Current sea water temperature:
+85.5°F
| Minimum sea water temperature in August: | 88.2°F |
| Maximum sea water temperature in August: | 83.5°F |
| Average sea water temperature in August: | 85.4°F |
| more information | |
14 days
forecast
forecast
| Guam |
monthly
weather
weather
| Guam |
Sea water temperature for the last 10 days:
| August 30 | 85.5°F | August 25 | 84.9°F |
| August 29 | 85.5°F | August 24 | 84.7°F |
| August 28 | 85.6°F | August 23 | 84.2°F |
| August 27 | 84.9°F | August 22 | 84.4°F |
| August 26 | 84.7°F | August 21 | 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 September, August and July.
Monthly Sea Temperatures in Guam, °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 August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 84.7°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 84.7°F. The highest and lowest sea temperatures during the month were 85.8°F and 83.1°F.
current
weather
weather
| Guam |
weather in
September
September
| 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: 20:12
August 30, sunday
2100
79°F
SE
16 mph
16 mph
August 31, monday
0000
79°F
E
14 mph
14 mph
0300
79°F
E
12 mph
12 mph
0600
79°F
E
12 mph
12 mph
0900
79°F
E
11 mph
11 mph
1200
79°F
E
11 mph
11 mph
1500
81°F
E
14 mph
14 mph
1800
79°F
E
14 mph
14 mph
