The best times to visit Oahu for ideal weather are
April 9th to July 1st
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Oahu Travel Guide
Other Oahu Travel Info
Weather in Oahu
Average temperatures in Oahu vary very little. Considering humidity, temperatures feel nice most of the year, excluding some hot weeks in the summer, with a fair chance of precipitation about half of the year. The area is more temperate than most — in the 61st percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Oahu, the hottest months are August, September, and then July. See average monthly temperatures below. The warmest time of year is generally early to mid August where highs are regularly around 83.9°F (28.8°C) with temperatures rarely dropping below 68.9°F (20.5°C) at night.
Oahu Temperatures (Fahrenheit)
Oahu Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
Oahu Perceived Temperature (F)
Oahu Perceived Temperature (C)
Average Oahu Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Oahu are July, August, and then June. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early July. For example, on the week of July 2nd there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early March with an average of 3 days of significant precipitation the week of March 5th.
When can you find snow in Oahu? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in Oahu.
Snow on the Ground
The graph below shows the average snow on the ground in Oahu (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Oahu has some very humid months, and above average humidity throughout the year. The least humid month is August (64.2% relative humidity), and the most humid month is December (75.2%).
Wind in Oahu is usually calm. The windiest month is June, followed by August and March. June’s average wind speed of around 6 knots (7 MPH or 11.2 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in mid June where average top sustained speeds reach 14.7 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Oahu.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
|Month||Avg. Wind||Avg. Wind Feel||Sustained High Wind||High Wind Feel|
|Jan||5.1||Light breeze||12||Significant breeze|
|Feb||5.5||Light breeze||12.6||Significant breeze|
|Mar||5.9||Light breeze||13.5||Significant breeze|
|Apr||5.5||Light breeze||13||Significant breeze|
|May||5.4||Light breeze||12.8||Significant breeze|
|Jun||6||Light breeze||13.8||Significant breeze|
|Jul||5.8||Light breeze||13.4||Significant breeze|
|Aug||5.9||Light breeze||13.8||Significant breeze|
|Sep||5.5||Light breeze||13.2||Significant breeze|
|Oct||5||Light breeze||12.3||Significant breeze|
|Nov||5.2||Light breeze||12.3||Significant breeze|
|Dec||4.9||Light breeze||12.1||Significant breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Oahu?
Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Sep 23, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Oahu, HI, US is July, followed by March and February. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Oahu in June. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall Oahu Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel warm. Highs range from 81.2°F (27.3°C) and 75.8°F (24.3°C) with warmer temperatures in the later months. Rain is somewhat common with 5 to 8 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the least precipitation with about 3 days of precipitation per month. June – August is fairly slow season for tourism in Oahu, so lodging and other accommodations may cost slightly less.
Fall (September through November)
Fall daily highs range from 83.9°F (28.8°C) and 78.3°F (25.7°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 4 to 6 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.
Winter (December through February)
Weather is perfect this time of year in Oahu to be enjoyable for warm weather travelers. The average high during this season is between 78.3°F (25.7°C) and 76°F (24.4°C). On average, it rains or snows a fair amount: 5 to 7 times per month. These times of year are the busiest with tourists.