Best Time for a Hawaii Helicopter Tour: Weather, Time of Day & Season

The calendar below is for the Road to Hana helicopter and waterfall tour from Kahului on Maui, which includes a landing near a waterfall on private land. It holds 4.8/5 from 335 reviews on GetYourGuide (cancel up to 3 days in advance for a full refund). The calendar shows the dates, times and current prices you can actually book. Our page on the Hana rainforest flight explains what happens to its landing when cloud closes the Hana side. For the other islands, see our Kauai and Big Island guides.

Choosing your Hawaii dates

Choose your dates for Hawaii as a whole rather than for the helicopter tour alone. May through September is generally drier, while winter brings more rain but can also mean greener scenery and stronger waterfalls. The National Weather Service describes a drier summer from May to October, when the trade winds blow about 90% of the time, and a wetter winter from October to April, when cold fronts and kona storms bring heavier rain, so October sits between the two. Humpback whales are in Hawaiian waters from November to April.

Where you fly matters as much as when. Moist trade-wind air rises over the windward slopes and mountains, so they catch cloud and showers in every season, while the leeward coasts, where the air sinks, are often sunny and dry on the same day. Once your island and travel dates are fixed, the exact-day flying conditions matter more than the month.

Morning, midday or sunset

Over the mountains, cloud often builds during the day. The National Weather Service describes towering cumulus clouds building over the mountains and interiors on sunny afternoons, and the Western Regional Climate Center notes that the high mountain slopes tend to become cloudier during the middle part of the day. On mountain-heavy routes, such as Kauai’s Waiʻaleʻale crater or the West Maui mountains, a morning flight can have an advantage, and Air Maui and Rainbow Helicopters both recommend mornings. There is no universal best time across Hawaii, though: Blue Hawaiian says that most of the time it makes no difference whether you fly in the morning or the afternoon, and Jack Harter and Safari Helicopters say there is no right or wrong time of day. Some mornings start cloudy on the windward coasts and clear later, so on the day, the route and the forecast matter more than the hour.

Routes over the two national parks are the exception. Under the parks’ air tour rules, tour flights over Haleakalā National Park on Maui can run from 11 a.m. to 2 p.m. (to 4 p.m. in quieter aircraft), and not on Sundays or Wednesdays. Over Hawaiʻi Volcanoes National Park on the Big Island, standard aircraft can fly from 10 a.m. to 2 p.m., and quieter aircraft from 9 a.m. to 5 p.m.; there are no park flights on Sundays. On those routes the earliest flight of the day is not always available, so check the specific tour’s schedule; the date checker shows how much cloud is forecast over the mountains that afternoon.

Sunset flights are offered on some islands, often only on certain days or at certain times of year. On Oahu, Rainbow Helicopters runs a Waikiki sunset flight over the city and Diamond Head, and on the Big Island, Mauna Loa Helicopters offers a private sunset flight along the Kona coast. Sunset in Honolulu ranges from about 5:49 p.m. to 7:18 p.m. through the year. Operators ask you to check in typically 30 to 60 minutes before the flight, and the time you book is a check-in time, not a take-off time. For sunset, choose a check-in time well before the sun goes down.

Rain by month on each island

The table gives the average rainfall for each month at the five airports nearest the main heliports. It shows the seasonal pattern clearly, but the airports sit near sea level, and the mountains the flights cross are much wetter: the summit of Waiʻaleʻale on Kauai is one of the rainiest places on earth. Use it to compare months, not to predict the weather on your flight.

At Lihue, the wettest months are November to March, with December averaging 4.6 in of rain against 1.8 in in June. Kahului and Honolulu, on the drier sides of Maui and Oahu, get very little rain from May to September. Hilo and the windward Big Island are wet in every season, with rain on 10 to 19 days a month on average, so the summer–winter difference is less pronounced there than on Hawaii’s drier leeward coasts. Kona, on the sheltered west coast, is dry in every month. The totals are for the whole month, not a daily rate, so a wetter month usually means more showery days rather than rain all day.

