Honolulu - Oahu Weather in September

Averages By Month

September in Honolulu is the start of the off season - prices go down and it’s less busy. But weatherwise it can hardly get any better. Daytime temperatures still remain in the high 80s F, the water remains beautifully warm with 81°F and most importantly the rainy season hasn’t started yet. Also, the days are still long with 9 hours of average sunshine and nights are still warm (around 72°F) .As it is still dry in September this does have an impact on the famous waterfalls of Honolulu, which in September do have less water flowing than in the rainy months. It is still the hurricane season in September - historically Honolulu has been very safe and hardly ever hit - but it’s certainly one thing to take into consideration.

If you don’t rely on the school holidays to travel, it’s a great time to visit Honolulu - Oahu now. The shoulder season starting in September has a lot of events to offer. Firstly, visiting sights such as the famous Waikiki Beach or the Diamond Head State Monument might be more comfortable with less visitors around. But then there are also a lot of festivals in September - one certainly not to miss if you are after some Hawaiian culture is the Aloha Festival.

High and Low Temperature in September °F

Water Temperature in September °F

Current Weather Honolulu-Oahu

71°F light rain
Local Time

Hourly 10 Days

Averages Honolulu - Oahu

  J F M A M J J A S O N D

High °F

81° 81° 82° 82° 82° 84° 89° 90° 89° 86° 84° 81°

Low °F

66° 66° 68° 68° 70° 72° 73° 73° 72° 72° 70° 66°


7h 7h 8h 9h 9h 9h 9h 9h 9h 8h 7h 7h

Rain Days

9 9 9 8 7 6 7 6 7 9 9 10

Water °F

75° 75° 75° 77° 79° 79° 81° 81° 81° 79° 79° 77°

Honolulu - Oahu Weather by Month

Best Time to visit Honolulu - Oahu

Given Honolulu’s tropic position on Oahu you will find it to be a vacation destination close to heaven on earth - it is never too hot and never too cold - all year round! The sun is out every single day and a beautiful breeze also helps it to never feel too hot. In summer temperatures hobble around in the 80s F and even in winter they rarely drop under the 70s F.
If you are looking for times with fewer visitors and lower prices check out the months from the second half of April to early June as well as the months from September until early December. In the peak season from late June to August it’s busier given the school holidays and drier season with less rain which visitors aim to enjoy. In the winter months from mid December until April, many surfers do visit to enjoy the stronger trade winds and visit the diverse surf events.

Things to know about Honolulu - Oahu

Honolulu is the capital of Hawaii and situated on the island of Oahu. Hawaii is made up of six islands (Oahu, Kauai, Maui, Hawaii, Molokai and Lanai) located in the Pacific Ocean. Honolulu is Hawaiian and basically means ‘sheltered bay’. Honolulu has a population of 390,000 and is the only real big city on any of the Hawaiian islands. Honolulu is an exciting place to be - there is lots going on from Chinatown to Waikiki Beach. If you are after a more relaxing and peaceful location for your vacation, other parts of the island of Oahu would be recommended.

Honolulu offers everything a big US city can - from skyscrapers and lots of traffic to art and culture. The big advantage is its location in the Pacific Ocean. You can spend half of the day on Waikiki Beach and then go exploring.

Honolulu Waikiki Beach
Honolulu ariel view

Some of the most exciting sights include:

Aloha Tower

This is a great place to start with as it will allow you to get a great view over Honolulu. Built in 1926, it used to be the highest tower in Honolulu - today it has been overtaken by many of the new skyscrapers. The best part is that a lift takes you up to the viewing platform for free!

Iolani Palace

This is the former residence of the Royal Family of Hawaii and one of the most important sights in Honolulu. Interestingly, it is the only royal palace on any US territory. The 3 tier palace in rococo finish was completed in 1882 and is now a museum. The real highlights of the place are the main hall, the throne room and the blue room.

Bernice Pauahi Bishop Museum

This is the most visited and simply most beautiful museum in Honolulu. Founded in 1889, the museum has the best collection of Hawaiian culture in the whole world. It hosts more than 24 million pieces. Highlights are the Planetarium, the Science Center and the big halls. Make sure to give yourself enough time when visiting!

Beretania Street

This is the street for you if you would like to explore some of the most historic buildings in Honolulu. These include the Washington Palace, the St. Andrews Cathedral and the State Capital.


Chinatown is worth a visit in many cities. In Honolulu it’s of particular interest as it is one of the oldest Chinatowns in the United States. It’s been a key part of Honolulu since the 1850s. It’s a vibrant place full of colour with many bars and clubs.

Kawaiahao Church

The Kawaiahao Church is also called Westminster Abbey of Hawaii. It is a simply stunning place made of 14000 pieces of coral stones. Well worth a visit!

Ala Moana Center

This is the shopping paradise of Honolulu!

Art in Honolulu

Art lovers should note that every first Friday of the month many galleries are open for free and stay open late. Some of the most important galleries include the Hawaii State Art Museum, The Honolulu Museum of Art and the Spalding House.

Lyon Arboretum

Is the most stunning botanical garden of the University of Hawaii!

Honolulu - Oahu Location

Other destinations in September

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