to the warmer and sunnier Manele Bay. Please note that the above chart is based on the Lanai City in the higher elevation. To estimate weather in Manele Bay, add about 10 degrees Fahrenheit to Lanai City temperatures.

The upcoming Lanai City forecast is as follows:

Clear
Friday 07/31/20150%
Clear
Abundant sunshine. High 82F. Winds E at 10 to 20 mph.
Partly Cloudy
Saturday 08/01/20150%
Partly Cloudy
Mostly sunny skies with gusty winds. High around 80F. Winds ENE at 20 to 30 mph.
Partly Cloudy
Sunday 08/02/20150%
Partly Cloudy
Partly cloudy. Gusty winds in the afternoon. High around 80F. Winds NE at 20 to 30 mph.
Clear
Monday 08/03/201510%
Clear
Sunny skies. High 81F. Winds NE at 15 to 25 mph.
Clear
Tuesday 08/04/201520%
Clear
A mainly sunny sky. High around 80F. Winds ENE at 10 to 20 mph.

 

Molokai’s Weather

molokai high and low temperature chart year round

Average high and low temperatures by month for Molokai. Data sourced by GoVisitHawaii.com from Weather.com

Molokai’s weather doesn’t vary quite as much as some of the other Hawaiian Islands. The north and east sides of the island are rainier than the south and west sides of the island.

The upcoming Molokai forecast is as follows.

Partly Cloudy
Friday 07/31/20150%
Partly Cloudy
A mix of clouds and sun with gusty winds. High 86F. Winds ENE at 20 to 30 mph.
Partly Cloudy
Saturday 08/01/20150%
Partly Cloudy
Partly cloudy skies with gusty winds. High around 85F. Winds ENE at 20 to 30 mph.
Partly Cloudy
Sunday 08/02/20150%
Partly Cloudy
Partly cloudy skies. High near 85F. Winds ENE at 15 to 25 mph.
Clear
Monday 08/03/201510%
Clear
Mainly sunny. High around 85F. Winds NE at 10 to 20 mph.
Chance of Rain
Tuesday 08/04/201550%
Chance of Rain
Mostly sunny in the morning. Increasing clouds with showers later in the day. High near 85F. Winds ENE at 10 to 15 mph. Chance of rain 50%.

Frequently asked Hawaii weather questions:

When is the best time to go to Hawaii?

Anytime is a great time to go to Hawaii. We’ve been to Hawaii several times in every season and enjoyed wonderful weather. For the best weather and prices, we recommend visiting Hawaii in mid/late April, May, early/mid June, September and October. We provide many more details with advice on when to visit Hawaii in this article: which time of year is best for visiting Hawaii.

Is Hawaii cold in the winter?

We don’t think it’s cold. Look at the above weather charts which indicate that even in the coldest months, the average daytime high temperatures average between 78 and 82F, which is quite pleasant. You’d have to visit Hawaii during a particularly odd weather pattern to be cold in Hawaii. During winter months, you might want to have a light sweater to wear in the evenings, but during the daytime, you’ll most likely enjoy “bikini weather” while playing in the ocean.

Is Hawaii’s weather humid?

The degree to which a person feels humidity depends on the humidity of the climate where they live. For example, someone who lives in the humid southeastern United States probably won’t notice much humidity, while someone from an arid southwestern state may take more notice in the humidity.

If the tradewinds are blowing, which they normally do, the breeze helps to keep you comfortable in the humid environment.

Do I need to be concerned about rain in Hawaii during the winter months?

As we’ve previously mentioned, the north and east sides of the island tend to get more rain than the south and west sides of the islands. If you plan to stay on the south and west sides of the islands, you’ll likely minimize your chances of experiencing rain. See our article on where to stay to avoid rain in Hawaii.

Is winter a good time to go to Hawaii?

Yes! See our article about visiting Hawaii in the winter.

Are the northern Hawaiian Islands colder than the southern Hawaiian Islands? 

There’s perhaps just a few degrees difference between the extremes, but nothing drastic. If you flew from one island to the other, you probably wouldn’t notice a difference. Review the above temperature charts for Kauai, the northernmost Hawaiian Island, to the Big Island, the southernmost Hawaiian Island for comparison. Note that there’s very little difference.

What’s the water temperature in Hawaii? Can I swim in Hawaii in the colder winter months?

You can swim in the ocean in Hawaii throughout the year — even in winter months. The average ocean temperature for Honolulu is 78F and ranges from a low of 76F to 81F. See this link for more information.

 

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