Current Sea Water Temperature:
+89.8°F
| Maximum Sea Water Temperature in September: | 91.6°F |
| Minimum Sea Water Temperature in September: | 87.0°F |
| Average water temperature in September: | 89.4°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| September 28 | 89.8°F | September 23 | 89.4°F |
| September 27 | 89.8°F | September 22 | 89.4°F |
| September 26 | 89.6°F | September 21 | 88.8°F |
| September 25 | 89.2°F | September 20 | 89.0°F |
| September 24 | 89.4°F | September 19 | 89.2°F |
When is the Warmest Sea for Guam?
According to our data for the last three years for Guam the highest average sea water temperature was in September, August and July.
Average Water Temperature by Month, °F
Sea Water Temperature in September
The average sea surface temperature in September 2026 for Guam was 89.3°F. The maximum and minimum values were 88.8°F and 89.8°F respectively.
Sea Water Temperature in August
The average sea surface temperature in August 2026 for Guam was 88.6°F. The maximum and minimum values were 87.8°F and 89.8°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2026 for Guam was 88.5°F. The maximum and minimum values were 86.8°F and 89.8°F respectively.
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Guam
Local time: 10:43
29 sep, tuesday
| 1200 |  |
88°F | E 6 mph |
| 1500 |  |
88°F | E 9 mph |
| 1800 |  |
88°F | E 7 mph |
| 2100 | |
86°F | E 6 mph |
30 sep, wednesday
| 0000 | |
86°F | SE 7 mph |
| 0300 | |
86°F | E 7 mph |
| 0600 | |
86°F | SE 7 mph |
| 0900 | |
88°F | E 6 mph |