gowhereandwhen.comGo in the dry season, January to April, for reliable sun and the calmest reef conditions on Tumon Bay. July to November is the wet season and the heart of typhoon season, and Guam does take direct hits.
A 0 to 100 comfort rating from daytime heat, overnight chill, rainfall and storm risk, for Hagatna. Higher is better. Some booking links earn us a commission, at no extra cost to you.
The steadiest weather, peaking around Mar.
Other months to compare; prices and crowds depend on your destination and dates.
Typhoon season.
The year at a glance
Guam is America in the western Pacific: a US territory with big resort beaches on Tumon Bay, Chamorro villages and fiestas in the south, and a dense layer of WWII history. It is warm year round, split between a dry trade-wind season and a wet, stormy one. We rate on Tumon, the resort strip.
January to April is the pick: rainfall drops as low as 55 mm in March, humidity eases and the reef flats stay calm. From July the rain builds fast, peaking August to October at 300 to 350 mm a month, exactly when typhoon risk is highest. Hotels are engineered for storms, but that half of the year needs flexible plans.
Guam month by month
Highs, lows, rainfall and the rating, for Hagatna.
JanuaryHot with a little rain.Ideal 75
- Daytime high
- 30°C / 86°F
- Overnight low
- 24°C / 75°F
- Rainfall
- 105 mm
Hot with a little rain.
FebruaryHot with a little rainIdeal 86
- Daytime high
- 30°C / 86°F
- Overnight low
- 24°C / 75°F
- Rainfall
- 75 mm
Hot with a little rain.
MarchHot with a little rainIdeal 93
- Daytime high
- 30°C / 86°F
- Overnight low
- 24°C / 75°F
- Rainfall
- 55 mm
Hot with a little rain.
AprilHot with a little rainIdeal 88
- Daytime high
- 31°C / 88°F
- Overnight low
- 25°C / 77°F
- Rainfall
- 70 mm
Hot with a little rain.
MayHot with a little rain.Ideal 76
- Daytime high
- 31°C / 88°F
- Overnight low
- 25°C / 77°F
- Rainfall
- 100 mm
Hot with a little rain.
JuneHot and wet.Good 55
- Daytime high
- 31°C / 88°F
- Overnight low
- 25°C / 77°F
- Rainfall
- 155 mm
Hot and wet.
JulyHot and very wet, monsoon rains.Fair 43
- Daytime high
- 30°C / 86°F
- Overnight low
- 25°C / 77°F
- Rainfall
- 250 mm
Hot and very wet, monsoon rains.
AugustHot and very wet, storm season.Avoid 6
- Daytime high
- 30°C / 86°F
- Overnight low
- 24°C / 75°F
- Rainfall
- 350 mm
Hot and very wet, storm season.
SeptemberHot and very wet, storm season.Avoid 8
- Daytime high
- 30°C / 86°F
- Overnight low
- 24°C / 75°F
- Rainfall
- 340 mm
Hot and very wet, storm season.
OctoberHot and very wet, storm season.Avoid 13
- Daytime high
- 30°C / 86°F
- Overnight low
- 24°C / 75°F
- Rainfall
- 300 mm
Hot and very wet, storm season.
NovemberHot and very wet, storm season.Avoid 25
- Daytime high
- 30°C / 86°F
- Overnight low
- 25°C / 77°F
- Rainfall
- 220 mm
Hot and very wet, storm season.
DecemberHot and wet.Great 61
- Daytime high
- 30°C / 86°F
- Overnight low
- 24°C / 75°F
- Rainfall
- 140 mm
Hot and wet.
Where you go changes when you go
Tumon Bay and Hagatna
The resort strip and the little capital: beaches, shopping and Two Lovers Point. Driest January to April.
The south
Chamorro villages, Umatac Bay and waterfall hikes, greenest after the rains and most walkable in the dry season.
War in the Pacific sites
Landing beaches, gun emplacements and the national historical park, open year round.
Best time to visit Guam for
Beaches and resorts
January to April, for the surest sun on Tumon Bay's protected lagoon.
Diving and snorkelling
The dry season for calm, clear water, including the Blue Hole and double-war wrecks of Apra Harbor.
Village fiestas
Year round: southern villages rotate patron-saint fiestas, and visitors are genuinely welcome.
Best value
The wet season, with resort deals balancing the daily showers and storm-watch caveats.
What is on, and when
Dry season, Jan to Apr
Trade winds, low rain and the calmest lagoon of the year.
Liberation Day, 21 Jul
Guam's biggest celebration: a month of fiestas ending in the Hagatna parade.
Watch out
Typhoon season
Aug to Nov.
Rainy season
Jun to Dec.
Where to stay in Guam
Compare places to stay around Tumon. Choose your dates on the booking site.
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Before you choose a stay
- Check the exact location and transport connections.
- Compare the full price, including taxes and fees.
- Read cancellation terms before you book.
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Good to know
What is the best time to visit Guam?
When is typhoon season in Guam?
Do I need a US visa for Guam?
Plan another month or destination
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