Best time to visit Guam

Guam · Oceania

All twelve months scored on daily temperature, rainfall, humidity and holiday crowding.

The year in Guam

Tap a month for its page

Sweet spot
Good
OK
Avoid
Busy

Good for

Beach and sea Mar–Jun, Nov–Dec

Go in Feb, Apr or May — these months score within a whisker of each other; 31C max, 5 rainy days. Dec is the next best.

Dry season: Dec–May, 6 or fewer rainy days a month.

Plan this trip

Each site opens on its own search: choose your dates there. A few open on their home page, where you type the place too.

Links marked Ad pay us a commission if you book, at no extra cost to you; most pay nothing, and what a site pays never decides whether it is listed or where. How we rank

Flights

Choose where you fly from

Where to stay

Things to do

Car hire

Travel insurance

SafetyWing Ad

Mobile data (eSIM)

Each opens in a new tab, on the site's own pages.

Things to do in Guam

SMS Cormoran Russian-German armed merchantman
Point Udall Named after Mo Udall and regarded as the westernmost point of the United States
Mount Lamlam Mountain in Guam
Tokai Maru Japanese passenger-cargo ship built by the Mitsubishi Heavy Industries Shipyard
War in the Pacific National Historical Park Former battlefields, gun emplacements, trenches…
Dulce Nombre de Maria Cathedral Basilica Church in Guam, United States
Talofofo Falls Scenic Cascades in the Ugum River on Guam

Tours and tickets in Guam

Each site opens on its own search: choose your dates there. A few open on their home page, where you type the place too. Links marked Ad pay us a commission if you book, at no extra cost to you; most pay nothing, and what a site pays never decides whether it is listed or where. How we rank

Sights and their lines from Wikivoyage (Guam), licensed CC BY-SA 4.0, and Wikidata; in order of how often each one's Wikipedia article was read on phones in the last 12 months.

Month by month

No fare history for this route yet, so this ranking is climate and crowds only — the price column will fill in as the scanner collects.

Month	Max °C	Rain days	Humidity	Sun h/day	Verdict	Why
Jan	29°	6d	77%	10.3h	good	29C max, 6 rainy days
Feb	29°	5d	76%	10.5h	sweet spot	29C max, 5 rainy days
Mar	30°	5d	76%	10.8h	goodbusy	busier than usual
Apr	30°	5d	77%	11.2h	sweet spot	30C max, 5 rainy days
May	31°	5d	78%	11.8h	sweet spot	31C max, 5 rainy days
Jun	31°	9d	80%	11.3h	good	31C max, 9 rainy days
Jul	30°	16d	84%	9.8h	avoid	monsoon: 16 rainy days, 300mm
Aug	30°	21d	85%	8.8h	avoid	monsoon: 21 rainy days, 382mm
Sep	30°	21d	85%	8.6h	avoid	monsoon: 21 rainy days, 388mm
Oct	30°	19d	86%	8.4h	avoid	monsoon: 19 rainy days, 367mm
Nov	30°	8d	81%	10.1h	good	30C max, 8 rainy days
Dec	30°	6d	78%	10.3h	good	30C max, 6 rainy days

Rain days are the days with at least 1 mm of rain, as a weather station counts them.

Weather read at Tumon Bay: ten years of ERA5 and ERA5-Land reanalysis, through Open-Meteo's open data.

A busy month is a crowded one, not a bad one — usually it is crowded because the weather is good. It is flagged rather than scored down, and crowds alone never make a month “avoid”: that is reserved for weather worth skipping.

How busy it gets

Busiest in March.

Then and now

Guam's March days now average 29.6°C, 2.6°C warmer than in 1981–1990. 12 of 12 months are clearly warmer.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1981–90	26.9°	26.7°	26.9°	27.5°	28.0°	28.1°	28.1°	27.9°	28.0°	27.9°	27.9°	27.5°
2017–26	29.1°	29.2°	29.6°	30.1°	30.6°	30.6°	30.3°	30.0°	30.1°	29.7°	30.1°	29.7°
Change	+2.2°	+2.5°	+2.6°	+2.5°	+2.6°	+2.5°	+2.2°	+2.1°	+2.1°	+1.7°	+2.2°	+2.2°

The average daily high, month by month, for the nearest ERA5 grid cell. Bold is a clear change; grey is within the ordinary spread between years. Every destination, ranked.

