Surf Forecasts:
How big are the waves at Boat Basin Lefts today (21 Oct):
- Morning surf: Morning surf (21 Oct, local time) - 2.5ft (0.8m), 12s period with WNW swell.
- Afternoon surf: Afternoon surf (21 Oct, local time) - 3.5ft (1.0m), 8s period with ENE swell.
- Evening surf: Evening surf (21 Oct, local time) - 3.5ft (1.0m), 9s period with ENE swell.
The current surf forecast for Boat Basin Lefts at 6AM is: 0.7m 12s primary swell from a West direction and 0.9m 9s secondary swell from a Northeast direction (forecast issued at 03:00am October 21). An open ocean swell of 1.1m 9s is not directed at the surf break, a second open ocean swell of 0.2m 2s 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 Oct) | 2.5ft (0.8m) | 12s |
| Afternoon (21 Oct) | 3.5ft (1.0m) | 8s |
| Evening (21 Oct) | 3.5ft (1.0m) | 9s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 3mm), mostly falling on Thu morning. Warm (max 28°C on Wed morning, min 26°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||||
Wednesday 21 | Thursday 22 | Friday 23 | ||||||||||||||||||||||
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) | NE 8 | W 11 | W 12 | WNW 12 | WNW 11 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | WNW 12 | WNW 12 | ENE 9 | ENE 9 | W 12 | W 12 | W 12 | ENE 9 | ENE 9 | ENE 9 | W 13 | W 13 | W 12 | WNW 13 | WNW 13 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 74 | 127 | 169 | 183 | 130 | 150 | 116 | 151 | 176 | 232 | 224 | 252 | 252 | 316 | 327 | 322 | 316 | 316 | 377 | 389 | 389 | 383 | 424 | 507 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross | cross | cross | cross-off | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 2:04AM0.68m | 4:53PM0.82m | 3:43AM0.70m | 5:16PM0.84m | 5:02AM0.74m | 5:37PM0.86m | ||||||||||||||||||
Low Tide | 10:12PM0.63m | 9:24AM0.33m | 10:55PM0.57m | 10:18AM0.35m | 11:30PM0.48m | 11:08AM0.39m | ||||||||||||||||||
 |  |  |  | | | | | | | | |  | |  | | | | | | | | | | |
 | — | 6:11 | — | — | — | — | — | — | — | 6:11 | — | — | — | — | — | — | — | 6:11 | — | — | — | — | — | — |
 | — | — | — | — | — | 5:58 | — | — | — | — | — | — | — | 5:58 | — | — | — | — | — | — | — | 5:57 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | 1 | — | — | 1 | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 28 | 28 | 28 | 27 | 26 | 26 | 26 | 26 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 27 |
Feels °C | 31 | 30 | 29 | 31 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 30 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | SW 9 | SW 9 | SW 9 | WSW 9 | WSW 9 | ENE 8 | ENE 9 | WSW 9 | WSW 9 | WNW 12 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | W 12 | W 11 | W 12 | W 12 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 |
| kJ | 211 | 211 | 194 | 172 | 172 | 150 | 116 | 124 | 108 | 232 | 197 | 252 | 252 | 252 | 252 | 322 | 257 | 280 | 377 | 324 | 293 | 273 | 244 | 244 |
Swell 2 Height (m) Direction Period (s) | NE 8 | ENE 9 | NE 9 | ENE 8 | ENE 8 | WSW 9 | WSW 9 | W 11 | WNW 11 | WSW 9 | WNW 12 | WNW 11 | WNW 11 | W 12 | W 12 | SE 9 | SE 9 | SE 9 | SE 9 | W 13 | W 13 | W 12 | WNW 13 | WNW 13 |
| kJ | 74 | 94 | 107 | 126 | 113 | 158 | 116 | 119 | 164 | 86 | 224 | 213 | 213 | 316 | 327 | 13 | 13 | 13 | 13 | 389 | 389 | 383 | 424 | 507 |
Swell 3 Height (m) Direction Period (s) | W 11 | W 11 | W 12 | WNW 12 | WNW 11 | W 11 | NNE 9 | NNE 10 | NNE 9 | NNE 8 | WSW 9 | WSW 9 | WSW 9 | SE 10 | SE 9 | N 11 | N 11 | N 11 | N 11 | SE 9 | SE 9 | ESE 9 | SE 9 | SE 9 |
| kJ | 63 | 127 | 169 | 183 | 130 | 86 | 66 | 74 | 65 | 57 | 79 | 61 | 62 | 23 | 22 | 10 | 9 | 9 | 9 | 14 | 22 | 8 | 14 | 13 |
Wind waves Height (m) Direction Period (s) | — | — | ENE 2 | ENE 3 | ENE 3 | — | ENE 3 | ENE 9 | ENE 9 | ENE 9 | — | — | — | — | — | ENE 9 | ENE 9 | ENE 9 | ENE 9 | — | — | — | — | — |
| kJ | — | — | 1 | 1 | 3 | — | 4 | 151 | 176 | 194 | — | — | — | — | — | 286 | 316 | 316 | 324 | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 1836 | 1908 | 1864 | 1290 | 1304 | 1304 | 1304 | 1304 | 1304 | 1304 | 1304 | 0 | 1304 | 0 | 0 | 1304 | 1373 | 1373 | 1373 | 0 | 0 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
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