Current sea water temperature:
+84.4°F
| Minimum sea water temperature in July: | 87.6°F |
| Maximum sea water temperature in July: | 82.8°F |
| Average sea water temperature in July: | 85.3°F |
| more information | |
14 days
forecast
forecast
| Guam |
monthly
weather
weather
| Guam |
Sea water temperature for the last 10 days:
| July 20 | 84.4°F | July 15 | 84.0°F |
| July 19 | 83.8°F | July 14 | 84.0°F |
| July 18 | 83.8°F | July 13 | 83.7°F |
| July 17 | 83.3°F | July 12 | 83.8°F |
| July 16 | 83.1°F | July 11 | 84.4°F |
Monthly sea water temperature, °F
When is the warmest sea in Guam?
Based on the data about daily sea water temperature for the last three years the warmest sea in Guam was noticed in August, September and July.
Monthly Sea Temperatures in Guam, °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.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 85.0°F. The highest and lowest sea temperatures during the month were 85.8°F and 84.0°F.
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.
current
weather
weather
| Guam |
weather in
July
July
| Guam |
Best time for vacation in Guam
Guam on a weather map
Places in Northern Mariana Islands:
Name
°F
24 Hours Forecast
Guam
Local time: 11:21
July 21, tuesday
1200
86°F
N
12 mph
12 mph
1500
86°F
N
12 mph
12 mph
1800
84°F
NE
12 mph
12 mph
2100
82°F
NE
9 mph
9 mph
July 22, wednesday
0000
81°F
NE
7 mph
7 mph
0300
81°F
NE
6 mph
6 mph
0600
81°F
NE
3 mph
3 mph
0900
82°F
NE
5 mph
5 mph
