Which is the hottest month in Hawaii?

The hottest time of year in Honolulu, Oahu, Hawaii is normally September. Expect maximum daytime temperatures to reach 30°C with high heat and humidity.

Best time to visit Hawaii

Q: When is the best time to visit Hawaii?

The best time to visit Hawaii (Honolulu, Oahu) is May based on the following average weather conditions. Maximum daytime temperature = 22 - 30°C. Daily hours of sunshine = 10 hours or more.

Q: Which month has the most rain in Hawaii?

In terms of rainfall, December is usually the wettest month in Honolulu, Oahu, Hawaii with 82mm on average. There are normally 11 days in December with some rain.

Q: When is it sunniest in Hawaii?

The sunniest time of year in Honolulu, Oahu, Hawaii is normally September with bright sunshine on average for 74% of daylight hours; that's 9 hours of sunshine per day.

Q: When is the sea warmest in Hawaii?

The sea is usually at its warmest in Honolulu, Oahu, Hawaii in September when the water temperature reaches 27°C.

Find the best time to visit Hawaii and plan your perfect trip in 2025/2026. Get holiday inspiration, weather guides, travel advice and find great deals.

Hawaii by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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Top Hawaii destinations

Below are the temperatures expected today at popular countries, regions and places in Hawaii. Select a destination to compare today's forecast with average weather conditions.

All Hawaii destinations

When is the best time to visit Hawaii?

The best time to visit Hawaii (Honolulu, Oahu) is May based on the following average weather conditions.

Maximum daytime temperature = 72 - 86°F [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

4
Jan
4
Feb
4
Mar
4
Apr
4.5
May
4
Jun
4.5
Jul
4
Aug
4
Sep
4
Oct
4
Nov
4
Dec

Change criteria

Max Day Temperature (°F)

79
Jan
79
Feb
79
Mar
81
Apr
82
May
84
Jun
84
Jul
86
Aug
86
Sep
84
Oct
82
Nov
79
Dec

Hours of Sunshine (daily)

7
Jan
7
Feb
8
Mar
8
Apr
9
May
9
Jun
10
Jul
9
Aug
9
Sep
8
Oct
7
Nov
6
Dec

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

The weather guide for Hawaii (Honolulu, Oahu) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

Metric (°C) | Imperial (°F)

Hawaii weather overview

These mountainous islands, America's 50th state, lie in the centre of the Pacific Ocean, five hours' flying time from mainland United States. Their tropical oceanic climate, tempered by trade winds, has combined with spectacular scenery and colourful traditions to create phenomenal growth in tourism over the past three decades.

The south and west coasts of the islands - where most holiday resorts are located - receive a lot of sunshine tempered by sporadic rain throughout the year. There is a rainy season from December to March though, ironically, the tourism high season, when the scenery is at its most lush and long, hot days break up the rainy spells.

On the islands' mountainous northeast coasts it's a different story: these are exposed to the full force of the Pacific trade winds and experience much heavier rainfall.

The mountains of Kauai house one of the wettest places on earth. Cyclones can hit the islands from May to November but these are comparatively rare. Temperatures are high throughout the year but never excessive, as humidity levels are manageable.

What to pack for Hawaii weather

Pack light clothes with cover-ups for the winter months.

More about Hawaii

Explore our complete guide to Hawaii with the latest travel advice for travellers and holidaymakers including official updates and local travel tips for Hawaii.

Essential travel guide
Travel guidance
Travel health
Travel features
Top travel deals
FAQs

Hawaii travel guide - essential info

Below is a beginner's guide to Hawaii with essential travel facts such as dominant language spoken, typical flight time from the UK and the local currency. You can also check whether visas are required and what plug adapter you need to pack.

Hawaii - quick facts
Flight time^✝	18 hours
Time difference	UK -10 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes

Why visit Hawaii?

Considering a holiday to the Hawaii? Here are some of the very good reasons it makes such a wonderful holiday destination be it for beaches or nature to ensure you get the most out of your 2025/2026 escape.

Beaches
Nature
Nightlife

Hawaii tourist information

Hawaii Tourism Authority

✝ = Typical flight time from the UK and visa requirements for UK travellers.

Travelling to Hawaii?
Hotels Flights eSIMs Travel insurance

Hawaii travel guidance

Check the latest travel guidance and advice on visiting Hawaii from official government sources (in english) from around the world including entry requirements and travel restrictions.

UK traveller advice for the Hawaii - UK FCDO
Irish traveller advice for the Hawaii - Department of Foreign Affairs, Ireland
Canadian travel advice for the Hawaii - Government of Canada
Safe travel advisories for the Hawaii - Ministry of Foreign Affairs, New Zealand
Smarter traveller advice for the Hawaii - Department of Foreign Affairs, Australia

Learn more about the current safety and security risks from terrorism, natural disasters and more. Read about the local laws and customs to consider when travelling around Hawaii.

Note: UK FCDO - UK Foreign, Commonwealth & Development Office

Hawaii travel health

Find out more about staying safe when travelling to Hawaii with the latest guidance on required vaccinations and recommended medication to take with you.

Vaccines & medicines for the Hawaii - CDC
Health & vaccinations for the Hawaii - TravelHealthPro, NaTHNac
How to stay safe & healthy in the Hawaii - Fit for Travel, Public Health Scotland

Check out the general travel tips for staying safe and healthy in Hawaii, risks of preventable diseases and what to pack.

Note: CDC - Centers for Disease Control and Prevention

Hawaii travel features

Do you want to learn more about Hawaii? Read our latest features covering travel tips and insider destination guides on where to go and what to do in Hawaii.

8 things to do in Oahu, Hawaii

Hawaii FAQs

Read our frequently asked questions about travelling to Hawaii including the current entry restrictions, driving side, electrical plugs used and much more.

Which month has the most rain in Hawaii?

In terms of rainfall, January is usually the wettest month in Honolulu, Oahu, Hawaii with 0.0 inches on average. There are normally no days in January with some rain.

When is it sunniest in Hawaii?

The sunniest time of year in Honolulu, Oahu, Hawaii is normally January with bright sunshine on average for 0% of daylight hours; that's 0 hours of sunshine per day.

When is the sea warmest in Hawaii?

The sea is usually at its warmest in Honolulu, Oahu, Hawaii in January when the water temperature reaches 32°F.

What is the flight time to Hawaii from the UK?

The flight time to Hawaii from the UK is typically 18 hours.

What is the time difference between Hawaii and the UK?

The time difference between Hawaii and the UK is UK time-10 hours.

What is the main language spoken in Hawaii?

The main language spoken in Hawaii is English.

Learn a language for Hawaii with Rosetta Stone^*, Busuu^* and Rocket Languages^*.

What is the currency in Hawaii?

The currency in Hawaii is the US Dollar (USD).

Send money to Hawaii with TransferGo^*.

Which plugs are used in Hawaii?

Hawaii uses electrical plug type A + B (120 Volts).

Which side of the road do they drive on in Hawaii?

They drive on the right side of the road in Hawaii.

Find out more about driving in USA with International Drivers Association^*.

Do you need a visa for Hawaii?

Yes, UK passport holders do need a visa to enter Hawaii.

Check USA visa requirements for all passport holders with VisaHQ^*.

Hawaii travel deals

Holidays to Hawaii

Check out the latest deals, discount codes and special offers on holidays to Hawaii in 2025/2026. Pay low deposits and save with last minute holiday availability and free kids places.