Getting there

How far Guam is, and what it costs, depends on where you set off from — the months above do not.

Before you go

Currency	United states dollar
Languages	English, Chamorro
Plugs	Type A and B, 110 V
Driving	On the right
Calling code	+1671
Travel advice	No advice against travel — UK Foreign Office, updated 2026-08-18
Health	UK Foreign Office health advice

Facts from Wikidata (CC0), the UK Foreign Office (Open Government Licence) and the World Bank, refreshed 2026-10-08. The advisory is written for British travellers; entry rules depend on your passport.

Being there

On arrival

Paying — The currency is the US dollar. Credit cards are widely accepted at nearly all hotels, family restaurants and shopping centres; carry some cash for small purchases at markets and food stalls.
UPI, for visitors from India — Not accepted for paying here; bring a card that works abroad.

Getting around Guam

The airport is about two miles from Tumon Bay's hotels: most hotels run airport transfers, and a taxi counter outside the West arrivals building finds you the first available taxi. In Tumon, private shuttle trolleys stop at the hotels along Pale San Vitores Road; public buses also run, but they are slow and unreliable.

Apps — Rides: Stroll. Maps: Google Maps. Stroll, a local app, books cars at a price fixed when you order, paid only by card or phone wallet in the app. Taxis have meters: use a marked one and insist on the meter.

All the major U.S. car rental companies have offices at the Antonio B. Won Pat International Airport. Mainland gas station chains Shell, Mobil, and 76 are ubiquitous on the island. More on Wikivoyage

From the Wikivoyage article on Guam, written by travellers and licensed CC BY-SA 4.0.

Open in Google MapsGuam on the map

Help

Emergency — 911 (any emergency).
TravelCharika is not an emergency service: we cannot call for help or send anyone. Numbers can change; if one fails, ask someone local or your hotel.

Put together by hand from the sources listed, checked 8 October 2026. Apps, cards and rules change, so check before you rely on one.

Sources (10)

Guam in pictures

Guam Sunset — i

ryan harvey, CC BY-SA 2.0, via Wikimedia Commons

Woods at Guam No.1 — i

小野優太, CC BY-SA 4.0, via Wikimedia Commons

Guam National Guard disaster response to Typhoon Mawar in 2023 5 — i

The National Guard, CC BY 2.0, via Wikimedia Commons

Guam National Guard disaster response to Typhoon Mawar in 2023 2 — i

The National Guard, CC BY 2.0, via Wikimedia Commons

USS Tulsa (LCS 16) USS Charleston (LCS 18) Guam 27 April 2022 — i

Anonymous United States Navy photographer, Public domain, via Wikimedia Commons

What Guam is like

Guam (Chamorro: Guåhan) is an island in the western Pacific Ocean, about three-quarters of the way from Hawaii to the Philippines. An unincorporated territory of the United States of America, Guam gets most of its visitors from East Asia, especially Japan. More on Wikivoyage

Worth seeing: Tumon is the center of tourism on Guam. Attractions include beaches that are also wildlife reserves, a large aquarium, and various shows similar to the ones in Las Vegas. More on Wikivoyage
Worth doing: Diving in Guam – there are many shore and boat dive sites, mostly along the western coast of the island. The main dive shops catering to English speakers are MDA and Axe Murderer Tours. More on Wikivoyage
Getting in: The entry requirements for Guam are largely the same as those for the U.S, and nationals of all countries not needing a visa to enter the U.S. do not need a visa to enter Guam… More on Wikivoyage
Staying safe: For Emergencies Call 911. Observe caution when engaged in water activities on Guam, as in any coastal area, as currents can be swift and unpredictable, depending on the season. More on Wikivoyage
Staying healthy: The civilian Guam Memorial Hospital is located in Tamuning, in the Central Region, and serves as the island’s main public hospital. However, the hospital building sustained significant damage from Typhoon Mawar in 2023. More on Wikivoyage

From the Wikivoyage article on Guam, written by travellers and licensed CC BY-SA 4.0; the full article has far more. The numbers above are measured; this is experience.

Around Guam

Nearby

Kind of place

Guam is in Guam, Oceania. Distances are great-circle, so a short one can still be a long way round.

Links marked Ad pay us a commission if you book through one, at no extra cost to you. That does not affect the scores on this page, which are computed from climate and fare data before any link is built.