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Climate in The Hawaiian Islands

Weather in The Hawaiian Islands is very consistent, with only minor changes in temperature throughout the year. There are really only two seasons in Hawaii: summer (kau) from May to October and winter (hooilo) from November to April. The average daytime summer temperature at sea level is 85° F (29.4° C), while the average daytime winter temperature is 78° (25.6° C). Temperatures at night are approximately 10° F lower than the daytime.

Temperature & Climate Zones
The islands are an incredible collection of diverse micro-environments, each with its own unique weather plants and animals. As a result of the shielding effect of volcanic mountains and the differences in weather at various elevations, you can find tropical rainforests, cool alpine regions, arid deserts and sunny beaches—all within the span of just a few miles

Rainfall & Trade Winds
Throughout the year, Hawaiian weather patterns are affected primarily by high-pressure zones in the north Pacific that pump cool, moist trade winds down onto the islands’ northeastern slopes. These winds are forced upslope by the mountain heights, where their moisture condenses into clouds that produce rain. Most of the rain falls in the mountains and valleys on the windward (northeastern) side of the islands. It is this weather phenomenon that creates Hawaii’s rich, green, tropical environment.

The wettest months are from November to March, but winter rains do not generally disrupt vacation plans, since the weather is very localized. This means that if it is raining where you are, there is almost always a sunny spot to be found around the coast.

The Hawaiian Islands’ trade winds mean there is almost always a cooling breeze here. Several times during the year the trade winds will stop completely, and the wind will switch around to come out of the south or west, bringing stormy or hot, sticky weather. Islanders sometimes call this kona weather, because kona means leeward or south, and this points to the direction from which these weather systems arrive.

Water & Surf Conditions
The Hawaiian Islands’ near-shore water temperatures remain comfortable throughout the year. The average water temperature is 74° F (23.3° C), with a summer high of 80° F (26.7° C). Wave action varies dramatically between island coasts and seasons. Summer waters are typically gentle on all beaches. During the winter on many north shore beaches, Pacific storms drive ocean swells towards the islands, creating The Hawaiian Islands’ legendary big waves.

Wave conditions are often very localized, so if the waves are too big on your beach, you can usually find calmer water at a more sheltered beach. Strong currents can make any beach unsafe at any time during the year, particularly in the winter. Ask your hotel staff or a lifeguard about ocean currents or look for warning flags and posted beach conditions.

Please heed all weather warnings before hiking, swimming, sailing or participating in any outdoor activities.

Hawaii's Mountains & Volcanoes
Many visitors are drawn to the natural beauty found in higher elevations such as Kokee on Kauai, Haleakala on Maui or Kilauea on the island of Hawaii. Temperatures in these higher locations drop 3.5° F for every 1,000 feet above sea level that you climb, so dress appropriately with pants and several layers of clothing. At an elevation of 10,023 feet, the summit of Haleakala can be as much as 30° F cooler than resort areas on the coast.

Also note that because of these high elevations, there is less protection from the sun's powerful UV rays, so come prepared with sunblock and sunglasses.


VOG (Volcanic Fog)
Vog is the local term for "volcanic fog" and it describes the hazy air pollution that occasionally hangs over the islands. Vog is caused when sulfur dioxide and other gasses from Kilauea's Halemaumau Crater (on the island of Hawaii) mix with moisture in the air and sunlight. Under extreme conditions—when the volcano is active and the winds carry the fumes north to the rest of the island chain—vog can be hazardous to plants, animals and humans. The most common effects are headaches, watery eyes and breathing difficulties. These effects can be especially pronounced in people with respiratory conditions and young children. It is not advisable to exercise or participate in strenuous outdoor activities when the vog is very heavy. Depending on your personal sensitivity, you may want to learn more about vog before traveling to Hawaii Island and visiting Hawaii Volcanoes National Park.

Want to know what the vog conditions are around the island? Check your local news weather report.

Not all hazy conditions are caused by vog. If you see a white mist along the coast, it could simply be salt spray hanging in the air. Or if it's hazy along the mountains in the morning, chances are you're looking at moisture in the air from the updrafts along the ridges.

The Hawaiian Islands Weather

Kauai

Poipu, Kauai

TodayThunderstorms76°F24°C
Mon 08/10Breezy81°F27°C
Tue 08/11Rain79°F26°C
Wed 08/12Mostly Sunny80°F27°C
Thu 08/13Rain80°F27°C
Fri 08/14Mostly Sunny81°F27°C

Lihue

TodayThunderstorms76°F24°C
Mon 08/10Scattered Showers80°F27°C
Tue 08/11Scattered Thunderstorms78°F26°C
Wed 08/12Scattered Thunderstorms78°F26°C
Thu 08/13Scattered Thunderstorms78°F26°C
Fri 08/14Rain80°F27°C

Kapaa

TodayThunderstorms76°F24°C
Mon 08/10Partly Cloudy79°F26°C
Tue 08/11Scattered Thunderstorms78°F26°C
Wed 08/12Scattered Thunderstorms79°F26°C
Thu 08/13Scattered Thunderstorms79°F26°C
Fri 08/14Mostly Sunny79°F26°C

