✓ Updated August 2026
Weather data and travel information verified current
Best Time to Visit Guam, USA: Sep or Oct 2026

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Discover tours, activities, and experiences in Guam, USA
Quick Answer:
For a truly delightful Guam experience, aim for the dry season, roughly from December through May. During these months, you'll bask in abundant sunshine, perfect for exploring the island's charming beaches and vibrant coral reefs without the interruption of heavy rains. Imagine waking to the gentle sea breeze and spending your days enjoying warm, pleasant temperatures that invite leisurely strolls through local markets and breathtaking golden sunsets over the Pacific. The winter months offer a particularly inviting escape from colder climates, while the transition into late spring still provides fantastic conditions for adventure and relaxation.
Best Months to Visit:
Airport Code
GUM
Coordinates
36.90°, -89.82°
Climate Overview
Guam, a tropical paradise in the Western Pacific, offers a year-round embrace of warmth and humidity, punctuated by distinct wet and dry seasons. Imagine stepping into a gentle, consistent warmth, where the air is thick with the scent of plumeria and the distant sound of waves. From December to May, the dry season blesses the island with abundant sunshine, perfect for exploring ancient latte stones under a clear blue sky or diving into vibrant coral reefs. As the calendar turns, the wet season arrives from June to November, bringing refreshing, often brief, afternoon downpours that make the lush jungle canopy even more vibrant and the air feel alive. These showers are a natural rhythm, often followed by brilliant rainbows and a renewed sense of freshness, ideal for enjoying the island's rich cultural festivals that thrive under this generous climate.
Best months at a glance: Sep, Oct
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Weather, best months, things to do, and travel tips
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Top Things to Do
Sunrise Over Two Lovers Point
Witness the sun paint the sky in fiery hues from this legendary cliffside viewpoint, a place steeped in Chamorro folklore. Arrive before dawn to claim a prime spot and feel the gentle sea breeze as the island awakens; the dramatic cliffs plunging into the turquoise Pacific are a sight to behold.
Snorkeling the Pristine Waters of Piti Bay
Escape the crowds and discover vibrant coral gardens teeming with marine life in this protected marine preserve. Rent a kayak or paddleboard and glide over the calm, clear waters, keeping an eye out for sea turtles and colorful reef fish; consider a guided tour for deeper insights into the ecosystem.
A Taste of Guam at a Local Chamorro Village
Immerse yourself in the heart of Chamorro culture by visiting a local village, where you can savor authentic dishes like kelaguen and red rice. Engage with artisans, learn about traditional crafts, and experience the warm hospitality that defines Guam; look for weekend fiestas for the most vibrant atmosphere.
Exploring the Latte Stone Park
Step back in time at the Latte Stone Park, home to ancient stone pillars that were once the foundation for traditional Chamorro homes. Wander among these impressive monoliths, imagining the lives of the island's earliest inhabitants, and visit the nearby museum for historical context.
💡 Travel Tip: For the best value on hotels during this season, check current rates on Trip.com.
Essential Travel Tips
While credit cards are widely accepted, always have some cash on hand for smaller vendors, local markets like the Chamorro Village night market, and tips. ATMs are readily available, but it's good to have smaller denominations for spontaneous purchases.
Renting a car is highly recommended for exploring Guam at your own pace, especially if you want to visit more remote beaches and historical sites. Public transport is limited, and taxis can be expensive for longer distances. Book your rental in advance, especially during peak season.
Embrace the 'Håfa Adai' spirit! This Chamorro greeting means 'hello' and is more than just a word; it's a way of life. A simple 'Håfa Adai' when you meet someone, whether a hotel staff member or a local shopkeeper, goes a long way in showing respect and opening doors to genuine interactions.
Don't leave Guam without trying kelaguen! It's a local delicacy made with finely chopped cooked meat (chicken, shrimp, or fish) mixed with lemon juice, coconut, onions, and hot peppers. You'll find it at most local eateries and it's a must-try alongside red rice.
