Surf Forecasts:
Umatac surf forecast from 4 Jun 2026:
- Best quality surf: Monday 8 Jun, 10PM (local time) - 2.5ft (0.8m), 13s period, N swell with offshore winds.
- Most powerful swell: Tuesday 9 Jun, 7AM (local time) - 3ft (0.9m), 12s period, N swell with 247 kJ wave energy.
- Next surfable swell (1★+): Thursday 4 Jun, 10PM (local time) - 2ft (0.6m), 10s period with WNW swell.
Best Forecast Surf Conditions for Umatac this week:
The surf forecast for Umatac over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jun 04) at 10PM. The primary swell is predicted to be 0.6m and 10s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Umatac in the next 16 days are 0.9m 12s and forecast to arrive on Tuesday (Jun 09) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 9s period and expected on Friday (Jun 05) at 1PM.
| Wave Type | Time (ChST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 4th Jun) | 2ft (0.6m) 10s |
| Best Surf | 10PM (Mon 8th Jun) | 2.5ft (0.8m) 13s |
| Most Powerful | 7AM (Tue 9th Jun) | 3ft (0.9m) 12s |
Table - best surf conditions forecast for Umatac over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 28°C on Thu afternoon, min 27°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Mon night. Warm (max 28°C on Sun afternoon, min 27°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thu 4 | Friday 5 | Saturday 6 | Sunday 7 | Monday 8 | Tuesday 9 | Wednesday 10 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | WNW 10 | WNW 9 | NW 9 | WNW 9 | NW 9 | NW 10 | NW 10 | NW 9 | N 11 | N 11 | N 11 | N 11 | N 11 | N 13 | N 12 | NNE 12 | NNE 11 | NNE 11 | NNE 10 | NNE 10 | NNE 10 |
Wave Graph | |||||||||||||||||||||
64 | 58 | 42 | 31 | 23 | 49 | 46 | 28 | 89 | 116 | 92 | 163 | 155 | 121 | 235 | 236 | 167 | 123 | 112 | 78 | 54 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | off | off | off | off | off | off | off | off | off | off | off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off |
High Tide | 11:56PM0.70m | 9:04AM0.64m | 00:33AM0.70m | 9:50AM0.61m | 1:08AM0.70m | 10:52AM0.57m | 1:40AM0.70m | 12:13PM0.54m | 2:11AM0.70m | 1:51PM0.52m | 2:42AM0.71m | 3:33PM0.53m | 3:15AM0.73m | ||||||||
Low Tide | 4:09PM-0.07m | 4:51AM0.53m | 4:46PM-0.04m | 5:43AM0.52m | 5:26PM-0.00m | 6:41AM0.48m | 6:10PM0.05m | 7:41AM0.41m | 6:58PM0.12m | 8:38AM0.31m | 7:52PM0.21m | 9:31AM0.20m | 8:52PM0.30m | 10:21AM0.08m | |||||||
— | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:54 | |
6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:46 | — | — | 6:46 | — | 6:46 | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 1 | — | 2 | 3 | — | 1 | — |
Temp °C | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 28 | 28 |
Feels °C | 31 | 31 | 30 | 30 | 32 | 30 | 30 | 31 | 30 | 30 | 31 | 30 | 30 | 31 | 31 | 30 | 31 | 30 | 31 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | E 9 | E 9 | E 9 | N 11 | N 11 | N 11 | N 11 | N 11 | N 11 | N 12 | NNE 12 | NNE 11 | NNE 11 | NNE 10 | NNE 10 | NNE 10 |
82 | 82 | 86 | 64 | 64 | 59 | 40 | 39 | 89 | 116 | 92 | 163 | 155 | 79 | 235 | 236 | 167 | 123 | 112 | 78 | 54 | |
Swell 2 Height (m) Direction Period (s) | WNW 10 | WNW 9 | NW 9 | WNW 9 | NW 9 | NW 10 | NW 10 | NW 9 | E 9 | E 8 | SE 7 | ENE 8 | ENE 8 | N 13 | ENE 8 | ENE 8 | SE 9 | SE 9 | E 8 | E 8 | SE 9 |
64 | 58 | 42 | 31 | 23 | 49 | 46 | 28 | 39 | 36 | 22 | 22 | 22 | 121 | 21 | 12 | 12 | 13 | 11 | 12 | 13 | |
Swell 3 Height (m) Direction Period (s) | SE 11 | SE 10 | SE 10 | SE 10 | NW 8 | NE 9 | NE 9 | NE 9 | NW 8 | NW 8 | N 10 | SE 6 | SE 6 | E 8 | SE 9 | SE 9 | S 6 | E 8 | ESE 10 | SE 9 | E 8 |
18 | 16 | 15 | 15 | 17 | 19 | 20 | 19 | 17 | 16 | 48 | 14 | 10 | 32 | 20 | 12 | 3 | 11 | 9 | 13 | 12 | |
Wind waves Height (m) Direction Period (s) | — | — | E 4 | ESE 4 | SE 7 | ESE 7 | SE 7 | ESE 7 | ESE 7 | SE 7 | — | — | ESE 4 | ESE 8 | E 3 | E 4 | E 8 | E 5 | ESE 5 | E 5 | E 4 |
— | — | 6 | 4 | 27 | 35 | 44 | 36 | 35 | 38 | — | — | 3 | 26 | 5 | 15 | 60 | 21 | 19 | 21 | 12 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 20 | 20 | 20 | 20 | 0 | 0 | 20 | 0 | 0 | 0 | 0 | 0 | 0 | 1271 | 0 | 20 | 1284 | 0 | 20 | 1284 |
Best forecast wave conditions in Guam | |||||||||||||||||||||
Best forecast wave conditions in Guam | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
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Information about the Umatac Surf forecast
The above surf forecast table for Umatac provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Umatac can be found by selecting the local surf guide option on the grey menu. Our Umatac surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Umatac) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Umatac may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Umatac is 22 km (14 miles) from Agana. If you plan a holiday in Guam, look for hotels and other accommodation in Agana. Agana has rooms for a wide range of budgets as well as car hire and transport links.