Oahu

Honolulu, Oahu

TodayBreezy76°F24°C
Mon 08/10Partly Cloudy82°F28°C
Tue 08/11Rain82°F28°C
Wed 08/12Scattered Showers82°F28°C
Thu 08/13Mostly Sunny83°F28°C
Fri 08/14Mostly Sunny83°F28°C

West Side

TodayMostly Clear76°F24°C
Mon 08/10Mostly Sunny84°F29°C
Tue 08/11Sunny84°F29°C
Wed 08/12Scattered Showers83°F28°C
Thu 08/13Rain84°F29°C
Fri 08/14Sunny85°F29°C

North Shore (Turtle Bay)

TodayBreezy77°F25°C
Mon 08/10Rain79°F26°C
Tue 08/11Scattered Showers79°F26°C
Wed 08/12Mostly Sunny79°F26°C
Thu 08/13Rain80°F27°C
Fri 08/14Partly Cloudy80°F27°C

Molokai

Hoolehua, Molokai

TodayMostly Clear76°F24°C
Mon 08/10Scattered Showers84°F29°C
Tue 08/11Sunny85°F29°C
Wed 08/12Mostly Sunny85°F29°C
Thu 08/13Sunny86°F30°C
Fri 08/14Sunny86°F30°C

Molokai Airport

TodayMostly Clear76°F24°C
Mon 08/10Scattered Showers84°F29°C
Tue 08/11Sunny85°F29°C
Wed 08/12Mostly Sunny85°F29°C
Thu 08/13Sunny86°F30°C
Fri 08/14Sunny86°F30°C

Kaunakakai City

TodayBreezy76°F24°C
Mon 08/10Mostly Sunny81°F27°C
Tue 08/11Sunny82°F28°C
Wed 08/12Mostly Sunny82°F28°C
Thu 08/13Sunny83°F28°C
Fri 08/14Sunny83°F28°C

Lanai

Lanai City, Lanai

TodayBreezy75°F24°C
Mon 08/10Breezy78°F26°C
Tue 08/11Breezy79°F26°C
Wed 08/12Mostly Sunny78°F26°C
Thu 08/13Sunny80°F27°C
Fri 08/14Breezy79°F26°C

Manele Bay Beach

TodayBreezy75°F24°C
Mon 08/10Breezy78°F26°C
Tue 08/11Breezy79°F26°C
Wed 08/12Mostly Sunny78°F26°C
Thu 08/13Sunny80°F27°C
Fri 08/14Breezy79°F26°C

Lanai Airport

TodayBreezy75°F24°C
Mon 08/10Breezy78°F26°C
Tue 08/11Breezy79°F26°C
Wed 08/12Mostly Sunny78°F26°C
Thu 08/13Sunny80°F27°C
Fri 08/14Breezy79°F26°C

Maui

Kahului Airport, Maui

TodayMostly Clear74°F23°C
Mon 08/10Mostly Sunny80°F27°C
Tue 08/11Mostly Sunny81°F27°C
Wed 08/12Partly Cloudy81°F27°C
Thu 08/13Mostly Sunny81°F27°C
Fri 08/14Mostly Sunny81°F27°C

Whalers Village in Kaanapali

TodayPartly Cloudy72°F22°C
Mon 08/10Partly Cloudy75°F24°C
Tue 08/11Mostly Sunny76°F24°C
Wed 08/12Partly Cloudy76°F24°C
Thu 08/13Partly Cloudy77°F25°C
Fri 08/14Partly Cloudy76°F24°C

The Shops at Wailea in Wailea

TodayPartly Cloudy70°F21°C
Mon 08/10Partly Cloudy78°F26°C
Tue 08/11Mostly Sunny80°F27°C
Wed 08/12Partly Cloudy79°F26°C
Thu 08/13Mostly Sunny80°F27°C
Fri 08/14Mostly Sunny80°F27°C

Hawaii

Hilo, Hawaii

TodayShowers72°F22°C
Mon 08/10Scattered Showers76°F24°C
Tue 08/11Partly Cloudy76°F24°C
Wed 08/12Scattered Showers76°F24°C
Thu 08/13Showers76°F24°C
Fri 08/14Showers75°F24°C

Kailua/Kona

TodayMostly Clear67°F19°C
Mon 08/10Partly Cloudy74°F23°C
Tue 08/11Mostly Sunny73°F23°C
Wed 08/12Partly Cloudy74°F23°C
Thu 08/13Mostly Cloudy73°F23°C
Fri 08/14Mostly Cloudy73°F23°C

Puako

TodayMostly Clear67°F19°C
Mon 08/10Partly Cloudy74°F23°C
Tue 08/11Mostly Sunny73°F23°C
Wed 08/12Partly Cloudy74°F23°C
Thu 08/13Mostly Cloudy73°F23°C
Fri 08/14Mostly Cloudy73°F23°C

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Maps & Geography

Want to get the lay of the land? Explore maps and geographical features of The Hawaiian Islands here.

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