Island Seeker AI
I know every restaurant, hotel & tour on the island
Hi! I'm Island Seeker AI
Ask about restaurants, beaches, tours, hotels, or anything on the island.
Weather & Climate
Month-by-month breakdown, best season for beaches, and what to expect year-round
Verified 2026 · Island Seeker Editorial
quick answer
The best time to visit Guam is during the dry season, from December to June. This period offers the calmest seas, lowest rainfall, and ideal beach conditions. Temperatures are warm year-round (27–29°C / 80–84°F), so Guam is technically a good destination in any month — but July through November brings typhoon risk and heavier rain.
Year-round temperature
27–29°C (80–84°F)
Dry season
December – June (best for beaches)
Wet season
July – November (occasional typhoons)
Ocean temperature
~28°C year-round
Guam has a tropical marine climate, which means warm, humid weather year-round with little temperature variation between seasons. The average temperature stays between 27°C and 29°C (80–84°F) throughout the year, making it one of the most consistently warm destinations in the Pacific.
The main seasonal distinction is between the dry season (December–June) and the wet season (July–November). Humidity is high year-round at around 75–85%, but dry season days feel more comfortable, with refreshing trade winds and lower rainfall.
The dry season is Guam's peak tourist period and the best time for beach holidays. Rainfall is minimal — typically 50–75mm per month — and the northeast trade winds keep conditions pleasant. The ocean is calm with excellent visibility for snorkeling and diving.
January through March is the most popular period, attracting visitors from Japan and Korea during winter holidays and school breaks. Hotel rates are at their highest, and popular attractions can be busy. Booking accommodation and tours in advance is strongly recommended.
May and early June offer a sweet spot: dry season conditions with noticeably fewer tourists and lower prices before the summer rush from Asian markets begins.
The wet season brings heavy rainfall (150–250mm/month), higher humidity, and the risk of tropical storms and typhoons — particularly August through October. Most rain falls in intense short bursts rather than all-day drizzle, so outdoor activities are still often possible.
Typhoons occasionally affect Guam during this period. The island has strong building codes and emergency infrastructure in place, and most tourist facilities are well prepared. However, a direct typhoon hit will disrupt travel plans significantly. Check weather forecasts before and during travel during these months.
The upside: wet season prices are significantly lower. Hotel rates can drop 30–50% from peak, and attractions are far less crowded. Travellers on a flexible itinerary who don't mind occasional rain can find excellent value.
January & February: Best months overall. Cool, dry, calm seas. Busy with Japanese and Korean winter break visitors. Book early.
March & April: Excellent conditions continue. Spring break crowds from Asia. Temperatures start rising slightly.
May & June: Dry season ends in June. Great conditions, lower hotel prices, fewer tourists than January–April.
July & August: Wet season begins. Heavy rain, high humidity, typhoon watch period starts. Prices drop sharply. Still popular with Asian summer holiday visitors.
September & October: Peak typhoon risk. Best to purchase travel insurance. Prices at their lowest.
November: Typhoon season winds down. Weather improving. Good value window before December peak season begins.
December: Festive season begins. Dry and pleasant. Hotel prices rising. Holiday decorations throughout Tumon.
Light, breathable clothing is essential year-round. Guam is hot and humid regardless of season. Pack shorts, t-shirts, swimwear, and a light layer for air-conditioned restaurants and hotels.
Sun protection is critical — UV index in Guam is very high. Pack high-SPF sunscreen, a hat, and UV-protective swimwear, especially if spending time on the beach or snorkeling.
During the wet season, pack a compact waterproof jacket or poncho for sudden downpours. Mosquito repellent is useful for hiking or outdoor evening activities.
questions & answers
What is the best month to visit Guam?
January, February, and March are considered the best months to visit Guam. The weather is dry, the seas are calm, and the UV is slightly lower than summer months. These months are peak season, so book accommodation early.
Does Guam get a lot of rain?
Guam receives around 2,000–2,500mm of rain per year, but most falls during the wet season (July–November). During the dry season (December–June), rainfall is much lower. Even in the wet season, rain often falls in short bursts rather than all day.
When is typhoon season in Guam?
Typhoon season in Guam runs roughly from July to November, with peak risk in August, September, and October. Guam is well-prepared for typhoons with strong building codes, but a direct hit can significantly disrupt travel. Travel insurance is strongly recommended during this period.
What should I pack for a trip to Guam?
Pack light, breathable clothing, swimwear, high-SPF sunscreen, a hat, and insect repellent for outdoor activities. A light jacket or cardigan is useful for heavily air-conditioned indoor spaces. During the wet season, add a compact rain jacket.
Is it worth visiting Guam during the wet season?
Yes — the wet season (July–November) offers significant advantages for budget-conscious travellers. Hotel rates drop 30–50% from peak, attractions are far less crowded, and most activities are still accessible. Rain typically falls in intense short bursts rather than all-day drizzle, leaving many hours suitable for outdoor activities. The main risk is typhoons: purchase comprehensive travel insurance and monitor forecasts if travelling between August and October.
explore more