21.07
tue
tue
Day
84°F
N 11 mph
Precip.
16%
16%
Night
81°F
NE 6 mph
Precip.
13%
13%
22.07
wed
wed
Day
86°F
NE 9 mph
Precip.
7%
7%
Night
81°F
S 3 mph
Precip.
11%
11%
23.07
thu
thu
Day
82°F
SE 2 mph
Precip.
25%
25%
Night
81°F
S 4 mph
Precip.
50%
50%
24.07
fri
fri
Day
84°F
S 6 mph
Precip.
7%
7%
Night
81°F
SW 5 mph
Precip.
10%
10%
25.07
sat
sat
Day
84°F
SW 4 mph
Precip.
6%
6%
Night
81°F
W 5 mph
Precip.
10%
10%
26.07
sun
sun
Day
84°F
W 5 mph
Precip.
14%
14%
Night
81°F
W 7 mph
Precip.
11%
11%
27.07
mon
mon
Day
84°F
W 9 mph
Precip.
14%
14%
Night
81°F
W 7 mph
Precip.
13%
13%
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 84.3°F. The highest and lowest sea temperatures during the month were 85.6°F and 83.1°F.
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 85.0°F. The highest and lowest sea temperatures during the month were 85.8°F and 84.0°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: 19:44
July 21, tuesday
2100
82°F
NE
9 mph
9 mph
July 22, wednesday
0000
81°F
NE
6 mph
6 mph
0300
81°F
NE
2 mph
2 mph
0600
79°F
N
2 mph
2 mph
0900
82°F
N
6 mph
6 mph
1200
86°F
NE
9 mph
9 mph
1500
84°F
NE
8 mph
8 mph
1800
82°F
E
5 mph
5 mph
