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Surf Forecasts:
Umatac surfForecast / Guam / Guam
48hr Weather and Surf, issued 9 am Friday 05 Sep 2025 ChST
How big are the waves at Umatac today?
The current surf forecast for Umatac at 3PM is: 0.4m 11s primary swell from a North-northeast direction (forecast issued at 09:00am September 05). An open ocean swell of 0.9m 9s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (05 Sep) | 1.5ft (0.4m) | 11s |
| Afternoon (05 Sep) | 1.5ft (0.4m) | 11s |
| Evening (05 Sep) | 1.5ft (0.4m) | 11s |
Table - waves today at Umatac. (Swell directed towards the surf break)
Friday 05 | Saturday 06 | Sunday 07 | Mon 08 | |||||||||||||||||||||
| 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
| Energy (?) | 50 | 49 | 49 | 50 | 49 | 50 | 46 | 52 | 47 | 51 | 48 | 47 | 46 | 45 | 44 | 37 | 36 | 36 | 22 | 22 | 22 | 22 | 22 | 22 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | off | off | cross- off | cross- off | cross- off | off | off | off | off | off | off | off | off | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | glass | glass |
High Tide / height (m) | 4:32AM 0.66 | 7:09PM 0.71 | 5:30AM 0.70 | 7:35PM 0.72 | 6:24AM 0.73 | 7:59PM 0.73 | ||||||||||||||||||
Low Tide / height (m) | 11:53AM -0.05 | 12:22AM 0.43 | 12:35PM -0.07 | 12:59AM 0.36 | 1:15PM -0.05 | 1:37AM 0.28 | ||||||||||||||||||
Friday 05 | Saturday 06 | Sunday 07 | Mon 08 | |||||||||||||||||||||
| Sunrise | 6:09 | - | - | - | - | - | - | - | 6:09 | - | - | - | - | - | - | - | 6:09 | - | - | - | - | - | - | - |
| Sunset | - | - | - | 6:30 | - | - | - | - | - | - | - | 6:29 | - | - | - | - | - | - | - | 6:28 | - | - | - | - |
 | |  | |  | |  | | | | | | | | |  | | | | | | | | | |
Rain (mm) | 2 | 1 | - | - | - | - | 1 | 1 | 2 | - | - | - | - | - | - | - | - | - | 2 | 1 | - | - | - | 1 |
| Temp. °C | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 29 | 28 | 29 | 29 | 28 | 28 | 28 |
| Feels °C (?) | 32 | 31 | 31 | 31 | 32 | 33 | 31 | 32 | 32 | 33 | 32 | 33 | 33 | 33 | 32 | 32 | 32 | 33 | 31 | 33 | 33 | 32 | 33 | 33 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Guam
Continuing clean conditions at Umatac (calm at Windward Hills wx 13 km from Umatac). 0.3m 9s swell from the NW to make surfable waves.
1 h 35 min ago
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