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.

Thursday
15th Oct
29

25

5

10
Friday
16th Oct
30

26

6

10
Saturday
17th Oct
30

25

6

8
Sunday
18th Oct
27

25

0

2
Monday
19th Oct
28

25

1

4

5-day weather forecast updated at 04:00 on Wednesday 14th October 2026 GMT

More about Guam

Guam by month

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

Recommended for Guam

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 Thursday 15th October 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 10 (Very High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 39% chance of some rain and a light breeze of 12 kph from the north-east.

29
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
10
UV index (Very High)
39
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
12
kph wind from NE

Guam weather for Friday 16th October 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 10 (Very High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 57% chance of some rain and a gentle breeze of 15 kph from the north-east.

30
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
10
UV index (Very High)
57
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
15
kph wind from NE

Guam weather for Saturday 17th October 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 65% chance of some rain and a moderate breeze of 20 kph from the north.

30
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
8
UV index (Very High)
65
% chance of some rain
<10
mm of rainfall expected
M
moderate heat & humidity
20
kph wind from N

Guam weather for Sunday 18th October 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 2 (Low) and no hours of bright sunshine. There are 50 mm or more of rainfall expected with 94% chance of some rain and a fresh breeze of 35 kph from the north-west.

27
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
2
UV index (Low)
94
% chance of some rain
>50
mm or more of rainfall expected
L
low heat & humidity
35
kph wind from NW

Guam weather for Monday 19th October 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 28°C, moderate levels of heat & humidity, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 40-50 mm of rainfall expected with 93% chance of some rain and a fresh breeze of 30 kph from the south.