Guam Weather Forecast
Guam weather: 80°F, overcast. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
7-day forecast for Guam
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Wed, Oct 21 | 🌧️ Heavy drizzle | 92° / 79° | 76% · 0,2 in | 13 mph | 8 |
| Thu, Oct 22 | 🌧️ Showers | 91° / 74° | 83% · 0,3 in | 15 mph | 8 |
| Fri, Oct 23 | 🌦️ Drizzle | 89° / 76° | 94% · 0,1 in | 12 mph | 8 |
| Sat, Oct 24 | 🌦️ Drizzle | 90° / 78° | 100% · 0,2 in | 11 mph | 8 |
| Sun, Oct 25 | 🌦️ Light drizzle | 91° / 78° | 100% · 0,1 in | 11 mph | 7 |
| Mon, Oct 26 | 🌦️ Light drizzle | 91° / 76° | 92% · 0,0 in | 12 mph | 8 |
| Tue, Oct 27 | 🌦️ Light drizzle | 91° / 76° | 65% · 0,0 in | 4 mph | 8 |
Weekend outlook
🌦️ 90° / 78°
Drizzle · 100% rain · wind 11 mph
🌦️ 91° / 78°
Light drizzle · 100% rain · wind 11 mph
Is today a good day to visit?
Activity scores from 0 to 10 based on temperature, rain, wind, sun and visibility.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- A packable rain shell - 7 of the next 7 days carry a real chance of rain
- Insect repellent and quick-dry fabrics for humidity
- Avoid long hikes after mid-morning; start at dawn or leave it for a cooler day.
- If your dates are flexible, avoid July, August and September - historically the least comfortable months here.
See the Guam forecast by time range
Guam weather - more answers
Explore Guam
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is Guam?
Guam is a country in Oceania. Its coordinates are 13.4443, 144.7937. It lies in Oceania.
What is the weather like in Guam right now?
It is currently 80°F (27°C) with overcast. Humidity is 88% and wind is 5 mph.
When is the best time to visit Guam?
January, February and December offer the most comfortable conditions in Guam, which has a tropical climate. July, August and September are usually the hardest months for outdoor plans.
What time zone is Guam in?
Guam observes Pacific/Guam (UTC+10:00). The local time is 5:34 AM.
How many people live in Guam?
Guam has a population of approximately 170.000.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (countries-v1) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated October 21, 2026 at 5:34 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
