- Forecast
- Maps
- Live
- Weather State
- Spot Information
Surf Forecasts:
Threes surfForecast / Guam / Guam
48hr Weather and Surf, issued 3 am Thursday 21 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 8AM is: 0.1m 10s primary swell from a Northeast direction (forecast issued at 03:00am May 21). An open ocean swell of 0.1m 9s is not directed at the surf break, a second 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 (21 May) | 0.5ft (0.1m) | 10s |
| Afternoon (21 May) | 0.5ft (0.1m) | 12s |
| Evening (21 May) | 0.5ft (0.1m) | 12s |
Table - waves today at Threes. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 27mm), heaviest during Sat morning. Warm (max 28°C on Thu morning, min 27°C on Thu afternoon). Mainly fresh winds. | ||||||||||||||||||||||||
Thursday 21 | Friday 22 | Saturday 23 | ||||||||||||||||||||||
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 10 | NE 10 | N 13 | NE 9 | NE 12 | NE 12 | N 12 | NE 12 | NE 11 | NE 11 | NE 11 | NNE 11 | NNE 11 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 9 | NE 9 | NNE 9 | NNE 9 | |
2 | 4 | 4 | 3 | 6 | 6 | 3 | 6 | 5 | 5 | 5 | 11 | 11 | 10 | 9 | 10 | 10 | 9 | 9 | 9 | 8 | 3 | 8 | 8 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | 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 | cross-off | cross-off | cross-off | off | |
High Tide | 00:09AM0.77m | 9:37AM0.71m | 1:07AM0.76m | 10:41AM0.65m | 2:01AM0.75m | 12:03PM0.58m | ||||||||||||||||||
Low Tide | 5:07AM0.54m | 5:19PM-0.16m | 6:24AM0.52m | 6:17PM-0.08m | 7:46AM0.46m | 7:17PM0.02m | ||||||||||||||||||
 |  |  |  | | |  | | | | | |  | | | | | | | | |  |  | | |
 | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:40 | — | — | — | — | — | — | — | 6:40 | — | — | — | — | — | — | — | 6:40 | — | — |
— | — | — | — | — | — | 1 | 1 | 1 | 1 | — | — | 1 | 1 | — | 1 | — | 2 | 2 | 4 | 3 | — | — | — | |
Temp °C | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 |
26 | 27 | 27 | 28 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 28 | |
Swell 1 Height (m) Direction Period (s) | 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 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 9 | NE 9 | NNE 9 | NNE 9 |
 kJ | 2 | 4 | 4 | 3 | 2 | 3 | 3 | 3 | 6 | 5 | 5 | 11 | 11 | 10 | 9 | 10 | 10 | 9 | 9 | 9 | 8 | 3 | 8 | 8 |
Swell 2 Height (m) Direction Period (s) | S 9 | S 9 | S 9 | S 9 | NE 12 | NE 12 | N 12 | NE 12 | NE 11 | SE 12 | N 9 | NNE 11 | — | — | S 11 | S 11 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | S 12 |
| kJ | 2 | 2 | 2 | 2 | 6 | 6 | 3 | 6 | 5 | 6 | 1 | 11 | — | — | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | N 13 | — | S 9 | S 9 | S 8 | S 8 | N 9 | N 9 | N 9 | — | — | — | — | — | — | — | — | — | — | E 16 | E 16 | E 16 |
| kJ | — | — | 3 | — | 2 | 2 | 1 | 1 | 2 | 1 | 2 | — | — | — | — | — | — | — | — | — | — | 5 | 5 | 5 |
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 | 683 | 683 | 699 | 699 | 635 | 588 | 580 | 521 | 465 | 465 | 465 | 413 | 404 | 452 | 452 | 452 | 455 | 455 | 455 | 399 | 408 | 465 | 455 | 498 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1810 | 1810 | 1810 | 1810 | 1838 | 1886 | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1838 | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1810 | 1838 | 1838 | 1833 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
- Map Icons:
Break
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 Threes 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.
Nearest