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.

Saturday
23rd May
30

27

7

UV8
Sunday
24th May
30

27

5

UV11
Monday
25th May
30

27

4

UV11
Tuesday
26th May
30

26

4

UV11
Wednesday
27th May
30

26

2

UV8

5-day weather forecast updated at 04:00 on Saturday 23rd May 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 23rd May 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 7 hours of bright sunshine. There are 10-20 mm of rainfall expected with 72% chance of some rain and a moderate breeze of 22 kph from the east.

30
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
7
hours of sunshine
UV8
UV index (Very High)
72
% chance of some rain
<20
mm of rainfall expected
M
moderate heat & humidity
22
kph wind from E

Guam weather for Sunday 24th May 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 66% chance of some rain and a moderate breeze of 23 kph from the east.

30
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
UV11
UV index (Extreme)
66
% chance of some rain
<20
mm of rainfall expected
M
moderate heat & humidity
23
kph wind from E

Guam weather for Monday 25th May 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 10-20 mm of rainfall expected with 77% chance of some rain and a moderate breeze of 22 kph from the east.

30
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
UV11
UV index (Extreme)
77
% chance of some rain
<20
mm of rainfall expected
M
moderate heat & humidity
22
kph wind from E

Guam weather for Tuesday 26th May 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 10-20 mm of rainfall expected with 91% chance of some rain and a moderate breeze of 22 kph from the east.

30
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
UV11
UV index (Extreme)
91
% chance of some rain
<20
mm of rainfall expected
M
moderate heat & humidity
22
kph wind from E

Guam weather for Wednesday 27th May 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 2 hours of bright sunshine. There are 30-40 mm of rainfall expected with 82% chance of some rain and a moderate breeze of 23 kph from the south-east.