World Resorts Northern Mariana Islands Guam Weather

Guam 7 Days Forecast

17.12
wed
Day
82°F
W 19 mph
Precip.
100%
Night
81°F
W 16 mph
Precip.
61%
18.12
thu
Day
82°F
W 18 mph
Precip.
100%
Night
81°F
W 14 mph
Precip.
0%
19.12
fri
Day
82°F
SW 17 mph
Precip.
100%
Night
81°F
W 16 mph
Precip.
100%
20.12
sat
Day
82°F
W 20 mph
Precip.
100%
Night
81°F
W 18 mph
Precip.
73%
21.12
sun
Day
82°F
W 21 mph
Precip.
100%
Night
81°F
W 19 mph
Precip.
40%
22.12
mon
Day
82°F
W 16 mph
Precip.
100%
Night
81°F
W 12 mph
Precip.
100%
23.12
tue
Day
82°F
NW 7 mph
Precip.
100%
Night
79°F
S 4 mph
Precip.
100%

Sea water temperature in December, °F

Show year:
2025
2024
2023

The average sea water temperature in December of 2025 was 83.8°F. The highest and lowest sea temperatures during the month were 84.0°F and 83.5°F.

Air temperature in Guam, °F

Precipitation total in Guam, in.

* Charts above show average data for the last 3 years.

Best time for vacation in Guam

Sunniest months:
July 5 days
August 5 days
September 5 days
Warmest months:
June 87.5 °F
July 87.3 °F
August 87.0 °F
Warmest sea temp:
August 85.5 °F
September 85.4 °F
July 85.3 °F
Coldest months:
February 83.2 °F
January 83.9 °F
March 84.2 °F
Rainiest months:
October 15 days
August 14 days
September 14 days
Windiest months:
February 17.4 mph
December 17.3 mph
January 16.8 mph

Guam on a weather map

Current weather
00:06
Guam
+81°F
W 17 mph
Feels like: +86°F
Precip.: 0%
Places in Northern Mariana Islands:
Name
°F
Guam
+81°F
Rota
+82°F
Saipan
+82°F
Susupe
+82°F
Tinian
+82°F
24 Hours Forecast
Guam
Local time: 00:06
December 17, wednesday
0300
81°F
SW
17 mph
0600
81°F
SW
18 mph
0900
82°F
W
19 mph
1200
82°F
W
19 mph
1500
82°F
W
17 mph
1800
81°F
W
16 mph
2100
81°F
W
16 mph
December 18, thursday
0000
81°F
W
16 mph
Units of measurement: °C / °F