Surf Forecasts:
How big are the waves at Boat Basin Lefts today (20 Oct):
- Morning surf: Morning surf (20 Oct, local time) - 2.5ft (0.7m), 9s period with ENE swell.
- Afternoon surf: Afternoon surf (20 Oct, local time) - 3.5ft (1.0m), 11s period with W swell.
- Evening surf: Evening surf (20 Oct, local time) - 2.5ft (0.7m), 9s period with NE swell.
The current surf forecast for Boat Basin Lefts at 5AM is: 0.7m 11s primary swell from a West direction and 0.7m 9s secondary swell from a East-northeast direction (forecast issued at 09:00pm October 19). An open ocean swell of 1.4m 9s is not directed at the surf break, a second open ocean swell of 1.3m 8s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Oct) | 2.5ft (0.7m) | 9s |
| Afternoon (20 Oct) | 3.5ft (1.0m) | 11s |
| Evening (20 Oct) | 2.5ft (0.7m) | 9s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 2mm), mostly falling on Mon night. Warm (max 28°C on Tue morning, min 25°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Mon 19 | Tuesday 20 | Wednesday 21 | ||||||||||||||||
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) | ENE 9 | ENE 9 | W 11 | W 11 | ENE 9 | ENE 9 | W 11 | W 11 | W 11 | NE 9 | NE 8 | NE 9 | W 11 | NE 8 | ENE 8 | ENE 9 | WNW 12 | WNW 11 |
Wave Graph  | ||||||||||||||||||
 kJ | 70 | 70 | 116 | 114 | 70 | 70 | 242 | 250 | 119 | 75 | 74 | 125 | 119 | 102 | 150 | 154 | 179 | 217 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross | cross | cross |
High Tide | 00:16AM0.70m | 4:25PM0.80m | 2:04AM0.68m | 4:53PM0.82m | ||||||||||||||
Low Tide | 9:06PM0.67m | 8:25AM0.30m | 10:12PM0.63m | 9:24AM0.33m | ||||||||||||||
 | |  | |  |  | | | | |  | | | | | | | | |
 | — | — | — | 6:11 | — | — | — | — | — | — | — | 6:11 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 5:59 | — | — | — | — | — | — | — | 5:58 | — | — |
mm | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 27 | 26 | 26 | 28 | 28 | 28 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 26 | 26 |
Feels °C | 27 | 28 | 30 | 29 | 29 | 31 | 31 | 31 | 30 | 30 | 31 | 30 | 30 | 30 | 29 | 29 | 29 | 30 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | WSW 10 | SW 9 | SW 11 | SW 11 | SSW 9 | SW 9 | SW 9 | SW 9 | SW 9 | SW 9 | SW 9 | WSW 9 | ENE 8 | ENE 9 | ENE 9 | ENE 9 |
| kJ | 466 | 377 | 307 | 335 | 1054 | 891 | 346 | 230 | 294 | 284 | 242 | 206 | 186 | 168 | 150 | 154 | 144 | 161 |
Swell 2 Height (m) Direction Period (s) | WSW 10 | WSW 10 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | W 11 | W 11 | W 11 | NE 9 | NE 8 | NE 9 | NE 8 | NE 8 | WSW 9 | WSW 9 | WSW 9 | WNW 11 |
| kJ | 267 | 256 | 70 | 70 | 70 | 70 | 242 | 250 | 119 | 75 | 74 | 107 | 105 | 102 | 154 | 124 | 111 | 217 |
Swell 3 Height (m) Direction Period (s) | ENE 9 | ENE 9 | W 11 | W 11 | SE 10 | SE 10 | ENE 9 | ENE 9 | ENE 9 | SE 10 | W 11 | W 11 | W 11 | W 11 | W 11 | WNW 11 | WNW 12 | WSW 9 |
| kJ | 70 | 70 | 116 | 114 | 24 | 47 | 70 | 70 | 68 | 46 | 61 | 125 | 119 | 86 | 85 | 123 | 179 | 111 |
Wind waves Height (m) Direction Period (s) | S 8 | S 8 | SSE 8 | SSE 8 | SE 7 | ESE 7 | SE 6 | — | — | — | — | — | — | NE 2 | — | — | — | — |
| kJ | 572 | 476 | 302 | 173 | 44 | 29 | 19 | — | — | — | — | — | — | 2 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 3 | 0 | 15 | 0 | 1 | 20 | 15 | 0 | 0 | 0 | 0 | 20 | 20 | 1836 | 1905 | 1864 | 1864 | 1290 |
Best forecast wave conditions in Guam | ||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||
Header Global | ||||||||||||||||||
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