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August is the height of Guam's typhoon season and the wettest month of the year. It's not recommended as a first choice for travel, but if prices are the primary concern or a flexible itinerary is possible, the island remains operational and beautiful between rain periods.
27–32°C (81–90°F)
Air temp
30°C (86°F)
Sea temp
Very High
Rainfall
Low
Crowds
why go
what's on
Assumption of Mary (Catholic feast day)
August 15Celebrated across Guam's Catholic community with church services and village gatherings.
travel tips
Purchase comprehensive travel insurance that covers typhoon disruption, including flight cancellations and early evacuation.
Book fully refundable or changeable hotel rates in case you need to cut the trip short.
Monitor NOAA Pacific Typhoon Center and Guam's emergency management website (gema.guam.gov) daily during August travel.
common questions
August carries the highest typhoon risk of any month in Guam. Most travel advisories suggest avoiding this period unless you have flexible plans and the right insurance. That said, not every August is disrupted — many visitors have uneventful trips in August. The risk is real, not guaranteed.
Even in wet season, Guam's indoor attractions work well: duty-free shopping, the Guam Museum, hotel resort amenities, spas, Japanese and Korean restaurants, and the aquarium at Tumon Bay. Most days have some sunny periods in the morning even in August.
Pack light tropical clothing plus a quality waterproof rain jacket — August rains are heavier and more prolonged than other months. Water-resistant footwear is essential. Keep important documents in a waterproof bag. Bring comprehensive travel insurance documents and have the contact number for your insurer accessible. Monitor weather via the NOAA Pacific Typhoon Center app. Book fully refundable hotel rates in case you need to cut the trip short.
August is statistically Guam's highest-risk month for typhoons. The island experiences a direct hit from a significant typhoon roughly once every several years — most years pass without serious impact. However, tropical storms, heavy rain, and rough seas that cancel water activities are common. Purchase comprehensive travel insurance covering trip cancellation, flight changes, and natural disaster evacuation before traveling in August.