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Surf Forecasts:
Threes surfForecast / Guam / Guam
48hr Weather and Surf, issued 3 am Monday 18 May 2026 ChSTForecast update in hr min s Forecast update imminent
Threes surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Threes sea temperature is
28.9° C
(Which is normal for this time of year)How big are the waves at Threes today?
The current surf forecast for Threes at 9AM is: 0.2m 9s primary swell from a North direction (forecast issued at 03:00am May 18). An open ocean swell of 2.1m 9s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 0.5ft (0.2m) | 9s |
| Afternoon (18 May) | 0.5ft (0.1m) | 9s |
| Evening (18 May) | 0.5ft (0.2m) | 9s |
Table - waves today at Threes. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 2mm), mostly falling on Tue night. Warm (max 28°C on Mon morning, min 27°C on Mon afternoon). Mainly fresh winds. | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | ||||||||||||||||||||||
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 | 7 PM | 10 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
N 9 | N 9 | N 9 | N 9 | N 9 | N 9 | N 9 | N 9 | N 9 | N 9 | NE 9 | NE 9 | N 10 | N 10 | N 9 | N 9 | NE 9 | NE 9 | N 11 | N 11 | N 11 | N 11 | N 10 | N 10 | |
6 | 6 | 6 | 6 | 6 | 2 | 6 | 6 | 6 | 2 | 3 | 3 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 2 | 2 | 2 | |
Wind (km/h) | ||||||||||||||||||||||||
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 | 7:13AM0.79m | 10:10PM0.79m | 7:56AM0.78m | 11:09PM0.78m | 8:43AM0.76m | |||||||||||||||||||
Low Tide | 2:11AM0.48m | 2:40PM-0.25m | 3:04AM0.52m | 3:30PM-0.25m | 4:02AM0.54m | 4:23PM-0.22m | ||||||||||||||||||
 | |  | | |  | |  | | | | | | | |  | | | | | | | | | |
 | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:39 | — | — | — | — | — | — | — | 6:39 | — | — | — | — | — | — | — | 6:40 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | |
Temp °C | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 27 |
27 | 27 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 26 | 27 | 28 | 29 | 29 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 28 | |
Swell 1 Height (m) Direction Period (s) | N 9 | N 9 | N 9 | N 9 | N 9 | N 8 | N 9 | N 9 | N 9 | N 9 | NE 9 | NE 9 | N 10 | N 10 | N 9 | N 9 | NE 9 | NE 9 | NE 9 | N 11 | NE 9 | N 11 | N 10 | N 10 |
 kJ | 6 | 6 | 6 | 6 | 6 | 1 | 6 | 6 | 6 | 2 | 3 | 3 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 2 | 2 | 2 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | N 9 | N 8 | NE 9 | N 7 | N 7 | — | — | — | — | — | — | — | — | N 11 | N 11 | N 11 | — | — | S 9 |
| kJ | — | — | — | — | — | 2 | 1 | 3 | 1 | 1 | — | — | — | — | — | — | — | — | 2 | 2 | 2 | — | — | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 |
| kJ | 782 | 710 | 766 | 766 | 680 | 680 | 665 | 664 | 664 | 651 | 739 | 810 | 739 | 739 | 670 | 670 | 739 | 739 | 723 | 723 | 651 | 651 | 642 | 642 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1833 | 1810 | 1810 | 1810 | 1810 | 1887 | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1889 | 1813 | 1810 | 1270 | 1270 | 1270 | 1270 | 1270 | 1810 | 1810 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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