Surf Forecasts:
How big are the waves at Boat Basin Lefts today (23 Aug):
- Morning surf: Morning surf (23 Aug, local time) - 4ft (1.2m), 10s period with N swell.
- Afternoon surf: Afternoon surf (23 Aug, local time) - 4ft (1.2m), 11s period with N swell.
- Evening surf: Evening surf (23 Aug, local time) - 3.5ft (1.1m), 10s period with N swell.
The current surf forecast for Boat Basin Lefts at 4AM is: 1.1m 10s primary swell from a North-northeast direction and 0.3m 8s secondary swell from a West-northwest direction (forecast issued at 09:00pm August 22). An open ocean swell of 2.0m 8s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 Aug) | 4ft (1.2m) | 10s |
| Afternoon (23 Aug) | 4ft (1.2m) | 11s |
| Evening (23 Aug) | 3.5ft (1.1m) | 10s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 66mm), heaviest during Sat night. Warm (max 29°C on Sun afternoon, min 26°C on Mon morning). Winds decreasing (fresh winds from the SSW on Mon morning, light winds from the W by Tue afternoon). | ||||||||||||||||||
Sat 22 | Sunday 23 | Monday 24 | ||||||||||||||||
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) | NNE 9 | NNE 9 | NNE 10 | NNE 10 | NNE 10 | N 10 | N 11 | N 11 | N 10 | N 10 | N 10 | N 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 11 | NNW 11 |
Wave Graph  | ||||||||||||||||||
 kJ | 148 | 161 | 218 | 260 | 300 | 240 | 319 | 329 | 262 | 206 | 206 | 167 | 177 | 139 | 141 | 158 | 170 | 170 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 5:59PM0.73m | 1:47AM0.78m | 6:41PM0.76m | 2:57AM0.78m | 7:12PM0.79m | |||||||||||||
Low Tide | 9:03PM0.71m | 10:19AM0.22m | 10:36PM0.71m | 11:11AM0.20m | ||||||||||||||
 | |  | |  |  | | | | |  | | |  | | |  | | |
 | — | — | — | 6:07 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 6:37 | — | — | — | — | — | — | — | 6:37 | — | — |
mm | 1 | 2 | 9 | 9 | 3 | — | — | — | 1 | 1 | — | 1 | 4 | 8 | 1 | — | — | — |
Temp °C | 29 | 28 | 28 | 27 | 27 | 27 | 28 | 29 | 29 | 28 | 28 | 28 | 28 | 27 | 26 | 27 | 28 | 28 |
Feels °C | 33 | 31 | 30 | 28 | 27 | 27 | 28 | 29 | 31 | 30 | 29 | 30 | 31 | 29 | 25 | 27 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 8 | NNE 10 | NNE 10 | NNE 10 | N 10 | N 11 | N 11 | N 10 | N 10 | N 10 | N 10 | NNW 10 | NNW 10 | NNW 10 | WSW 9 | NNW 11 | NNW 11 |
| kJ | 328 | 364 | 218 | 260 | 300 | 240 | 319 | 329 | 262 | 206 | 206 | 167 | 177 | 139 | 141 | 360 | 170 | 170 |
Swell 2 Height (m) Direction Period (s) | NNE 9 | NNE 9 | WNW 8 | WNW 8 | SSE 9 | ENE 12 | ENE 12 | ENE 12 | ENE 12 | SSE 9 | SSE 9 | SE 9 | ENE 12 | SE 9 | SE 9 | NNW 10 | SE 9 | SE 9 |
| kJ | 148 | 161 | 13 | 13 | 165 | 30 | 29 | 29 | 29 | 129 | 132 | 112 | 46 | 41 | 41 | 158 | 43 | 41 |
Swell 3 Height (m) Direction Period (s) | WNW 9 | WNW 8 | E 13 | ENE 13 | WNW 8 | WNW 8 | WNW 7 | WNW 7 | NE 9 | ENE 12 | ENE 12 | ENE 12 | NNE 10 | ENE 12 | ENE 12 | SE 9 | ENE 15 | ENE 14 |
| kJ | 26 | 23 | 14 | 34 | 12 | 11 | 11 | 5 | 3 | 50 | 49 | 47 | 10 | 46 | 46 | 41 | 72 | 68 |
Wind waves Height (m) Direction Period (s) | — | SSW 8 | S 8 | S 8 | SSW 8 | SSW 8 | S 8 | SSW 8 | SSW 8 | SSW 8 | SW 8 | SW 8 | SSW 8 | SW 9 | SW 9 | SSW 8 | SW 9 | SW 9 |
| kJ | — | 280 | 559 | 576 | 323 | 509 | 617 | 629 | 646 | 458 | 456 | 498 | 601 | 580 | 645 | 353 | 835 | 747 |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 11 | 229 | 229 | 2234 | 1836 | 1836 | 1958 | 2069 | 229 | 229 | 1836 | 1858 | 1866 | 1836 | 1958 | 1905 | 1866 | 1866 |
Best forecast wave conditions in Guam | ||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||
Header Global | ||||||||||||||||||
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Surf Rating (10 Max)
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