Guam is generally very safe, but like anywhere, it's wise to be aware of your surroundings. Keep valuables secure, especially at crowded tourist spots or beaches, and avoid leaving them unattended. The biggest 'danger' is probably sunburn, so pack plenty of reef-safe sunscreen!
Pack light, breathable clothing – think shorts, t-shirts, sundresses. The humidity is high year-round, so quick-drying fabrics are your friend. Don't forget a swimsuit, a hat, sunglasses, and comfortable walking shoes for exploring historical sites like Fort Nuestra Señora de la Soledad.
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Find Your Best Month to Visit Guam
Pick what matters most to you and we'll rank every month of the year using Guam's actual weather data.
- #1SepBest match🌡️ 82°F high🌧️ 7 rainy days🌅 12.4h daylight
- #2Jun🌡️ 87°F high🌧️ 9 rainy days🌅 14.6h daylight
- #3Aug🌡️ 87°F high🌧️ 9 rainy days🌅 13.5h daylight
- #4Oct🌡️ 70°F high🌧️ 9 rainy days🌅 11.2h daylight
- #5Jul🌡️ 89°F high🌧️ 12 rainy days🌅 14.4h daylight
- #6Nov🌡️ 57°F high🌧️ 9 rainy days🌅 10.2h daylight
- #7Apr🌡️ 69°F high🌧️ 11 rainy days🌅 13.2h daylight
- #8Dec🌡️ 49°F high🌧️ 9 rainy days🌅 9.7h daylight
- #9May🌡️ 78°F high🌧️ 13 rainy days🌅 14.2h daylight
- #10Jan🌡️ 45°F high🌧️ 9 rainy days🌅 10h daylight
- #11Feb🌡️ 48°F high🌧️ 10 rainy days🌅 10.9h daylight
- #12Mar🌡️ 59°F high🌧️ 13 rainy days🌅 12h daylight
Weather Details
Monthly Weather Data Table
| Month | High (°C) | Low (°C) | High (°F) | Low (°F) | Rainfall (mm) | Rain Days | Daylight (h) |
|---|---|---|---|---|---|---|---|
| Jan | 7°C | -2°C | 45°F | 29°F | 94mm | 9 days | 10.0h |
| Feb | 9°C | -1°C | 48°F | 31°F | 109mm | 10 days | 10.9h |
| Mar | 15°C | 5°C | 59°F | 41°F | 139mm | 13 days | 12.0h |
| Apr | 20°C | 10°C | 69°F | 50°F | 158mm | 11 days | 13.2h |
| May | 25°C | 16°C | 78°F | 60°F | 131mm | 13 days | 14.2h |
| Jun | 30°C | 21°C | 87°F | 69°F | 83mm | 9 days | 14.6h |
| Jul | 32°C | 23°C | 89°F | 73°F | 85mm | 12 days | 14.4h |
| Aug | 31°C | 22°C | 87°F | 71°F | 89mm | 9 days | 13.5h |
| Sep | 28°C | 18°C | 82°F | 65°F | 64mm | 7 days | 12.4h |
| Oct | 21°C | 12°C | 70°F | 53°F | 97mm | 9 days | 11.2h |
| Nov | 14°C | 5°C | 57°F | 40°F | 92mm | 9 days | 10.2h |
| Dec | 10°C | 1°C | 49°F | 34°F | 103mm | 9 days | 9.7h |
Guam, USA Month by Month: Complete Guide
Planning your trip to Guam, USA? Here's what to expect each month:
Jan in Guam, USA
Weather
7°C°C / 45°F°F
9 days rainy days • 94mmmm
What to Expect
Cold, with highs around 7°C. Warm clothing and layers are essential. Occasional showers are likely, so a light rain jacket is handy. It's the coolest month of the year here.
