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.

Friday
11th Sep
30

26

5

11
Saturday
12th Sep
30

26

6

11
Sunday
13th Sep
30

26

6

11
Monday
14th Sep
30

26

6

11
Tuesday
15th Sep
30

25

3

11

5-day weather forecast updated at 04:00 on Thursday 10th September 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 Friday 11th September 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 2-5 mm of rainfall expected with 42% chance of some rain and a gentle breeze of 14 kph from the north-east.

30
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
11
UV index (Extreme)
42
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
14
kph wind from NE

Guam weather for Saturday 12th September 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 2-5 mm of rainfall expected with 42% chance of some rain and a light breeze of 8 kph from the east.

30
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
42
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
8
kph wind from E

Guam weather for Sunday 13th September 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 0-2 mm of rainfall expected with 46% chance of some rain and a light breeze of 10 kph from the east.

30
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
46
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
10
kph wind from E

Guam weather for Monday 14th September 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 5-10 mm of rainfall expected with 57% chance of some rain and a light breeze of 12 kph from the north-east.

30
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
57
% chance of some rain
<10
mm of rainfall expected
M
moderate heat & humidity
12
kph wind from NE

Guam weather for Tuesday 15th September 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 3 hours of bright sunshine. There are 20-30 mm of rainfall expected with 74% chance of some rain and a gentle breeze of 17 kph from the west.