Surf Forecasts:
How big are the waves at Boat Basin Lefts today (31 Jul):
- Morning surf: Morning surf (31 Jul, local time) - 1.5ft (0.4m), 8s period with ENE swell.
- Afternoon surf: Afternoon surf (31 Jul, local time) - 1.5ft (0.4m), 18s period with ENE swell.
- Evening surf: Evening surf (31 Jul, local time) - 2.5ft (0.8m), 16s period with E swell.
The current surf forecast for Boat Basin Lefts at 2AM is: 0.4m 8s primary swell from a East-northeast direction (forecast issued at 09:00pm July 30). An open ocean swell of 0.6m 7s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 Jul) | 1.5ft (0.4m) | 8s |
| Afternoon (31 Jul) | 1.5ft (0.4m) | 18s |
| Evening (31 Jul) | 2.5ft (0.8m) | 16s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 36mm), heaviest during Fri night. Warm (max 29°C on Fri morning, min 28°C on Thu night). Winds increasing (calm on Thu night, fresh winds from the WSW by Sun morning). | ||||||||||||||||||
Thu 30 | Friday 31 | Saturday 1 | ||||||||||||||||
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 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 15 | ENE 18 | E 17 | ENE 16 | E 15 | E 15 | E 14 | E 14 | E 14 | ENE 14 | ENE 14 | ENE 15 |
Wave Graph  | ||||||||||||||||||
 kJ | 28 | 28 | 27 | 26 | 26 | 22 | 42 | 102 | 142 | 416 | 447 | 619 | 713 | 713 | 684 | 704 | 580 | 806 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 9:40PM0.86m | 7:39AM0.85m | 10:03PM0.88m | 8:26AM0.83m | ||||||||||||||
Low Tide | 2:45AM0.63m | 2:52PM0.14m | 3:26AM0.59m | 3:25PM0.19m | ||||||||||||||
 | | |  |  | |  | | | | | | | | | | | | |
 | — | — | — | 6:05 | — | — | — | — | — | — | — | 6:05 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 6:49 | — | — | — | — | — | — | — | 6:49 | — | — |
mm | 2 | 1 | 1 | — | — | — | 1 | 2 | 3 | 4 | 1 | 1 | 1 | 1 | 3 | 2 | 1 | 1 |
Temp °C | 29 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 28 |
Feels °C | 34 | 33 | 33 | 32 | 32 | 31 | 31 | 31 | 30 | 31 | 30 | 30 | 30 | 32 | 31 | 30 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | SW 6 | SW 6 | SW 7 | SW 7 | ENE 8 | ENE 8 | ENE 8 | SW 7 | SW 7 | SW 7 | E 15 | E 14 | E 14 | E 14 | ENE 14 | ENE 14 | ENE 15 |
| kJ | 28 | 19 | 34 | 36 | 44 | 22 | 22 | 22 | 99 | 131 | 121 | 619 | 713 | 713 | 684 | 704 | 580 | 806 |
Swell 2 Height (m) Direction Period (s) | SW 6 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | SSE 6 | ENE 15 | ENE 18 | E 17 | ENE 16 | E 15 | SE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | SE 9 | SE 9 |
| kJ | 10 | 28 | 27 | 26 | 26 | 6 | 42 | 102 | 142 | 416 | 447 | 13 | 16 | 17 | 17 | 17 | 12 | 12 |
Swell 3 Height (m) Direction Period (s) | S 7 | SE 8 | SE 8 | SE 8 | SE 8 | NNE 9 | NNE 9 | ENE 11 | ENE 8 | NNE 9 | ENE 19 | NNE 9 | SE 9 | SE 9 | SE 9 | SE 9 | NNE 9 | NNE 9 |
| kJ | 15 | 17 | 17 | 17 | 17 | 17 | 17 | 25 | 22 | 16 | 119 | 16 | 13 | 13 | 12 | 12 | 16 | 16 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | — | SW 7 | SW 7 | SW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 |
| kJ | — | — | — | — | 86 | 63 | 75 | 97 | 178 | — | 173 | 143 | 147 | 173 | 196 | 222 | 222 | 228 |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 11 | 11 | 11 | 11 | 11 | 229 | 16 | 16 | 16 | 11 | 11 | 11 | 11 | 11 | 16 | 1910 | 1905 | 1864 |
Best forecast wave conditions in Guam | ||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||
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