Visiting Guam in September
September remains solidly in typhoon season with heavy rainfall and humid conditions. Like August, it offers the island's lowest prices and nearly empty tourist attractions. For flexible travelers with strong travel insurance, it can offer an extraordinary value experience.
27–32°C (81–90°F)
Air temp
30°C (86°F)
Sea temp
Very High
Rainfall
Low
Crowds
at a glance
Is September a good time to visit Guam?
Weather
Guam weather in September is rainier, with higher disruption risk for outdoor plans.
Crowds
September is one of Guam's quieter months with low tourist density.
Prices
This is usually one of the best-value months for Guam.
Booking Window
1–2 weeks ahead often works, but keep plans flexible for weather.
Best for travelers who...
- Budget-focused travelers hunting lower rates
- Return visitors comfortable with flexible itineraries
- Travelers prioritizing local atmosphere over perfect weather
Watch-outs in September
- Higher chance of rain-related cancellations for water activities
- Typhoon-season disruptions are possible in some weeks
- Travel insurance and refundable bookings are strongly recommended
why go
Why Visit in September
- Exceptional hotel value — some resorts offer deep discounts
- Zero crowds at beaches and attractions
- Post-Liberation festive atmosphere lingers in villages
- Warm water for swimming when weather permits
what's on
Events & Holidays in September
Labor Day (US)
First Monday of SeptemberObserved in Guam as a US territory.
travel tips
Travel Tips for September
September typhoon risk is slightly lower than August, but still significant — check seasonal forecasts before booking.
Many tour operators and outdoor activity providers have flexible cancellation policies in wet season — confirm before booking.
Early September (first 2 weeks) carries higher risk than late September, when the season begins to ease.
Recommended for Your September Trip
common questions
FAQ — Guam in September
Is late September better than early September in Guam?
Generally yes — typhoon frequency tends to decrease as September progresses toward October. If you must travel during this period, late September is marginally less risky, though the wet season officially continues through November.
What are the best deals on hotels in Guam?
August and September offer the absolute lowest hotel rates. Luxury beachfront resorts in Tumon that cost $300+/night in January can drop to $150–$180/night in September. The savings are significant, but weigh them against the weather risk.
What should I pack for Guam in September?
Pack light tropical clothing and a waterproof rain jacket — rain remains frequent and heavy in September. Quick-dry fabrics are essential. Water-resistant sandals or shoes handle the daily downpours well. Bring travel insurance documents and the NOAA Pacific Typhoon Center contact. A portable power bank is useful for staying connected to weather alerts during outdoor activities.
What activities can I do in Guam in September?
September is best suited to indoor and resort-based activities — duty-free shopping, spa days, resort pools, and the restaurant scene are all excellent. On sunny morning windows, beach visits and snorkelling are possible. Water tour operators often have flexible cancellation policies in wet season. The sea temperature in September is at its peak (30°C), making swimming and snorkelling very comfortable on calm days.
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