Surf Forecasts:
How big are the waves at Boat Basin Lefts today (31 Aug):
- Morning surf: Morning surf (31 Aug, local time) - 2.5ft (0.7m), 9s period with WNW swell.
- Afternoon surf: Afternoon surf (31 Aug, local time) - 3ft (0.9m), 10s period with WNW swell.
- Evening surf: Evening surf (31 Aug, local time) - 4ft (1.2m), 9s period with W swell.
The current surf forecast for Boat Basin Lefts at 6AM is: 0.9m 7s primary swell from a West direction and 0.5m 8s secondary swell from a West-northwest direction (forecast issued at 09:00pm August 30). The wind direction is predicted to be cross-onshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 Aug) | 2.5ft (0.7m) | 9s |
| Afternoon (31 Aug) | 3ft (0.9m) | 10s |
| Evening (31 Aug) | 4ft (1.2m) | 9s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 5mm), mostly falling on Sun night. Warm (max 29°C on Mon morning, min 27°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Sun 30 | Monday 31 | Tuesday 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) | W 8 | W 8 | W 8 | W 7 | W 7 | WNW 9 | WNW 9 | WNW 10 | WNW 9 | W 9 | WNW 9 | W 9 | W 9 | WNW 9 | WNW 9 | W 9 | W 10 | W 9 |
Wave Graph  | ||||||||||||||||||
 kJ | 117 | 138 | 114 | 107 | 88 | 70 | 121 | 166 | 153 | 230 | 169 | 219 | 257 | 211 | 211 | 327 | 398 | 425 |
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 | on | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off |
High Tide | 9:20PM0.89m | 9:29AM0.83m | 9:42PM0.89m | 10:27AM0.81m | ||||||||||||||
Low Tide | 3:34AM0.38m | 3:33PM0.38m | 4:15AM0.31m | 4:10PM0.46m | ||||||||||||||
 | |  | |  | | | |  | | | |  | | |  | | | |
 | — | — | — | 6:09 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 6:32 | — | — | — | — | — | — | — | 6:31 | — | — |
mm | 8 | 1 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 28 | 27 | 27 | 27 | 28 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 28 |
Feels °C | 30 | 30 | 29 | 30 | 30 | 31 | 32 | 33 | 31 | 32 | 32 | 32 | 32 | 32 | 31 | 32 | 32 | 32 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 8 | W 8 | W 7 | W 7 | WSW 7 | WNW 9 | WNW 10 | WNW 9 | W 9 | WNW 9 | W 9 | W 9 | WNW 9 | WNW 9 | W 9 | W 10 | W 9 |
| kJ | 117 | 138 | 114 | 107 | 88 | 55 | 121 | 166 | 153 | 230 | 169 | 219 | 257 | 211 | 211 | 327 | 398 | 425 |
Swell 2 Height (m) Direction Period (s) | ENE 11 | ENE 10 | WNW 9 | WNW 9 | WNW 8 | WNW 9 | WSW 7 | WSW 8 | WSW 7 | ENE 11 | SW 6 | NE 11 | NE 11 | SW 6 | SW 6 | NE 10 | NE 10 | NE 10 |
| kJ | 44 | 42 | 46 | 30 | 40 | 70 | 40 | 39 | 35 | 44 | 33 | 56 | 57 | 28 | 27 | 48 | 48 | 48 |
Swell 3 Height (m) Direction Period (s) | NW 10 | NW 10 | ENE 10 | NE 10 | NE 10 | NE 10 | NE 10 | ENE 10 | ENE 11 | SE 9 | ENE 10 | SE 9 | SE 9 | NE 11 | NE 10 | SE 9 | E 11 | E 11 |
| kJ | 25 | 25 | 40 | 25 | 25 | 27 | 28 | 43 | 44 | 22 | 42 | 14 | 13 | 56 | 49 | 13 | 9 | 9 |
Wind waves Height (m) Direction Period (s) | NW 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 1858 | 1858 | 11 | 11 | 1836 | 11 | 11 | 7 | 11 | 0 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 0 |
Best forecast wave conditions in Guam | ||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||
Header Global | ||||||||||||||||||
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