worldweatherHot days and overnight relief
1 of 7 days ≥30°CThe high comes from the warmest place and the low from the coldest. These values may come from different cities in the country.
Weather in Guam - today, tomorrow and 14-day forecast
Forecast updated: Tuesday 3 NovemberWeather history: NASA POWER · 1981-2025
Weather in the coming days
What will the week bring? Guam
3 November Guam: the high will be about 31°C and the low 25°C. Light rainfall - around 1.1 mm. 4 November it will be cooler: with a high of about 29°C.
Temperatures show the highest daily maximum and lowest minimum across 4 cities and regions - they may come from different places. Historical temperatures use the same calculation for the same locations. Rainfall and wind are medians. Compare local conditions on the map.
31°C
maximum on Tue 3 Nov
Temperature, rainfall and historical comparison
Weather forecast compared with previous years
Choose a day to see the details. Temperatures show the daily high and low.
Forecast: daily highTypical range 1991-2020
Selected day in detail
Tuesday 3 November
Daily high31°CUsually 28-29°C
Daily low25°CColdest part of the day
Rainfall total1.1 mmLight rainfall
Maximum wind speed23 km/hForecast wind speed
Warmer than usual. The historical comparison uses daily highs at this time of year. The daily rainfall total shows the amount of rain forecast across the full day.
Full day-by-day forecast - table
| Date | Max. / min. | Rain | Typical daily high | Max. wind |
|---|---|---|---|---|
| Tuesday 3 November | 31° / 25° | 1.1 mm | 28-29°C | 23 km/h |
| Wednesday 4 November | 29° / 26° | 2.3 mm | 28-29°C | 20 km/h |
| Thursday 5 November | 29° / 26° | 2 mm | 28-29°C | 22 km/h |
| Friday 6 November | 28° / 26° | 2.3 mm | 28-29°C | 23 km/h |
| Saturday 7 November | 29° / 25° | 1.8 mm | 28-29°C | 14 km/h |
| Sunday 8 November | 29° / 26° | 1.5 mm | 28-29°C | 22 km/h |
| Monday 9 November | 29° / 26° | 2.3 mm | 28-29°C | 27 km/h |
| Tuesday 10 November | 29° / 26° | 1.2 mm | 28-29°C | 22 km/h |
| Wednesday 11 November | 29° / 26° | 0.7 mm | 28-29°C | 19 km/h |
| Thursday 12 November | 29° / 26° | 2.9 mm | 28-29°C | 15 km/h |
| Friday 13 November | 29° / 26° | 2.1 mm | 28-29°C | 17 km/h |
| Saturday 14 November | 29° / 25° | 1.5 mm | 28-29°C | 19 km/h |
| Sunday 15 November | 29° / 25° | 0.7 mm | 28-29°C | 15 km/h |
| Monday 16 November | 28° / 26° | 3.5 mm | 28-29°C | 18 km/h |
What stands out this week?
Temperature changes
No sharp coolingThe first 7 forecast days show no day-to-day drop of 3°C or more in the high.
Will it rain?
7 days with rain ≥1 mm7-day total: 13.2 mm. Across 45 historical seasons, the typical range for the same dates was 13-56 mm.
This summary covers the first 7 forecast days. A rainy day has at least 1 mm of rain. The historical comparison shows how often such days occurred in previous years.
Where will it be warmer or less rainy?
Compare the next 7 days by temperature, rainfall and sightseeing comfort.
| Place | Average daily high | Compared with normal | Rainfall total | Days with rain ≥1 mm |
|---|---|---|---|---|
| Yigo | 28°C | -0.9°C | 14.4 mm | 6 / 7 |
| Dededo | 28°C | -0.6°C | 13.2 mm | 6 / 7 |
| Mangilao | 29°C | -0.2°C | 14.1 mm | 7 / 7 |
| Tamuning | 29°C | +0.2°C | 12.3 mm | 7 / 7 |
Difference from the average historical median daily highs for these dates. Each city is compared with its own normal.
Weather history 1981-2025
NASA POWERThe same week in previous years
How warm was this week in previous years?
Each bar shows the average daily high during the same 7-day period in each year.
cooler yearstypical rangewarmer years2026 forecastcurrent forecast
From 1981 to 2025, the 3-9 Nov period averaged 29°C by day. The coolest year was 1991 (28°C) and the warmest was 2003 (30°C). The current forecast averages 29°C - higher than in 71% of historical years.
How do we compare the forecast with history?
