Surf Forecasts:
How big are the waves at Threes today (20 Sep):
- Morning surf: Morning surf (20 Sep, local time) - 4ft (1.2m), 8s period with SW swell.
- Afternoon surf: Afternoon surf (20 Sep, local time) - 4ft (1.2m), 8s period with WSW swell.
- Evening surf: Evening surf (20 Sep, local time) - 4ft (1.2m), 8s period with SW swell.
The current surf forecast for Threes at 7AM is: 1.3m 8s primary swell from a Southwest direction and 0.7m 8s secondary swell from a North-northwest direction (forecast issued at 03:00am September 20). The wind direction is predicted to be onshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Sep) | 4ft (1.2m) | 8s |
| Afternoon (20 Sep) | 4ft (1.2m) | 8s |
| Evening (20 Sep) | 4ft (1.2m) | 8s |
Table - waves today at Threes. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 38mm), heaviest during Sun night. Warm (max 29°C on Sun morning, min 25°C on Mon morning). Winds increasing (calm on Mon morning, fresh winds from the SE by Tue morning). | ||||||||||||||||||||||||
Sunday 20 | Monday 21 | Tuesday 22 | ||||||||||||||||||||||
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 |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | SW 8 | SW 8 | SW 8 | SW 8 | WSW 8 | SW 8 | NNW 10 | SW 8 | SW 8 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NE 12 | NE 12 | NE 11 | NE 11 | NE 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 13 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 232 | 232 | 201 | 178 | 158 | 139 | 147 | 160 | 141 | 137 | 118 | 116 | 111 | 167 | 161 | 142 | 140 | 140 | 92 | 133 | 118 | 135 | 94 | 269 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | cross-on | cross-on | cross-on | on | cross-on | on | glassy | cross-off | cross-on | glassy | cross | cross | cross-off | cross-off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off |
High Tide | 00:23AM0.59m | 4:36PM0.62m | 1:45AM0.58m | 5:21PM0.64m | 3:07AM0.59m | 5:55PM0.67m | ||||||||||||||||||
Low Tide | 8:32AM0.09m | 9:34PM0.51m | 9:36AM0.08m | 10:37PM0.48m | 10:31AM0.05m | |||||||||||||||||||
 |  |  | |  | | | |  | | |  |  | |  | | | | | | | | | | |
 | — | 6:09 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:19 | — | — | — | — | — | — | — | 6:17 | — | — | — | — | — | — | — | 6:17 | — | — |
mm | 2 | — | 1 | 1 | — | 3 | 2 | — | — | 6 | 2 | 6 | — | — | — | — | 1 | 2 | 1 | 2 | 2 | — | — | — |
Temp °C | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 25 | 27 | 28 | 28 | 28 | 27 | 27 | 28 | 28 | 27 | 28 | 27 | 27 |
Feels °C | 32 | 31 | 32 | 33 | 33 | 33 | 32 | 33 | 33 | 32 | 32 | 29 | 32 | 32 | 32 | 32 | 30 | 30 | 30 | 28 | 25 | 27 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SW 8 | SW 8 | SW 8 | WSW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | NNW 13 |
| kJ | 232 | 232 | 201 | 178 | 158 | 133 | 147 | 160 | 141 | 137 | 118 | 104 | 102 | 96 | 77 | 89 | 77 | 55 | 65 | 67 | 97 | 89 | 86 | 269 |
Swell 2 Height (m) Direction Period (s) | NNW 8 | NNW 8 | NNW 8 | NNW 9 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NE 12 | NE 12 | NE 11 | NE 11 | NNW 10 | NE 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | SW 7 |
| kJ | 70 | 72 | 73 | 82 | 150 | 139 | 143 | 111 | 111 | 111 | 114 | 116 | 111 | 167 | 161 | 142 | 140 | 111 | 117 | 133 | 118 | 135 | 94 | 79 |
Swell 3 Height (m) Direction Period (s) | SSE 8 | SE 8 | SE 8 | SE 8 | NE 11 | NE 11 | NE 11 | NE 10 | NE 10 | NE 10 | NE 10 | NE 10 | NE 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NE 11 | NNW 10 | NE 10 | NE 10 | NE 10 | NE 10 | NE 10 |
| kJ | 45 | 34 | 34 | 34 | 56 | 92 | 90 | 89 | 108 | 104 | 100 | 100 | 79 | 86 | 85 | 81 | 61 | 140 | 92 | 112 | 82 | 80 | 79 | 60 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SSE 8 | SE 5 | — | — | — | — | — | — | E 2 | E 3 | ESE 4 | SSE 5 | SSE 6 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 61 | 7 | — | — | — | — | — | — | 1 | 8 | 22 | 83 | 226 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 9 | 9 | 0 | 0 | 13 | 0 | 13 | 13 | 0 | 0 | 0 | 0 | 13 | 1885 | 1885 | 1270 | 1270 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
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