Guam weather live forecast

Today's maximum temperature in Guam is expected to be 31°C. Select a day from the live weather forecast for Guam (Agana) for more weather parameters.

Saturday
4th Jul
31

27

6

11
Sunday
5th Jul
30

27

4

9
Monday
6th Jul
28

27

4

1
Tuesday
7th Jul
30

27

5

5
Wednesday
8th Jul
30

27

1

9

5-day weather forecast updated at 04:00 on Friday 3rd July 2026 GMT

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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 4th July 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 69% chance of some rain and a moderate breeze of 20 kph from the north.

31
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
69
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
20
kph wind from N

Guam weather for Sunday 5th July 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 4 hours of bright sunshine. There are 30-40 mm of rainfall expected with 90% chance of some rain and a strong breeze of 44 kph from the north.

30
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
9
UV index (Very High)
90
% chance of some rain
<40
mm of rainfall expected
M
moderate heat & humidity
44
kph wind from N

Guam weather for Monday 6th July 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 28°C, moderate levels of heat & humidity, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 50 mm or more of rainfall expected with 99% chance of some rain and a moderate gale of 58 kph from the south-west.

28
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
1
UV index (Low)
99
% chance of some rain
>50
mm or more of rainfall expected
M
moderate heat & humidity
58
kph wind from SW

Guam weather for Tuesday 7th July 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 5 (Moderate) and 5 hours of bright sunshine. There are 20-30 mm of rainfall expected with 97% chance of some rain and a strong breeze of 42 kph from the south.

30
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
5
UV index (Moderate)
97
% chance of some rain
<30
mm of rainfall expected
M
moderate heat & humidity
42
kph wind from S

Guam weather for Wednesday 8th July 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 1 hour of bright sunshine. There are 20-30 mm of rainfall expected with 93% chance of some rain and a moderate breeze of 28 kph from the south.