What you see from the air through the year

November to April

This is the wetter half of the year. Waterfalls can be fuller after periods of rain, particularly on Kauai, Maui and the windward Big Island, but visibility over the mountains is less reliable. On Kauai the Hanalei River carries its highest average flows from November to April, peaking in March, and on the Big Island the Wailuku River, which feeds Rainbow Falls, broadly follows the same pattern, although single storms can fill it in any month. After a wet spell the ribbon falls on the valley walls of Kauai and West Maui run in dozens of strands. Kona storms, most common from November to March, can bring days of heavy rain and southerly winds, and snow sometimes dusts the summits of Mauna Kea, Mauna Loa and occasionally Haleakalā. Humpback whales are in Hawaiian waters from November to April, most of all from January to March. Aircraft have to stay at least 1,000 feet from them, so a sighting from a helicopter is a possible bonus, not something a tour can promise.

May to September, and October

The trade winds are at their most steady, showers over the mountains are lighter, and the leeward coasts are dry and sunny. Waterfalls run lower than in winter, although a heavy shower can fill them again within hours. October is a changeover month: Maui and the Kona coast are still dry, but Lihue on Kauai already averages more rain in October than in January. The Central Pacific hurricane season runs from June 1 to November 30; most storms pass far from the islands, but Hurricane Lowell hit Kauai in September 2026, so check the National Weather Service before you fly in these months. Days are longer, too, although any month has plenty of daylight for a flight: even in December the sun is up for about 11 hours.

Island by island

Kauai. Most circle-island flights head for Waiʻaleʻale, Waimea Canyon and the Nā Pali Coast. The crater sits near the summit of one of the wettest mountains in the world and is often in cloud, so a morning flight can help there, although Nā Pali faces west and gets its best light later in the day. More on routes and operators in our Kauai helicopter tours guide.

Maui. West Maui and Molokaʻi flights can go in the morning; Hana and Haleakalā routes that cross the national park fly in its permitted hours around midday, when cloud is more likely over the crater. See the Maui helicopter tours guide.

Oahu. The short Waikiki and Diamond Head flights are the least affected by mountain cloud, and Oahu has the islands’ sunset flights. Longer routes over the Koʻolau mountains follow the same morning-is-usually-clearer pattern as the other islands.

Big Island. Hilo flights to Kīlauea and the Hilo-side waterfalls fly in the park window when they cross the national park, and on the wet east side a clear morning is never guaranteed. From Kona, volcanic haze (vog) from Kīlauea often collects along the west coast when the volcano is active, which can soften the views. Lava is only visible during a fountaining episode, which cannot be planned for. See the Big Island helicopter tours guide.

What cancels a flight, and what to do about it

The decision to fly is made on the day by the pilot and the operator. Low cloud over the route, poor visibility, strong or gusty wind and heavy rain are what delay, reroute or cancel flights; none of the operators we checked publishes exact limits. Passing showers are common in every season and do not usually stop a flight on a doors-on tour, but a flight may be rerouted to a clearer part of the island, which can mean missing the view you came for.

Whatever month you visit, schedule the flight for the first days of your stay, so there is time to fly on another day if yours is cancelled for weather and seats are still available. What you get back after a weather cancellation depends on how you booked: some operators refund in full and others offer a new date, and a GetYourGuide booking follows GetYourGuide’s terms and the cancellation window on the listing.

How busy it gets

None of the operators we checked publishes how full its flights are month by month, so the closest measure is how many visitors arrive on each island. In 2025, the state tourism office counted about 890,000 visitors arriving by air in March and about 871,000 in July, the two busiest months, against about 675,000 in September, the quietest. On Kauai the range ran from about 142,000 visitors in July to about 102,000 in September; on Maui, from about 244,000 in December to about 179,000 in October.

Across the state, September, October and November had the fewest arrivals, with February and May close behind, while March, June, July and December were the busiest. These are visitor arrivals, not bookings, so they show when the islands are busiest rather than how hard it is to get a particular flight. Once your dates are fixed, book ahead if you want a particular tour or time of day.