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Hawaii Weather in September, USA


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Hawaii Averages September

  • What is Average Temperature?
    The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month


  • What is Average High Low Temperature?
    The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily

    High Temperature

  • What is Average High Low Temperature?
    The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily

    Low Temperature

  • What is Average Sea Temperature?
    Average daily sea temperatures and divided by the number of days in the month. Sea Temperatures are taken from buoys, ships and even satellites can calculate sea temperature based on energy that is radiated from the sea's surface

    Sea Temperature

  • What are Average Daily Sunshine Hours?
    Total sunshine hours for the month, divided by the number of days in the month. Sunshine hours are taken with a sunshine recorder, either a Campbell-Stokes recorder or an Eppley Pyreheliometer

    Sunshine Hours

    10 hours
  • What is Average Rainfall?
    The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years

    Rainfall Days

    13 days
  • What is Average Rainfall?
    The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years


    61 mm

Hawaii Daily Averages September

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Avg Historical Daily Average

September Weather Averages

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Latest Hawaii Holiday Reviews

  • Family Holiday in Honolulu

    Weather was great. In 9 days we had a total of 10 minutes rain


  • Fantastique!

    Very warm, a bit difficult getting to sleep at night- but you soon adapt.


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What's the weather like in Hawaii in September

The weather in September in Hawaii is warm, sunny and very bright.

Though there may be more rain falling than in the previous month of August, September is still well within the peak summer months, offering a wonderful climate for visitors and locals alike.

And while September does reach the same average highs of 29°C as August, the increase in the Trade Winds during the month makes the heat a lot more bearable. This increase in air flow decreases humidity levels and improves the freshness on the island. And, in most cases, also reduces the chances of a hurricane within the archipelago even further.


There is a slight increase in the chance of rain in September, with a forecasted 61mm expected to fall over approximately 17 days. However much of this rain will fall in the night or at higher altitudes in the rain forests across Hawaii, ensuring the most popular resorts usually stay nice and dry.

Sunshine Hours and Temperature

On average, all the Hawaiian Islands will enjoy approximately 10 hours of daily sunshine throughout September with average temperatures reaching 27°C. Even at night when the climate is at its coolest, the thermometer will never usually fall below an average of 24°C, providing plenty of time to enjoy Hawaii after dark.

Sea Temperature

The sea retains its peak temperature throughout September offering calmer conditions across most of the islands and water levels that can reach an average of 27°C. This provides the perfect opportunity to enjoy swimming, snorkelling or a spot of diving depending on your preference.

While much of the northern hemisphere is preparing for another dreary autumn, September in Hawaii is usually wall to wall sunshine. And though the ninth month is still considered part of the hurricane season, the chances of having anything but good weather at this time of the year are very slim indeed.

Hawaii Hotels for September

Trump International Hotel Waikiki

For unadulterated luxury in Honolulu, book a stay at the Trump International Hotel Waikiki. As the name suggest, this hotel has the Trump inspired finishing touches which means high quality amenities, a very personable service and an attitude where nothing is too much trouble. The quality of the accommodation is solely dictated by the price you are willing to pay, with all range of luxuries for those that can find the budget. Even before you arrive, the online concierge ensures every element of the hotel will meet your expectations. And with the accommodation located within an easy walk of all the best facilities, it really is the perfect place to stay.

Pineapple Inn

Conversely, the wonderful Pineapple Inn on Maui is far more relaxed. Though within easy reach of Makena State Park and plenty of different restaurant options, even in September this resort is still very tranquil. The four rooms within the main inn all have their own personal entrance. Or there is a standalone cottage for complete serenity. Choose from an Ocean view or take in the Mountains of Maui. The pool area is absolutely gorgeous both day and night, while the fridge is regularly stocked with all types of goodies. Hikers, snorkelers, sun bathers and surf addicts all find a touch of paradise at the Pineapple Inn.