Crowd Level
🟢 Low - Quiet season, easy to find accommodation
Feb in Guam, USA
Weather
9°C°C / 48°F°F
10 days rainy days • 109mmmm
What to Expect
Cold, with highs around 9°C. Warm clothing and layers are essential. Occasional showers are likely, so a light rain jacket is handy. Highs run about 23°C below Jul, the year's warmest month.
Crowd Level
🟢 Low - Quiet season, easy to find accommodation
Mar in Guam, USA
Weather
15°C°C / 59°F°F
13 days rainy days • 139mmmm
What to Expect
Cool, with highs near 15°C. Pack layers and a light jacket for daytime comfort. Occasional showers are likely, so a light rain jacket is handy. Highs run about 17°C below Jul, the year's warmest month.
Crowd Level
🟢 Low - Quiet season, easy to find accommodation
Apr in Guam, USA
Weather
20°C°C / 69°F°F
11 days rainy days • 158mmmm
What to Expect
Mild and comfortable, around 20°C. Pleasant conditions for sightseeing and walking. Expect frequent rain this month — bring waterproof gear. Highs run about 12°C below Jul, the year's warmest month. It also brings the most rain of any month here.
Crowd Level
🟡 Moderate - Comfortable crowds, good availability
May in Guam, USA
Weather
25°C°C / 78°F°F
13 days rainy days • 131mmmm
What to Expect
Warm and summery, with highs near 25°C — great for beaches and outdoor activities. Occasional showers are likely, so a light rain jacket is handy. Highs run about 7°C below Jul, the year's warmest month.
Crowd Level
🟡 Moderate - Comfortable crowds, good availability
Jun in Guam, USA
Weather
30°C°C / 87°F°F
9 days rainy days • 83mmmm
What to Expect
Warm and summery, with highs near 30°C — great for beaches and outdoor activities. Occasional showers are likely, so a light rain jacket is handy. Highs run about 2°C below Jul, the year's warmest month.
Crowd Level
🔴 High - Peak tourist season, book early
Jul in Guam, USA
Weather
32°C°C / 89°F°F
12 days rainy days • 85mmmm
What to Expect
Hot, with daytime highs around 32°C. Plan indoor breaks during midday and stay hydrated. Occasional showers are likely, so a light rain jacket is handy. It's the warmest month of the year here.
Crowd Level
🔴 High - Peak tourist season, book early
Aug in Guam, USA
Weather
31°C°C / 87°F°F
9 days rainy days • 89mmmm
What to Expect
Warm and summery, with highs near 31°C — great for beaches and outdoor activities. Occasional showers are likely, so a light rain jacket is handy.
Crowd Level
🔴 High - Peak tourist season, book early
Sep in Guam, USA
⭐ Best TimeWeather
28°C°C / 82°F°F
7 days rainy days • 64mmmm
What to Expect
Warm and summery, with highs near 28°C — great for beaches and outdoor activities. Occasional showers are likely, so a light rain jacket is handy. Highs run about 4°C below Jul, the year's warmest month. It's the driest month of the year here.
Crowd Level
🟡 Moderate - Comfortable crowds, good availability
Oct in Guam, USA
⭐ Best TimeWeather
21°C°C / 70°F°F
9 days rainy days • 97mmmm
What to Expect
Mild and comfortable, around 21°C. Pleasant conditions for sightseeing and walking. Occasional showers are likely, so a light rain jacket is handy. Highs run about 11°C below Jul, the year's warmest month.
Crowd Level
🟡 Moderate - Comfortable crowds, good availability
Nov in Guam, USA
Weather
14°C°C / 57°F°F
9 days rainy days • 92mmmm
What to Expect
Cool, with highs near 14°C. Pack layers and a light jacket for daytime comfort. Occasional showers are likely, so a light rain jacket is handy. Highs run about 18°C below Jul, the year's warmest month.
Crowd Level
🟢 Low - Quiet season, easy to find accommodation
Dec in Guam, USA
Weather
10°C°C / 49°F°F
9 days rainy days • 103mmmm
What to Expect
Cool, with highs near 10°C. Pack layers and a light jacket for daytime comfort. Occasional showers are likely, so a light rain jacket is handy. Highs run about 22°C below Jul, the year's warmest month.
