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Surf Forecasts:
Threes surfForecast / Guam / Guam
48hr Weather and Surf, issued 9 pm Tuesday 19 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
28.8° C
(Which is normal for this time of year)How big are the waves at Threes today?
The current surf forecast for Threes at 2AM is: 0.1m 9s primary swell from a Northeast direction (forecast issued at 09:00pm May 19). An open ocean swell of 2.0m 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 (20 May) | 0.5ft (0.1m) | 11s |
| Afternoon (20 May) | 0.5ft (0.1m) | 11s |
| Evening (20 May) | 0.5ft (0.1m) | 10s |
Table - waves today at Threes. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 12mm), heaviest on Thu afternoon. Warm (max 28°C on Tue night, min 27°C on Wed night). Mainly fresh winds. | ||||||||||||||||||||||||
Tue 19 | Wednesday 20 | Thursday 21 | Friday 22 | |||||||||||||||||||||
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 | |
Swell Height Map |   |    |    |    | ||||||||||||||||||||
N 9 | N 9 | NE 9 | NE 9 | N 11 | N 11 | N 11 | N 11 | N 10 | NE 10 | N 10 | NE 10 | N 13 | NE 9 | NE 12 | NE 12 | N 12 | N 12 | NE 11 | NE 11 | NE 11 | NNE 11 | NNE 11 | E 9 | |
2 | 2 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 4 | 2 | 4 | 4 | 3 | 6 | 6 | 3 | 3 | 5 | 5 | 5 | 11 | 11 | 0 | |
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 | 11:09PM0.78m | 8:43AM0.76m | 00:09AM0.77m | 9:37AM0.71m | 1:07AM0.76m | 10:41AM0.65m | ||||||||||||||||||
Low Tide | 4:02AM0.54m | 4:23PM-0.22m | 5:07AM0.54m | 5:19PM-0.16m | 6:24AM0.52m | |||||||||||||||||||
 |  | | |  |  | | | | | |  |  | | | | | | | | | | | | |
 | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — |
 | — | — | — | — | — | — | — | 6:40 | — | — | — | — | — | — | — | 6:40 | — | — | — | — | — | — | — | 6:40 |
1 | — | 1 | — | — | 1 | 1 | 1 | 1 | — | — | — | — | 1 | 1 | 1 | 2 | 1 | — | — | — | — | — | 1 | |
Temp °C | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 |
29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 26 | 26 | 26 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 29 | 28 | 29 | 30 | 29 | |
Swell 1 Height (m) Direction Period (s) | N 9 | N 9 | NE 9 | NE 9 | NE 9 | N 11 | N 11 | N 11 | N 10 | NE 10 | N 10 | NE 10 | NE 10 | NE 9 | N 9 | NE 9 | NE 9 | NE 9 | SE 12 | NE 11 | NE 11 | NNE 11 | NNE 11 | — |
 kJ | 2 | 2 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 4 | 2 | 4 | 4 | 3 | 2 | 3 | 3 | 3 | 6 | 5 | 5 | 11 | 11 | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | N 11 | N 11 | N 11 | — | — | S 9 | S 9 | S 9 | S 9 | S 9 | NE 12 | NE 12 | N 12 | N 12 | NE 11 | SE 12 | N 9 | N 8 | — | — |
| kJ | — | — | — | — | 2 | 2 | 2 | — | — | 2 | 2 | 2 | 2 | 2 | 6 | 6 | 3 | 3 | 5 | 6 | 2 | 1 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | N 13 | — | S 9 | S 9 | S 8 | S 8 | N 9 | N 9 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | 2 | 2 | 1 | 1 | 1 | 2 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | 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 | E 9 | E 9 |
| kJ | 670 | 670 | 670 | 723 | 656 | 656 | 707 | 715 | 715 | 699 | 766 | 749 | 699 | 699 | 635 | 575 | 588 | 529 | 521 | 521 | 455 | 455 | 498 | 498 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1833 | 1838 | 1838 | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1833 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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