Surf Forecasts:
How big are the waves at Boat Basin Lefts today (11 Aug):
- Afternoon surf: Afternoon surf (11 Aug, local time) - 6.5ft (2.0m), 11s period with W swell.
- Evening surf: Evening surf (11 Aug, local time) - 6ft (1.8m), 9s period with W swell.
The current surf forecast for Boat Basin Lefts at 10PM is: 1.8m 9s primary swell from a West direction and 0.8m 12s secondary swell from a West-northwest direction (forecast issued at 03:00pm August 11). An open ocean swell of 0.4m 11s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 Aug) | - | - |
| Afternoon (11 Aug) | 6.5ft (2.0m) | 11s |
| Evening (11 Aug) | 6ft (1.8m) | 9s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 9mm), mostly falling on Tue afternoon. Warm (max 29°C on Wed morning, min 28°C on Tue afternoon). Wind will be generally light. | ||||||||||||||||||||
Tue 11 | Wednesday 12 | Thursday 13 | ||||||||||||||||||
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) | W 11 | W 11 | W 9 | W 9 | W 9 | W 11 | WNW 11 | W 8 | W 8 | W 10 | W 10 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 10 | WNW 10 | WNW 11 | WNW 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 843 | 949 | 528 | 521 | 517 | 900 | 218 | 407 | 418 | 723 | 745 | 1121 | 1242 | 1219 | 1219 | 1051 | 907 | 925 | 920 | 858 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 8:03PM0.90m | 5:47AM0.92m | 8:36PM0.91m | 6:51AM0.92m | 9:07PM0.92m | |||||||||||||||
Low Tide | 12:29PM0.00m | 00:55AM0.68m | 1:19PM0.01m | 1:47AM0.62m | 2:05PM0.06m | |||||||||||||||
 | |  | | |  | | |  | |  | | | | | | |  | | | |
 | — | — | — | — | — | 6:07 | — | — | — | — | — | — | — | 6:07 | — | — | — | — | — | — |
 | — | 6:45 | — | — | — | — | — | — | — | 6:44 | — | — | — | — | — | — | — | 6:44 | — | — |
mm | 2 | 3 | 2 | 1 | 1 | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 28 |
Feels °C | 28 | 28 | 29 | 30 | 30 | 29 | 29 | 30 | 30 | 30 | 30 | 31 | 30 | 30 | 30 | 31 | 30 | 31 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | NNW 7 | SE 11 | NW 12 | WNW 12 | NW 12 | SE 10 | WNW 11 | WNW 10 | WNW 10 | SE 10 | SE 10 | SE 10 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 10 | WNW 10 | WNW 11 | WNW 10 |
| kJ | 15 | 30 | 202 | 174 | 140 | 37 | 218 | 158 | 155 | 35 | 35 | 35 | 1242 | 1219 | 1219 | 1051 | 907 | 925 | 920 | 858 |
Swell 2 Height (m) Direction Period (s) | SE 11 | NNW 7 | SE 11 | SE 11 | SE 10 | NNE 11 | SE 10 | SE 10 | SE 10 | NNE 10 | NNE 9 | NNE 9 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 11 |
| kJ | 30 | 9 | 41 | 40 | 38 | 22 | 36 | 36 | 35 | 18 | 17 | 16 | 37 | 37 | 52 | 51 | 51 | 52 | 54 | 55 |
Swell 3 Height (m) Direction Period (s) | NE 10 | NNE 10 | ENE 10 | NNE 10 | NNE 10 | E 10 | NNE 10 | NNE 10 | NNE 10 | E 10 | E 9 | ENE 9 | NNE 9 | ENE 9 | ENE 11 | ENE 11 | ENE 11 | ENE 11 | ENE 11 | E 11 |
| kJ | 15 | 10 | 10 | 9 | 19 | 7 | 21 | 20 | 19 | 7 | 7 | 8 | 8 | 8 | 11 | 11 | 11 | 11 | 11 | 9 |
Wind waves Height (m) Direction Period (s) | W 11 | W 11 | W 9 | W 9 | W 9 | W 11 | WSW 8 | W 8 | W 8 | W 10 | W 10 | WNW 11 | — | — | — | — | — | — | — | — |
| kJ | 843 | 949 | 528 | 521 | 517 | 900 | 364 | 407 | 418 | 723 | 745 | 1121 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1905 | 1905 | 16 | 1836 | 1836 | 1836 | 1836 | 1836 | 1905 | 1905 | 1290 | 1836 | 1836 | 1290 | 1836 | 1836 | 2055 | 229 | 16 | 229 |
Best forecast wave conditions in Guam | ||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||
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