Crowd Level
🔴 High - Peak tourist season, book early
All Things to Do in Guam, USA
Sunrise Over Two Lovers Point
natureWitness the sun paint the sky in fiery hues from this legendary cliffside viewpoint, a place steeped in Chamorro folklore. Arrive before dawn to claim a prime spot and feel the gentle sea breeze as the island awakens; the dramatic cliffs plunging into the turquoise Pacific are a sight to behold.
Best time: Nov-May
Snorkeling the Pristine Waters of Piti Bay
activityEscape the crowds and discover vibrant coral gardens teeming with marine life in this protected marine preserve. Rent a kayak or paddleboard and glide over the calm, clear waters, keeping an eye out for sea turtles and colorful reef fish; consider a guided tour for deeper insights into the ecosystem.
Best time: Nov-May
A Taste of Guam at a Local Chamorro Village
foodImmerse yourself in the heart of Chamorro culture by visiting a local village, where you can savor authentic dishes like kelaguen and red rice. Engage with artisans, learn about traditional crafts, and experience the warm hospitality that defines Guam; look for weekend fiestas for the most vibrant atmosphere.
Best time: Year-round
Exploring the Latte Stone Park
culturalStep back in time at the Latte Stone Park, home to ancient stone pillars that were once the foundation for traditional Chamorro homes. Wander among these impressive monoliths, imagining the lives of the island's earliest inhabitants, and visit the nearby museum for historical context.
Best time: Year-round
Hiking to the Hidden Waterfalls of Tarzan Falls
natureVenture inland on a moderately challenging hike through lush jungle to discover the refreshing cascades of Tarzan Falls. The cool, clear pools at the base are perfect for a revitalizing dip after your trek; wear sturdy shoes and bring insect repellent for the best experience.
Best time: Jun-Oct
Shopping for Unique Souvenirs in Hagåtña
shoppingDiscover handcrafted treasures and local artwork in the charming shops and markets of Guam's capital, Hagåtña. Look for intricate shell jewelry, woven baskets, and locally made soaps; the Guam Visitors Bureau often has information on local artisan markets.
Best time: Year-round
Sunset Cocktails with Ocean Views
nightlifeUnwind with a tropical cocktail at one of the beachfront bars as the sun dips below the horizon, casting a warm glow over the Pacific. Many resorts offer stunning sunset views, but seek out local spots in Tumon or Asan for a more laid-back, authentic vibe.
Best time: Year-round
Exploring the Underwater World at Apra Harbor
activityDive or snorkel among the fascinating shipwrecks and diverse marine life within the protected waters of Apra Harbor. This unique aquatic playground offers a glimpse into Guam's maritime history and a chance to see a variety of reef fish and coral formations.
Best time: Nov-May
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Getting Around Guam, USA
Rental Cars
The most flexible way to explore Guam, especially if you plan to venture beyond Tumon. Having your own wheels allows you to access secluded beaches, historical sites, and local eateries at your own pace.
Public Buses (Guam Regional Transit Authority - GRTA)
GRTA offers a network of bus routes connecting major villages and tourist areas. It's a budget-friendly option for getting around, though schedules can be less frequent than in larger cities.
Taxis
Taxis are readily available in tourist hubs like Tumon and at the airport. They are convenient for direct trips, especially if you have luggage or are traveling late at night when other options are limited.
Ride-Sharing Services (e.g., Uber/Lyft - limited availability)
While not as ubiquitous as in mainland US cities, ride-sharing services do operate on Guam. They can offer a convenient and often slightly cheaper alternative to taxis, especially for shorter distances.
Hotel Shuttles
Many hotels, particularly in the Tumon area, offer complimentary shuttle services to popular attractions, shopping centers, and beaches. This is a convenient way to get around without worrying about parking or navigation.
