19.03
thu
thu
Day
79°F
SW 19 mph
Precip.
100%
100%
Night
77°F
SW 16 mph
Precip.
100%
100%
20.03
fri
fri
Day
81°F
SW 18 mph
Precip.
0%
0%
Night
79°F
SW 15 mph
Precip.
0%
0%
21.03
sat
sat
Day
81°F
SW 19 mph
Precip.
100%
100%
Night
79°F
W 19 mph
Precip.
0%
0%
22.03
sun
sun
Day
82°F
SW 18 mph
Precip.
100%
100%
Night
81°F
SW 19 mph
Precip.
0%
0%
23.03
mon
mon
Day
81°F
SW 19 mph
Precip.
100%
100%
Night
79°F
SW 17 mph
Precip.
100%
100%
24.03
tue
tue
Day
81°F
SW 17 mph
Precip.
100%
100%
Night
79°F
SW 14 mph
Precip.
100%
100%
25.03
wed
wed
Day
82°F
SW 15 mph
Precip.
100%
100%
Night
79°F
SW 13 mph
Precip.
100%
100%
Sea water temperature in March, °F
Show year:
2026
2025
2024
The average sea water temperature in March of 2026 was 81.8°F. The highest and lowest sea temperatures during the month were 82.6°F and 81.1°F.
Sea water temperature in April, °F
Show year:
2025
2024
2023
The average sea water temperature in April of 2025 was 83.5°F. The highest and lowest sea temperatures during the month were 84.2°F and 82.8°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
Guam on a weather map
Places in Northern Mariana Islands:
Name
°F
24 Hours Forecast
Guam
Local time: 01:07
March 19, thursday
0300
75°F
SW
16 mph
16 mph
0600
77°F
SW
16 mph
16 mph
0900
79°F
SW
18 mph
18 mph
1200
79°F
SW
19 mph
19 mph
1500
79°F
SW
18 mph
18 mph
1800
79°F
SW
17 mph
17 mph
2100
79°F
SW
16 mph
16 mph
March 20, friday
0000
77°F
SW
16 mph
16 mph
