Surf Forecasts:
How big are the waves at Boat Basin Lefts today (31 Aug):
- Afternoon surf: Afternoon surf (31 Aug, local time) - 3ft (0.9m), 10s period with WNW swell.
- Evening surf: Evening surf (31 Aug, local time) - 3.5ft (1.1m), 9s period with W swell.
The current surf forecast for Boat Basin Lefts at 7PM is: 0.9m 9s primary swell from a West-northwest direction (forecast issued at 03:00pm August 31). An open ocean swell of 0.6m 7s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 Aug) | - | - |
| Afternoon (31 Aug) | 3ft (0.9m) | 10s |
| Evening (31 Aug) | 3.5ft (1.1m) | 9s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 17mm), heaviest on Thu morning. Warm (max 29°C on Mon afternoon, min 26°C on Thu morning). Winds increasing (calm on Wed morning, strong winds from the SW by Thu morning). | ||||||||||||||||||||
Mon 31 | Tuesday 1 | Wednesday 2 | ||||||||||||||||||
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) | WNW 10 | WNW 10 | WNW 9 | W 9 | W 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 137 | 166 | 156 | 198 | 225 | 169 | 249 | 243 | 248 | 259 | 373 | 357 | 349 | 342 | 342 | 342 | 342 | 349 | 306 | 349 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross | glassy | cross-on | cross | cross-off | cross-off |
High Tide | 9:42PM0.89m | 10:27AM0.81m | 10:06PM0.89m | 11:32AM0.79m | ||||||||||||||||
Low Tide | 3:33PM0.38m | 4:15AM0.31m | 4:10PM0.46m | 5:00AM0.25m | 4:48PM0.54m | |||||||||||||||
 | |  |  |  | | |  | |  | | | | | | | | | | | |
 | — | — | — | — | — | 6:09 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — |
 | — | 6:32 | — | — | — | — | — | — | — | 6:31 | — | — | — | — | — | — | — | 6:31 | — | — |
mm | — | — | 1 | — | — | — | — | 2 | 1 | — | 1 | — | — | — | — | — | — | 1 | — | 1 |
Temp °C | 29 | 29 | 28 | 28 | 28 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 28 | 28 | 28 | 28 | 27 |
Feels °C | 33 | 32 | 31 | 31 | 30 | 29 | 29 | 30 | 30 | 31 | 31 | 32 | 32 | 31 | 31 | 33 | 32 | 31 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 10 | WNW 9 | W 9 | W 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 |
| kJ | 137 | 166 | 156 | 198 | 225 | 169 | 166 | 243 | 248 | 259 | 373 | 357 | 349 | 342 | 342 | 342 | 342 | 349 | 306 | 349 |
Swell 2 Height (m) Direction Period (s) | WSW 7 | WSW 8 | WSW 7 | ENE 11 | ENE 10 | SW 7 | WSW 7 | SW 7 | SW 7 | SW 6 | NE 10 | NE 10 | NE 10 | NE 10 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 10 |
| kJ | 41 | 39 | 36 | 44 | 42 | 52 | 90 | 54 | 52 | 38 | 48 | 48 | 47 | 46 | 43 | 42 | 41 | 30 | 42 | 44 |
Swell 3 Height (m) Direction Period (s) | NE 10 | NE 10 | ENE 11 | SE 9 | SE 9 | ENE 11 | NE 11 | NE 11 | NE 10 | NE 10 | E 11 | E 11 | E 10 | E 10 | E 10 | E 10 | E 10 | ENE 6 | S 5 | SSE 6 |
| kJ | 28 | 28 | 44 | 22 | 14 | 45 | 57 | 56 | 49 | 48 | 9 | 20 | 8 | 8 | 8 | 18 | 8 | 3 | 5 | 7 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | WNW 9 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 249 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 1 | 11 | 11 | 0 | 11 | 11 | 11 | 11 | 11 | 11 | 2 | 0 | 11 | 11 | 11 | 229 | 0 | 11 |
Best forecast wave conditions in Guam | ||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||
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