Guam weather live forecast

Today's maximum temperature in Guam is expected to be 29°C. Select a day from the live weather forecast for Guam (Agana) for more weather parameters.

Saturday
13th Dec
29

26

6

8
Sunday
14th Dec
29

25

5

7
Monday
15th Dec
30

26

7

8
Tuesday
16th Dec
30

26

4

8
Wednesday
17th Dec
30

26

5

8

5-day weather forecast updated at 04:00 on Friday 12th December 2025 GMT

More about Guam

Guam by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Guam

KAYAK: Explore destinations from the UK

Sale

Explore top offers on direct flights from the UK
Filter destinations by price, trip type, flight time & more
Choose a destination to see cheapest fares & airlines

Go to KAYAK deal >>

View all KAYAK offers

The 5-day weather forecast for Guam, represented by Agana, (Agana) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Guam weather forecast by day

Below are the detailed weather forecasts for Guam for the next 5 days. The forecasts shown are for Agana and may not represent the whole of Guam. Browse more destinations in Guam to view more weather forecasts.

Guam weather for Saturday 13th December 2025

Expect isolated thunderstorms in Guam with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 45% chance of some rain and a moderate breeze of 23 kph from the east.

29
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
8
UV index (Very High)
45
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
23
kph wind from E

Guam weather for Sunday 14th December 2025

Expect isolated thunderstorms in Guam with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 68% chance of some rain and a moderate breeze of 27 kph from the east.

29
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
7
UV index (High)
68
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
27
kph wind from E

Guam weather for Monday 15th December 2025

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 7 hours of bright sunshine. There are 5-10 mm of rainfall expected with 68% chance of some rain and a moderate breeze of 21 kph from the east.

30
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
7
hours of sunshine
8
UV index (Very High)
68
% chance of some rain
<10
mm of rainfall expected
M
moderate heat & humidity
21
kph wind from E

Guam weather for Tuesday 16th December 2025

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 63% chance of some rain and a moderate breeze of 23 kph from the north-east.

30
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
8
UV index (Very High)
63
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
23
kph wind from NE

Guam weather for Wednesday 17th December 2025

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 65% chance of some rain and a moderate breeze of 23 kph from the east.