Current sea water temperature:
+83.3°F
| Minimum sea water temperature in May: | 86.7°F |
| Maximum sea water temperature in May: | 81.9°F |
| Average sea water temperature in May: | 84.1°F |
| more information | |
14 days
forecast
forecast
| Guam |
monthly
weather
weather
| Guam |
Sea water temperature for the last 10 days:
| May 18 | 83.3°F | May 13 | 83.1°F |
| May 17 | 83.3°F | May 12 | 82.9°F |
| May 16 | 83.5°F | May 11 | 82.2°F |
| May 15 | 83.5°F | May 10 | 82.4°F |
| May 14 | 83.3°F | May 9 | 82.6°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: 08:18
May 19, tuesday
0900
82°F
W
19 mph
19 mph
1200
84°F
W
19 mph
19 mph
1500
84°F
W
18 mph
18 mph
1800
82°F
W
17 mph
17 mph
2100
81°F
W
17 mph
17 mph
May 20, wednesday
0000
81°F
W
17 mph
17 mph
0300
81°F
W
18 mph
18 mph
0600
81°F
W
17 mph
17 mph
