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Surf Forecasts:
Threes surfForecast / Guam / Guam
48hr Weather and Surf, issued 9 am Sunday 31 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
28.7° C
(Which is normal for this time of year)How big are the waves at Threes today (31 May):
- Morning surf: Morning surf (31 May, local time) - 2.5ft (0.8m), 8s period with SW swell.
- Afternoon surf: Afternoon surf (31 May, local time) - 2.5ft (0.7m), 9s period with W swell.
- Evening surf: Evening surf (31 May, local time) - 2.5ft (0.8m), 10s period with W swell.
The current surf forecast for Threes at 1PM is: 0.8m 8s primary swell from a Southwest direction and 0.6m 9s secondary swell from a West direction (forecast issued at 09:00am May 31). An open ocean swell of 1.1m 10s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 May) | 2.5ft (0.8m) | 8s |
| Afternoon (31 May) | 2.5ft (0.7m) | 9s |
| Evening (31 May) | 2.5ft (0.8m) | 10s |
Table - waves today at Threes. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 28°C on Sun morning, min 27°C on Sun night). Wind will be generally light. | ||||||||||||||||||||||||
Sunday 31 | Monday 1 | Tuesday 2 | Wed 3 | |||||||||||||||||||||
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 | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SW 8 | SW 8 | SW 8 | W 9 | W 9 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | W 10 | |
80 | 80 | 78 | 80 | 81 | 122 | 125 | 125 | 122 | 92 | 125 | 162 | 175 | 141 | 108 | 102 | 102 | 75 | 75 | 78 | 82 | 78 | 82 | 49 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | off | off | off | off | cross-off | cross-off | |
High Tide | 6:28AM0.69m | 9:21PM0.69m | 6:56AM0.69m | 10:00PM0.70m | 7:25AM0.68m | 10:38PM0.70m | ||||||||||||||||||
Low Tide | 1:53PM-0.08m | 2:11AM0.50m | 2:26PM-0.09m | 2:49AM0.52m | 2:59PM-0.09m | 3:27AM0.53m | ||||||||||||||||||
 | | | |  | | | | | | |  | | | | | | | | | |  | | | |
 | 5:52 | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 |
 | — | — | — | 6:44 | — | — | — | — | — | — | — | 6:44 | — | — | — | — | — | — | — | 6:45 | — | — | — | 6:45 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 27 |
29 | 29 | 29 | 29 | 30 | 29 | 28 | 28 | 28 | 29 | 29 | 29 | 30 | 31 | 29 | 30 | 30 | 31 | 31 | 31 | 31 | 32 | 30 | 30 | |
Swell 1 Height (m) Direction Period (s) | SW 8 | E 10 | SW 8 | SW 8 | W 9 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | WNW 10 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 |
 kJ | 80 | 122 | 78 | 67 | 81 | 122 | 125 | 125 | 122 | 92 | 125 | 162 | 175 | 141 | 108 | 198 | 164 | 164 | 164 | 164 | 164 | 164 | 133 | 133 |
Swell 2 Height (m) Direction Period (s) | W 8 | SW 8 | W 9 | W 9 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | E 10 | E 9 | E 9 | E 9 | WSW 8 | WSW 8 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | W 10 |
| kJ | 49 | 80 | 57 | 80 | 51 | 51 | 31 | 29 | 28 | 67 | 64 | 63 | 61 | 25 | 23 | 102 | 102 | 75 | 75 | 78 | 82 | 78 | 82 | 48 |
Swell 3 Height (m) Direction Period (s) | NNE 11 | W 9 | NNE 12 | NNE 12 | NE 11 | NE 11 | NE 11 | NE 11 | NE 11 | WSW 7 | SW 7 | NE 11 | NE 11 | NE 11 | NE 11 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | SW 7 | WSW 7 | WSW 7 | WSW 7 | WNW 11 |
| kJ | 50 | 55 | 53 | 52 | 32 | 31 | 31 | 31 | 30 | 21 | 14 | 30 | 29 | 29 | 29 | 22 | 22 | 24 | 23 | 14 | 11 | 10 | 10 | 49 |
Wind waves Height (m) Direction Period (s) | E 10 | E 4 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 6 | E 6 | E 6 | E 6 | E 9 | E 9 | — | — | — | — | — | — | — | — | — |
| kJ | 194 | 18 | 230 | 230 | 230 | 273 | 268 | 268 | 262 | 81 | 98 | 80 | 83 | 198 | 198 | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1352 | 9 | 0 | 1270 | 1270 | 1270 | 1270 | 1270 | 1270 | 1352 | 1284 | 1352 | 1352 | 25 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
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