 The Bay Club

For a cost effective way to stay on the Big Island of Hawaii, book a condo at The Bay Club at the Waikoloa Beach Resort. This very popular resort offers large, airy accommodation that is maintained to the highest standard, yet still offers great value for money. For couples, families or lone travellers, the BBQ pits provide the perfect opportunity for some alfresco dining, or there are plenty of local restaurants and shopping options. The club is located between two championship golf courses. While the long walks and beautiful landscape provide a wonderful way to chill out. Tennis courts, two swimming pools, exercise facilities and whirlpool spas are also included within the facilities, to ensure everyone can have the time of their lives.

Hawaii Beaches in September

On the gentler south shore of Maui, Wailea Beach is always popular. In September, this sea can be almost glass flat some days, ensuring even people who don't like to snorkel can see through to the sand. Attached to the Hotel Wailea, this beach has now been rated one of the best in Maui and it's easy to see why. In the mornings, don't be surprised to see turtles enjoying the surf with you, or eating from the nearby coral beds. And in the evening, you can enjoy the most beautiful sunsets crowned by the view of Molokini in the background. For picture perfect beauty and long golden sand, Wailea Beach offers a little touch of paradise.

On the Big Island of Hawaii there aren't that many places where surfers can catch a good wave in September, but Ke'ei Beach should always deliver. With a 300 yard underwater reef the rides are long and consistent, offering the perfect spot for beginners and developers. Those underwater reefs do make it a little treacherous underfoot for swimmers, but it offers plenty of interest for snorkelers. Or you can just enjoy the view from the sand, which is a mixture of soft white and larva black grains. It's a great location for picnics, fishing or watching the sun go down. And with plenty of beautiful scenery, Ke'ei Beach is a wonderful place to be.

Bars and Restaurants

The Pig and the Lady

The Pig and the Lady is one of the most popular places to eat in the whole of Honolulu. Offering a combination of Vietnamese and Asian flavours, though the restaurant may not look spectacular from the outside, the food inside more than makes up for it. It is always crowded, with plenty of noise inside which means booking is always recommended in September, but for lunch, it is always worth dropping by. Choose the signature Pho French Dip Banh Mi for the ultimate taste sensation or ask the very helpful waiters for their suggestions. Just make sure you leave room for desert. Though sorbets served in a bacon fat dipped cone might not sound enticing, you won't know how good it is until you try.

 Tahiti Nui

When staying on Kauai, Tahiti Nui is a fantastic place to enjoy a good night. Made famous by its appearance in 'The Descendants' starring George Clooney, this place is funky, it's cool and the drinks are to die for. Mai Tai's are the speciality of the house, but there are plenty of cocktails and cool beers to choose from, with a well-stocked wine bar offering a variety of both local and international blends. The food in the restaurant is simply delicious, especially the Loco Moco. The combination of locals and visitors ensure Tahiti Nui is always busy and offers a lively place to spend time in Kauai.

Sly Mongoose

When the tourist trail in the heart of Maui gets all too much head to the Sly Mongoose which is well off the beaten track. Located on the mountain side of Honoapi'ilani Highway, this is the perfect place to sit, relax and have a good drink with the locals without the frenzy of the more popular dives. The bar is small and cosy, with a pool table for those that have the energy to stand. And with friendly hosts that are always up for a bit of banter, it's the perfect way to get away from it all. Though no food is served, the air conditioning is always welcome on the warmest September days. You simply can't go wrong at the Mongoose.

Things to do in Hawaii in September

Paradise Air

The best way to see Honolulu has to be from the air, and with Paradise Air you can enjoy an experience like no other. With this powered hand gliding experience, you and your pilot will use the natural thermals in the sky to create the most mind blowing experience of your life. And because the company have multiple trikes, you can ride alongside family or friends. When you are up in the skies, you can see some of the most spectacular sights over Oahu. You will even get the opportunity to try flying for yourself. Book early to avoid disappointment because this is an adventure no one should miss.

For a more stately form of activity in Hawaii, a spot of golf is always on offer. Across the archipelago there are hundreds of different courses for all abilities. Some of the world's top golfers have put their names to courses in Hawaii including Greg Norman, Arnold Palmer and, of course, Jack Nicklaus. Though popular, a round of golf is quite expense in Hawaii, so look out for special discounts and offers to get the best value for money. And for those that don't want to play, there is always the opportunity to just ride in the buggy, the views across the courses can be incredible.