Surf Forecasts:
How big are the waves at Threes today (21 Sep):
- Morning surf: Morning surf (21 Sep, local time) - 2.5ft (0.8m), 10s period with NNW swell.
- Afternoon surf: Afternoon surf (21 Sep, local time) - 2.5ft (0.8m), 12s period with NE swell.
- Evening surf: Evening surf (21 Sep, local time) - 2.5ft (0.8m), 11s period with NE swell.
The current surf forecast for Threes at 2PM is: 0.8m 10s primary swell from a North-northwest direction and 0.9m 7s secondary swell from a Southwest direction (forecast issued at 09:00am September 21). An open ocean swell of 0.3m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Sep) | 2.5ft (0.8m) | 10s |
| Afternoon (21 Sep) | 2.5ft (0.8m) | 12s |
| Evening (21 Sep) | 2.5ft (0.8m) | 11s |
Table - waves today at Threes. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 65mm), heaviest during Tue night. Warm (max 28°C on Mon morning, min 26°C on Tue morning). Winds increasing (calm on Mon morning, strong winds from the SE by Tue morning). | ||||||||||||||||||||||
Monday 21 | Tuesday 22 | Wednesday 23 | ||||||||||||||||||||
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) | NNW 10 | NNW 10 | NNW 10 | NE 12 | NE 12 | NE 11 | NE 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 12 | NNW 12 | NNW 12 | NNW 12 | NNW 12 | NNW 12 | NNW 12 | SW 7 | SW 7 |
Wave Graph  | ||||||||||||||||||||||
 kJ | 118 | 116 | 111 | 167 | 161 | 142 | 140 | 114 | 94 | 94 | 94 | 94 | 94 | 125 | 169 | 190 | 187 | 184 | 180 | 158 | 331 | 258 |
Wind (km/h) | ||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | cross-off | cross-off | off | off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | cross-off | cross | cross |
High Tide | 5:21PM0.64m | 3:07AM0.59m | 5:55PM0.67m | 4:15AM0.61m | 6:23PM0.69m | |||||||||||||||||
Low Tide | 9:36AM0.08m | 10:37PM0.48m | 10:31AM0.05m | 11:21PM0.43m | 11:18AM0.04m | |||||||||||||||||
 | | |  |  | |  |  | | | | | | | |  |  | | | | | | |
 | 6:09 | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — |
 | — | — | — | 6:17 | — | — | — | — | — | — | — | 6:17 | — | — | — | — | — | — | — | 6:16 | — | — |
mm | 2 | 3 | 1 | — | — | — | — | 1 | 2 | 3 | 5 | 5 | 3 | 3 | 4 | 7 | 6 | 2 | 1 | 3 | 1 | 1 |
Temp °C | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 26 | 26 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 |
Feels °C | 33 | 33 | 31 | 30 | 30 | 29 | 27 | 25 | 24 | 23 | 25 | 26 | 28 | 27 | 27 | 27 | 26 | 28 | 28 | 30 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | NE 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | SSW 8 | NNW 12 | NNW 12 | NNW 12 | NNW 12 | NNW 12 | NNW 12 | NNW 12 | NNW 11 | SW 7 |
| kJ | 118 | 104 | 102 | 82 | 69 | 55 | 140 | 114 | 94 | 94 | 94 | 94 | 438 | 125 | 169 | 190 | 187 | 184 | 180 | 158 | 148 | 258 |
Swell 2 Height (m) Direction Period (s) | NNW 10 | NNW 10 | NNW 10 | NE 12 | NE 12 | NE 11 | WSW 7 | NE 11 | NE 11 | NE 10 | NE 10 | NE 10 | NNW 10 | NE 10 | NE 10 | WSW 8 | WSW 7 | NE 9 | NE 9 | NE 9 | NE 9 | NNW 11 |
| kJ | 114 | 116 | 111 | 167 | 161 | 142 | 41 | 119 | 117 | 89 | 82 | 80 | 94 | 77 | 47 | 44 | 57 | 43 | 41 | 41 | 41 | 140 |
Swell 3 Height (m) Direction Period (s) | NE 10 | NE 10 | NE 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | WSW 7 | WSW 7 | WSW 7 | E 13 | E 13 | NE 10 | SE 8 | E 13 | NE 10 | NE 10 | SE 8 | SE 8 | SE 8 | SE 8 | NE 9 |
| kJ | 100 | 100 | 79 | 86 | 85 | 81 | 61 | 31 | 19 | 18 | 3 | 3 | 79 | 32 | 3 | 46 | 46 | 32 | 32 | 22 | 29 | 42 |
Wind waves Height (m) Direction Period (s) | — | — | SSE 6 | — | SSE 8 | SE 8 | SSE 5 | SE 6 | SE 7 | SSE 8 | S 8 | S 8 | SSE 8 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SW 7 | SW 7 | — |
| kJ | — | — | 6 | — | 58 | 104 | 106 | 176 | 853 | 887 | 665 | 579 | 43 | 355 | 355 | 293 | 335 | 412 | 395 | 383 | 331 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 13 | 0 | 0 | 1270 | 1270 | 1810 | 1810 | 1885 | 1270 | 1270 | 1270 | 1270 | 1270 | 1270 | 1810 | 255 | 255 | 255 | 1270 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||
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