Current sea water temperature:
+81.9°F
| Minimum sea water temperature in April: | 84.9°F |
| Maximum sea water temperature in April: | 80.6°F |
| Average sea water temperature in April: | 83.0°F |
| more information | |
14 days
forecast
forecast
| Guam |
monthly
weather
weather
| Guam |
Sea water temperature for the last 10 days:
| April 28 | 81.9°F | April 23 | 81.9°F |
| April 27 | 81.7°F | April 22 | 81.9°F |
| April 26 | 82.0°F | April 21 | 81.9°F |
| April 25 | 82.0°F | April 20 | 81.3°F |
| April 24 | 81.9°F | April 19 | 80.8°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:
2025
2024
2023
The average sea water temperature in July of 2025 was 84.7°F. The highest and lowest sea temperatures during the month were 85.5°F and 83.7°F.
current
weather
weather
| Guam |
weather in
May
May
| 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: 02:23
April 29, wednesday
0300
79°F
W
17 mph
17 mph
0600
81°F
W
17 mph
17 mph
0900
81°F
W
17 mph
17 mph
1200
82°F
W
19 mph
19 mph
1500
82°F
W
17 mph
17 mph
1800
81°F
W
17 mph
17 mph
2100
81°F
W
17 mph
17 mph
April 30, thursday
0000
81°F
W
17 mph
17 mph
