Guam weather
At 4:30 AM local time it was clear and 26°C (78°F). Mostly light, on-and-off rain; heavier around 1 PM (7.2 mm total). Best months for weather: Dec–Jun. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for Guam, Guam. Tumon Bay.
Current conditions
- Clouds
- 3%
- Chance of rain
- 4%
- Rain
- 0.0 mm/h
Hourly Forecast
Mostly light, on-and-off rain; heavier around 1 PM (7.2 mm total)
Daily Forecast
Best Time to Visit
Peak season Dec–JunOff season Aug–Oct
About Guam weather
Is it raining in Guam right now?
No. It’s clear and 26° right now. Mostly light, on-and-off rain; heavier around 1 PM (7.2 mm total).
What’s the weather like in Guam this week?
Over the next 7 days, expect highs of 31–33° and lows of 25–26°. Rain is likely on 7 of 7 days (Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday). The driest day looks like Tuesday.
Has it been raining in Guam lately?
In the past 7 days, Guam had 5 rainy days and 22.7 mm of rain in total.
What should I pack for Guam?
For the coming week, bring an umbrella or rain jacket, light, breathable clothes and sunscreen.
Guam weather by month
When is the best time to visit Guam?
Based on weather alone, the best time to visit Guam is Dec–Jun, according to NASA's 2001–2025 climate averages. Aug–Oct tends to be the least pleasant. Average highs run from 28°C (82°F) in February to 29°C (84°F) in June.
What is the rainiest month in Guam?
August is the wettest month, with about 315 mm (12.4 in) of rain on average. March is the driest, with about 42 mm (1.7 in).
What is the hottest month in Guam?
June is the warmest, with average highs of 29°C (84°F) and lows of 28°C (83°F). February is the coolest, with highs of 28°C (82°F) and lows of 27°C (80°F).
Does Guam have a rainy season?
Yes. Jul–Oct is the rainy season (150 mm or more a month), while Feb–Apr is usually dry (under 60 mm).
How warm is the sea in Guam?
The sea is warmest in August at about 30°C (86°F) and coolest in February at about 28°C (83°F). It is warm enough for swimming all year.
Guam weather month by month
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine, forecast and current conditions from Open-Meteo. Page updated . How we rate months