The forecast chart band shows the 20th-80th percentiles of NASA POWER daily highs from 1991-2020, using the date and a ±7-calendar-day window. The line shows the forecast daily high. The year-by-year chart compares average highs over the same seven dates.
NASA POWER (MERRA-2) data describe conditions in the grid cell covering the location. Elevation and local conditions can affect the comparison. Temperatures show the highest daily maximum and lowest minimum across 4 cities and regions - they may come from different places. Historical temperatures use the same calculation for the same locations. Rainfall and wind are medians. Compare local conditions on the map.
NASA POWER source and methodologyWeather in cities and regions
Weather map Guam
Compare temperatures and rainfall. Select a city for the full forecast.
City / regionMax. / min.Rain
1Dededo30°26°0.8mm2Yigo30°25°0.7mm3Tamuning31°27°1.4mm4Mangilao30°26°1.4mmPlan your trip
Partner offersTravel offers: Guam
What else should you know before travelling?
What weather is typical in the following weeks?
For dates beyond the 14-day forecast, we show typical conditions based on historical data.
Tue 17 Nov - Mon 30 Nov29°C / 28°Cusual daily high / low
Tue 1 Dec - Thu 17 Dec29°C / 28°Cusual daily high / low
Average of the daily medians for the following dates from 1991-2020. A comparison based on historical data.
Downloadable forecast graphic
Right now temperatures across Guam range from 30° to 31°. Below: today's conditions city by city, a live weather map, the 14-day outlook and month-by-month climate to help you pick the best time to travel.
Country values are the median of forecasts from 4 cities; the range shows local differences. Methodology.
UV index in Guam - is it safe to sunbathe?
Today the UV index in Guam is 8 (high) - unprotected fair skin can burn in about 25 minutes. SPF 30-50, a hat and sunglasses are a must. Better stay in shade between 11:00 and 15:00.
Sea temperature - Guam
Water today
29°C
Week avg
29°C
Waves today
1 m
How's the water?
very warm
16-day sea temperature forecast:
Average sea temperature through the year:
| Beach | Water today | Water week avg | Waves | How's the water? |
|---|---|---|---|---|
| Yigo | 29℃ | 29℃ | 1.1 m | very warm |
| Mangilao | 29℃ | 29℃ | 1 m | very warm |
| Dededo | 29℃ | 29℃ | 1.1 m | very warm |
| Tamuning | 29℃ | 29℃ | 1 m | very warm |
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.
Guam weather through the year
| Month | Day | Night | Chance of rain |
|---|---|---|---|
| January ★ | 30°C | 25°C | 62% |
| February ★ | 30°C | 24°C | 62% |
| March ★ | 31°C | 25°C | 59% |
| April ★ | 31°C | 26°C | 69% |
| May | 32°C | 26°C | 53% |
| June | 32°C | 26°C | 71% |
| July | 31°C | 26°C | 77% |
| August | 31°C | 25°C | 85% |
| September | 31°C | 25°C | 83% |
| October | 31°C | 25°C | 80% |
| November | 32°C | 26°C | 69% |
| December | 31°C | 26°C | 71% |
★ - months most often recommended for travel
Plan a trip for another time of year
Guam weather month by month - when is the best time to go?
Compare temperatures, rainfall and city weather for each month.
Guam weather - other months
Guam weather in December - temperature, rain and is it a good time to visit?
Guam weather in January - temperature, rain and is it a good time to visit?
Guam weather in February - temperature, rain and is it a good time to visit?
Guam weather in March - temperature, rain and is it a good time to visit?
Weather in other countries in Oceania
Weather and travel dates: Guam
Based on the historical data in the climate table for this location.
Warmest months
Average daytime temperature: 32°C
Coolest months
Average daytime temperature: 30°C
Lowest share of days with precipitation
Share of days with precipitation: 53%
Before you travel
Check the forecast daytime and nighttime temperatures, precipitation and current warnings. Use them to choose clothing and plan outdoor activities.
Official travel information
Select your destination on the government website and check the latest advice. Entry requirements depend on factors including citizenship and the purpose of your trip.
FAQ - Guam weather
What will the weather be like today and tomorrow?
3 November Guam: the high will be about 31°C and the low 25°C. Light rainfall - around 1.1 mm. 4 November it will be cooler: with a high of about 29°C.
Will it rain in the coming days?
7-day total: 13.2 mm. Across 45 historical seasons, the typical range for the same dates was 13-56 mm.
What does the typical range on the chart mean?
It is the range between the 20th and 80th percentiles of NASA POWER daily highs from 1991-2020 for this time of year.
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