Guam weather live forecast

Today's maximum temperature in Guam is expected to be 30°C. Select a day from the live weather forecast for Guam (Agana) for more weather parameters.

Tuesday
28th Jul
30

27

5

11
Wednesday
29th Jul
31

27

6

9
Thursday
30th Jul
30

27

6

11
Friday
31st Jul
30

27

5

11
Saturday
1st Aug
30

27

4

11

5-day weather forecast updated at 04:00 on Sunday 26th 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 Tuesday 28th July 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 5 hours of bright sunshine. There are 10-20 mm of rainfall expected with 64% chance of some rain and a light breeze of 11 kph from the east.

30
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
11
UV index (Extreme)
64
% chance of some rain
<20
mm of rainfall expected
M
moderate heat & humidity
11
kph wind from E

Guam weather for Wednesday 29th July 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 68% chance of some rain and a light breeze of 12 kph from the south-west.

31
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
9
UV index (Very High)
68
% chance of some rain
<10
mm of rainfall expected
M
moderate heat & humidity
12
kph wind from SW

Guam weather for Thursday 30th July 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 6 hours of bright sunshine. There are 30-40 mm of rainfall expected with 76% chance of some rain and a gentle breeze of 13 kph from the south-west.

30
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
76
% chance of some rain
<40
mm of rainfall expected
M
moderate heat & humidity
13
kph wind from SW

Guam weather for Friday 31st July 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 5 hours of bright sunshine. There are 20-30 mm of rainfall expected with 83% chance of some rain and a gentle breeze of 19 kph from the west.

30
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
11
UV index (Extreme)
83
% chance of some rain
<30
mm of rainfall expected
M
moderate heat & humidity
19
kph wind from W

Guam weather for Saturday 1st August 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 4 hours of bright sunshine. There are 30-40 mm of rainfall expected with 94% chance of some rain and a moderate breeze of 22 kph from the west.