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Umatac surfForecast / Guam / Guam
48hr Weather and Surf, issued 9 am Friday 05 Dec 2025 ChSTForecast update in hr min s Forecast update imminent
Umatac surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Umatac sea temperature is
29.6° C
(Which is 1.2°C warmer than normal for this time of year)How big are the waves at Umatac today?
The current surf forecast for Umatac at 1PM is: 0.4m 13s primary swell from a North-northeast direction and 0.2m 8s secondary swell from a North direction (forecast issued at 09:00am December 05). An open ocean swell of 1.5m 8s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (05 Dec) | 1.5ft (0.4m) | 13s |
| Afternoon (05 Dec) | 1.5ft (0.4m) | 13s |
| Evening (05 Dec) | 1.5ft (0.5m) | 14s |
Table - waves today at Umatac. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
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) (?) | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 12 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 16 | 15 | 15 | 15 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 66 | 66 | 66 | 65 | 66 | 97 | 97 | 92 | 123 | 317 | 494 | 494 | 477 | 394 | 322 | 255 | 227 | 186 | 96 | 169 | 158 | 209 | 209 | 193 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | off | off | off | off | off | off | off | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 8:43AM 0.80 | 6:27PM 0.79 | 9:37AM 0.82 | 7:12PM 0.78 | 10:29AM 0.82 | 8:00PM 0.76 | ||||||||||||||||||
Low Tide / height (m) | 1:38PM 0.52 | 2:00AM -0.29 | 2:32PM 0.55 | 2:48AM -0.29 | 3:27PM 0.55 | 3:37AM -0.25 | ||||||||||||||||||
Friday 05 | Saturday 06 | Sunday 07 | Mon 08 | |||||||||||||||||||||
| Sunrise | 6:28 | - | - | - | - | - | - | - | 6:30 | - | - | - | - | - | - | - | 6:31 | - | - | - | - | - | - | - |
| Sunset | - | - | - | 5:52 | - | - | - | - | - | - | - | 5:52 | - | - | - | - | - | - | - | 5:52 | - | - | - | - |
 | | | |  |  | |  |  | | | | | | | | | | |  | | | | | |
Rain (mm) | 4 | 4 | 3 | 1 | 2 | - | - | - | - | - | - | - | - | - | 1 | 1 | - | - | 1 | - | - | - | - | - |
| Temp. °C | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 27 | 27 | 27 |
| Feels °C (?) | 28 | 29 | 29 | 30 | 29 | 29 | 29 | 29 | 29 | 30 | 29 | 30 | 31 | 31 | 29 | 28 | 28 | 30 | 29 | 28 | 29 | 28 | 28 | 29 |
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Ocean Swells (m)- Wind Speed (km/h)
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