The best times to visit Tonga for ideal weather are
June 25th to September 9th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Tonga Travel Guide
Other Tonga Travel Info
Weather in Tonga
Average temperatures in Tonga vary very little. Considering humidity, temperatures feel hot for most of the year with a chance of rain throughout most of the year. The area is far less temperate than some — in the 5th 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 Tonga, the hottest months are February, March, and then January. See average monthly temperatures below. The warmest time of year is generally early to mid March where highs are regularly around 86.7°F (30.4°C) with temperatures rarely dropping below 76°F (24.4°C) at night.
Tonga Temperatures (Fahrenheit)
Tonga 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.
Tonga Perceived Temperature (F)
Tonga Perceived Temperature (C)
Average Tonga 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 Tonga are July, September, and then August. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid July. For example, on the week of July 16th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in early to mid January with an average of 3 days of significant precipitation the week of January 8th.
When can you find snow in Tonga? 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 Tonga.
Snow on the Ground
The graph below shows the average snow on the ground in Tonga (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
Tonga has some extremely humid months, and high humidity throughout the year. The least humid month is August (74.8% relative humidity), and the most humid month is February (81.9%).
Wind in Tonga is usually calm. The windiest month is September, followed by August and December. September’s average wind speed of around 7.7 knots (8.8 MPH or 14.2 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late August to early September where average top sustained speeds reach 11.9 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Tonga.
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||6.5||Light breeze||10.5||Gentle breeze|
|Feb||5.7||Light breeze||9.8||Gentle breeze|
|Mar||5.7||Light breeze||9.7||Gentle breeze|
|Apr||5.9||Light breeze||9.3||Gentle breeze|
|May||6.4||Light breeze||9.9||Gentle breeze|
|Jun||6.8||Light breeze||10.2||Gentle breeze|
|Jul||6.7||Light breeze||10.1||Gentle breeze|
|Aug||7.4||Gentle breeze||10.6||Gentle breeze|
|Sep||7.7||Gentle breeze||11.1||Gentle breeze|
|Oct||7.1||Gentle breeze||10.5||Gentle breeze|
|Nov||6.3||Light breeze||10||Gentle breeze|
|Dec||7.2||Gentle breeze||10.4||Gentle breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Tonga?
Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for Tonga; 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 Aug 22, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Tonga is July, followed by June and September. 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 Tonga in March. 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 Tonga Travel Experience by Season
Fall (March through May)
Humidity and temperatures combine to make this season feel warm. Highs range from 86.6°F (30.3°C) and 83°F (28.3°C) with colder temperatures in the later months. Rain is somewhat common with 6 to 11 days of significant precipitation per month. Fall is the slowest for tourism, which makes it a good time for those looking for deals.
Winter (June through August)
The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the least precipitation with 4 to 5 days of precipitation per month. June – August is the busiest season for tourism in Tonga, so lodging and other accommodations may cost more than usual.
Spring (September through November)
Spring daily highs range from 84.6°F (29.2°C) and 81.3°F (27.4°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 5 to 9 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.
Summer (December through February)
Weather is perfect this time of year in Tonga to be enjoyable for warm weather travelers. The average high during this season is between 86.7°F (30.4°C) and 85°F (29.4°C). On average, it rains or snows a great amount: 8 to 12 times per month. These times of year are the second busiest with tourists.
Best Times to Travel › Tonga