Walking/Biking (within Tumon)
The Tumon area is quite walkable and bike-friendly, with sidewalks and dedicated paths in many sections. It's a pleasant way to explore the resorts, shops, and restaurants along the coast.
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Frequently Asked Questions
When's the absolute best time to visit Guam if I want to avoid the rain and enjoy the most sunshine?
For guaranteed sunshine and minimal rain, aim for the dry season, which typically runs from December to May. This is when the island is at its most vibrant for beach activities and exploring. While the wet season (June to November) can bring refreshing showers, it also means higher humidity and a greater chance of typhoons, so the dry months are your safest bet for uninterrupted outdoor fun.
Beyond the popular beaches, what's a truly unique cultural experience I shouldn't miss in Guam?
You absolutely must visit the Latte Stone Park in Hagåtña. These ancient pillars are remnants of the Chamorro civilization and offer a fascinating glimpse into Guam's pre-colonial history. It's a quiet, contemplative spot that really connects you to the island's deep roots, far from the usual tourist hustle.
Getting around Guam seems a bit tricky. What's the best way to explore beyond Tumon?
While renting a car offers the most freedom, especially if you want to explore the southern parts of the island, the local bus system (Guam Mass Transit) is surprisingly efficient for getting between major villages like Tumon, Dededo, and Hagåtña. For a more authentic experience, consider hiring a local taxi for a day trip to explore more remote areas; just agree on the rate beforehand.
I've heard about the Chamorro culture. Are there any specific customs I should be aware of to be respectful?
The Chamorro people are incredibly warm and welcoming, but showing respect for elders is paramount. When visiting someone's home, it's customary to remove your shoes before entering. Also, don't be surprised if you're offered food or drink; accepting is a sign of politeness and appreciation for their hospitality.
Are there any 'hidden gem' snorkeling spots that rival the popular ones?
While Piti Bay and Two Lovers' Point are well-known, I highly recommend checking out the waters off the coast of Talofofo or Umatac. These southern bays often have clearer water and a more untouched coral ecosystem, meaning you'll likely see more diverse marine life with fewer crowds. Just be sure to check local conditions and tides before heading out.
What's the deal with currency and tipping in Guam?
Guam uses the US Dollar, so no need to worry about currency exchange! Tipping is also similar to the mainland US; it's customary to tip around 15-20% for good service in restaurants and for tour guides. While not strictly mandatory, it's a appreciated gesture for excellent service.
What is the cheapest month to visit Guam, USA?
Guam, USA is generally cheapest to visit during its quieter off-season, around Apr. Hotel and flight prices tend to be lower then and there are fewer crowds; the trade-off is less reliable weather. Exactly how much you save depends on the destination and how far ahead you book, so staying flexible with your dates helps you find the best rates.
What should I avoid in Guam, USA?
The main thing to plan around is the weather: Apr is usually the least comfortable month to visit Guam, USA, with heavy rainfall, so it's worth avoiding if you can be flexible with your dates. If a comfortable climate is your priority, aim for Sep or Oct instead.
Is Guam, USA expensive to visit?
Costs in Guam, USA vary a lot with your travel style and when you go. Flights and accommodation tend to be most expensive around the busy Sep period and noticeably cheaper in the quieter Apr stretch, so shifting your dates can make a real difference. Booking accommodation and activities ahead, travelling outside the busiest months, and comparing prices across booking sites are the most reliable ways to keep your trip affordable.
What is Guam, USA famous for?
Guam, USA is famous for Sunrise Over Two Lovers Point, Hiking to the Hidden Waterfalls of Tarzan Falls, and Exploring the Latte Stone Park. Witness the sun paint the sky in fiery hues from this legendary cliffside viewpoint, a place steeped in Chamorro folklore. Arrive before dawn to claim a prime spot and feel the gentle sea breeze as the island awakens; the dramatic cliffs plunging into the turquoise Pacific are a sight to behold. The best time to experience it all is during Sep or Oct.
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