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Surf Forecasts:
Umatac surfForecast / Guam / Guam
48hr Weather and Surf, issued 9 pm Monday 20 Apr 2026 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
27.3° C
(Which is slightly cooler than normal)How big are the waves at Umatac today?
The current surf forecast for Umatac at 12AM is: 1.3m 12s primary swell from a North direction (forecast issued at 09:00pm April 20). An open ocean swell of 0.4m 12s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Apr) | 4ft (1.2m) | 12s |
| Afternoon (21 Apr) | 3.5ft (1.1m) | 12s |
| Evening (21 Apr) | 3.5ft (1.0m) | 11s |
Table - waves today at Umatac. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Mon 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||||||||
| 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 | 7 AM | 10 AM | 1 PM | 4 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |   |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 11 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 520 | 433 | 456 | 396 | 404 | 404 | 336 | 319 | 302 | 260 | 274 | 288 | 273 | 221 | 221 | 217 | 210 | 170 | 173 | 176 | 190 | 190 | 190 | 151 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- 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 | 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) | 11:06PM 0.74 | 9:03AM 0.76 | 12:17AM 0.73 | 9:46AM 0.73 | 1:33AM 0.71 | 10:40AM 0.68 | ||||||||||||||||||
Low Tide / height (m) | 4:01AM 0.49 | 4:36PM -0.17 | 5:00AM 0.54 | 5:35PM -0.14 | 6:18AM 0.56 | |||||||||||||||||||
Mon 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 6:05 | - | - | - | - | - | - | - | 6:05 | - | - | - | - | - | - | - | 6:03 | - | - | - |
| Sunset | - | - | - | - | - | - | - | 6:34 | - | - | - | - | - | - | - | 6:35 | - | - | - | - | - | - | - | 6:35 |
 | | |  |  |  | | | | | | | | |  | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | - | - | - | - | - | - | - | - | - |
| Temp. °C | 27 | 26 | 26 | 26 | 25 | 26 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 |
| Feels °C (?) | 30 | 29 | 29 | 29 | 27 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 26 | 27 | 27 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Umatac surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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