Surf Forecasts:
How big are the waves at Threes today (18 Sep):
- Morning surf: Morning surf (18 Sep, local time) - 5ft (1.6m), 8s period with SW swell.
- Afternoon surf: Afternoon surf (18 Sep, local time) - 5ft (1.6m), 8s period with SW swell.
- Evening surf: Evening surf (18 Sep, local time) - 5.5ft (1.7m), 8s period with SW swell.
The current surf forecast for Threes at 7AM is: 1.6m 8s primary swell from a Southwest direction and 0.7m 8s secondary swell from a North-northeast direction (forecast issued at 03:00am September 18). The wind direction is predicted to be cross-onshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Sep) | 5ft (1.6m) | 8s |
| Afternoon (18 Sep) | 5ft (1.6m) | 8s |
| Evening (18 Sep) | 5.5ft (1.7m) | 8s |
Table - waves today at Threes. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 25mm), heaviest during Sun night. Warm (max 29°C on Fri morning, min 28°C on Sat night). Wind will be generally light. | ||||||||||||||||||||||||
Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||||||||||
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 9 | SW 9 | SW 8 | SW 8 | SW 8 | WSW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | SW 8 | SW 8 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 351 | 393 | 346 | 367 | 358 | 315 | 392 | 380 | 363 | 380 | 380 | 358 | 281 | 254 | 254 | 202 | 202 | 202 | 197 | 162 | 145 | 158 | 140 | 140 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | glassy | glassy | glassy | glassy | glassy |
High Tide | 10:44PM0.64m | 2:06PM0.59m | 11:24PM0.61m | 3:31PM0.59m | 00:23AM0.59m | 4:36PM0.62m | ||||||||||||||||||
Low Tide | 6:21AM0.08m | 6:29PM0.50m | 7:24AM0.09m | 8:00PM0.52m | 8:32AM0.09m | 9:34PM0.51m | ||||||||||||||||||
 | |  | | |  |  | | | | | | | | | |  | |  |  | | |  | | |
 | — | 6:09 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:21 | — | — | — | — | — | — | — | 6:20 | — | — | — | — | — | — | — | 6:19 | — | — |
mm | 2 | 1 | 1 | 2 | 1 | — | — | — | — | — | 1 | 1 | 2 | 2 | 1 | 2 | — | 2 | — | — | 1 | 2 | — | 2 |
Temp °C | 29 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 29 | 29 | 29 | 29 | 29 |
Feels °C | 31 | 30 | 31 | 31 | 30 | 30 | 30 | 31 | 31 | 31 | 32 | 32 | 32 | 32 | 33 | 33 | 33 | 32 | 32 | 34 | 34 | 34 | 34 | 34 |
Swell 1 Height (m) Direction Period (s) | SW 9 | SW 9 | SW 8 | SW 8 | NNE 10 | S 7 | NNE 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | SW 8 | SW 8 |
| kJ | 351 | 393 | 346 | 367 | 51 | 33 | 37 | 380 | 363 | 380 | 380 | 358 | 281 | 254 | 254 | 202 | 202 | 202 | 197 | 162 | 145 | 158 | 140 | 140 |
Swell 2 Height (m) Direction Period (s) | NNE 9 | NNE 8 | NNE 8 | NNE 8 | SE 9 | NNE 8 | SE 9 | NNE 8 | SSE 6 | SE 8 | SE 8 | N 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | N 8 | SSE 8 | NNW 8 | NNW 9 | SSE 8 | NNW 9 | NNW 9 | NNW 9 |
| kJ | 86 | 64 | 62 | 62 | 21 | 38 | 37 | 34 | 22 | 35 | 34 | 32 | 46 | 75 | 56 | 67 | 50 | 64 | 55 | 58 | 68 | 86 | 86 | 65 |
Swell 3 Height (m) Direction Period (s) | SSE 7 | SSE 7 | SSE 7 | NE 11 | NE 11 | SE 9 | NE 11 | SE 8 | SSE 8 | N 8 | N 8 | SE 8 | N 8 | N 8 | N 8 | N 8 | SSE 8 | NNW 8 | SSE 8 | SSE 8 | NNW 9 | SSE 8 | NE 11 | NE 11 |
| kJ | 30 | 20 | 29 | 33 | 33 | 28 | 33 | 35 | 47 | 33 | 32 | 34 | 32 | 32 | 48 | 50 | 44 | 73 | 41 | 44 | 80 | 44 | 92 | 90 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SW 8 | WSW 8 | SW 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 358 | 315 | 392 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 15 | 15 | 1270 | 255 | 1889 | 255 | 15 | 15 | 15 | 15 | 15 | 14 | 15 | 15 | 14 | 14 | 15 | 14 | 15 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
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