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 4PM is: 1.0m 11s primary swell from a West direction (forecast issued at 09:00am October 20). An open ocean swell of 1.2m 9s 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 (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 Tue night. Warm (max 28°C on Tue morning, min 25°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||
Tuesday 20 | Wednesday 21 | Thursday 22 | ||||||||||||||||||||
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) | ENE 9 | ENE 9 | W 11 | W 11 | W 11 | NE 9 | ENE 8 | W 11 | W 12 | WNW 12 | WNW 11 | W 11 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | W 11 | WNW 12 | WNW 12 | W 12 | W 12 | W 12 |
Wave Graph  | ||||||||||||||||||||||
 kJ | 70 | 70 | 242 | 250 | 89 | 75 | 92 | 127 | 169 | 183 | 130 | 126 | 147 | 161 | 164 | 205 | 256 | 349 | 373 | 347 | 403 | 403 |
Wind (km/h) | ||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-off |
High Tide | 4:25PM0.80m | 2:04AM0.68m | 4:53PM0.82m | 3:43AM0.70m | 5:16PM0.84m | |||||||||||||||||
Low Tide | 8:25AM0.30m | 10:12PM0.63m | 9:24AM0.33m | 10:55PM0.57m | 10:18AM0.35m | |||||||||||||||||
 | | | |  | | | |  |  | | | | | | | | | | | | | |
 | 6:11 | — | — | — | — | — | — | 6:11 | — | — | — | — | — | — | — | 6:11 | — | — | — | — | — | — |
 | — | — | — | 5:59 | — | — | — | — | — | — | — | 5:58 | — | — | — | — | — | — | — | 5:58 | — | — |
mm | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 27 | 28 | 28 | 28 | 27 | 26 | 26 | 26 | 26 | 27 | 28 | 27 | 26 | 26 | 26 | 26 | 25 | 27 | 28 | 27 | 26 | 26 |
Feels °C | 31 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 28 | 29 | 30 | 29 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | SW 11 | SW 11 | SSW 9 | SW 9 | SW 9 | SW 9 | SW 9 | SW 9 | SW 9 | WSW 9 | WSW 9 | WSW 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | NE 9 | NE 9 | NE 9 | NE 9 | ENE 9 |
| kJ | 1054 | 891 | 339 | 230 | 347 | 278 | 211 | 211 | 194 | 172 | 172 | 158 | 147 | 151 | 161 | 190 | 197 | 226 | 226 | 226 | 226 | 238 |
Swell 2 Height (m) Direction Period (s) | ENE 9 | ENE 9 | W 11 | W 11 | ENE 9 | NE 9 | ENE 8 | ENE 9 | NE 9 | ENE 8 | ENE 8 | ENE 8 | WSW 9 | WSW 9 | WSW 9 | WNW 11 | W 11 | WNW 12 | WNW 12 | W 12 | W 12 | W 12 |
| kJ | 70 | 70 | 242 | 250 | 68 | 75 | 92 | 94 | 107 | 126 | 113 | 126 | 154 | 111 | 108 | 205 | 256 | 349 | 373 | 347 | 403 | 403 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | ENE 9 | ENE 9 | W 11 | SE 10 | W 11 | W 11 | W 12 | WNW 12 | WNW 11 | W 11 | W 11 | WNW 11 | WNW 11 | WSW 9 | WSW 9 | WSW 9 | WSW 9 | WSW 8 | SE 9 | SE 9 |
| kJ | 24 | 47 | 70 | 70 | 89 | 46 | 63 | 127 | 169 | 183 | 130 | 116 | 85 | 161 | 164 | 86 | 86 | 61 | 61 | 37 | 21 | 13 |
Wind waves Height (m) Direction Period (s) | — | ESE 7 | — | — | — | — | — | — | — | ENE 2 | ENE 3 | ENE 3 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 29 | — | — | — | — | — | — | — | 1 | 3 | 3 | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||
Distance (km) | 0 | 20 | 0 | 0 | 0 | 0 | 20 | 20 | 0 | 1836 | 1908 | 1864 | 1864 | 1304 | 1304 | 1304 | 1304 | 1304 | 1304 | 1304 | 1290 | 0 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||
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