Surf Forecasts:
How big are the waves at Boat Basin Lefts today (22 Aug):
- Morning surf: Morning surf (22 Aug, local time) - 3.5ft (1.0m), 9s period with NE swell.
- Afternoon surf: Afternoon surf (22 Aug, local time) - 3ft (0.9m), 9s period with NE swell.
- Evening surf: Evening surf (22 Aug, local time) - 2.5ft (0.8m), 9s period with NNE swell.
The current surf forecast for Boat Basin Lefts at 3AM is: 1.3m 9s primary swell from a East-northeast direction (forecast issued at 09:00pm August 21). An open ocean swell of 0.7m 9s is not directed at the surf break, a second open ocean swell of 0.6m 8s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 Aug) | 3.5ft (1.0m) | 9s |
| Afternoon (22 Aug) | 3ft (0.9m) | 9s |
| Evening (22 Aug) | 2.5ft (0.8m) | 9s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 49mm), heaviest during Sun night. Warm (max 29°C on Fri night, min 25°C on Mon morning). Winds increasing (light winds from the WSW on Fri night, fresh winds from the SW by Sun morning). | ||||||||||||||||||
Fri 21 | Saturday 22 | Sunday 23 | ||||||||||||||||
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) | E 13 | E 10 | E 10 | ENE 9 | ENE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NNE 9 | NNE 10 | NNE 10 | NNE 10 | N 10 | N 10 | N 11 | N 11 | N 11 |
Wave Graph  | ||||||||||||||||||
 kJ | 165 | 219 | 183 | 261 | 211 | 152 | 152 | 138 | 120 | 106 | 179 | 269 | 255 | 290 | 308 | 396 | 335 | 277 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross | cross-off | cross-off | cross |
High Tide | 4:40PM0.70m | 00:52AM0.79m | 5:59PM0.73m | 1:47AM0.78m | 6:41PM0.76m | |||||||||||||
Low Tide | 7:23PM0.69m | 9:20AM0.25m | 9:03PM0.71m | 10:19AM0.22m | ||||||||||||||
 |  |  | |  |  | | | | | | | | |  | | |  | |
 | — | — | — | 6:07 | — | — | — | — | — | — | — | 6:07 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 6:38 | — | — | — | — | — | — | — | 6:37 | — | — |
mm | 1 | — | — | — | — | 1 | 1 | 2 | 1 | 1 | 4 | 5 | 2 | 3 | — | — | — | — |
Temp °C | 29 | 29 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 27 | 27 | 28 | 28 | 28 | 28 |
Feels °C | 34 | 33 | 31 | 31 | 30 | 31 | 30 | 30 | 31 | 29 | 31 | 29 | 28 | 27 | 27 | 29 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | E 10 | E 10 | E 10 | ENE 9 | ENE 9 | SSE 9 | SSE 9 | S 9 | NE 9 | NNE 9 | SSE 9 | NNE 10 | NNE 10 | N 10 | N 10 | N 11 | N 11 | N 11 |
| kJ | 148 | 219 | 183 | 261 | 211 | 238 | 264 | 286 | 120 | 106 | 199 | 269 | 255 | 290 | 308 | 396 | 335 | 277 |
Swell 2 Height (m) Direction Period (s) | E 13 | NNE 7 | SSE 9 | SE 9 | SSE 9 | NE 9 | NE 9 | NE 9 | WNW 9 | WNW 8 | NNE 10 | SSE 9 | ENE 13 | ENE 12 | ENE 12 | ENE 12 | ENE 12 | SE 9 |
| kJ | 165 | 38 | 58 | 90 | 168 | 152 | 152 | 138 | 26 | 23 | 179 | 124 | 33 | 30 | 29 | 29 | 50 | 112 |
Swell 3 Height (m) Direction Period (s) | NNE 6 | SSE 10 | NNE 6 | WNW 8 | WNW 8 | WNW 8 | WNW 9 | WNW 9 | E 13 | E 13 | WNW 8 | S 8 | WNW 8 | WNW 8 | WNW 7 | W 7 | NE 11 | ENE 12 |
| kJ | 36 | 61 | 37 | 22 | 22 | 22 | 27 | 26 | 14 | 14 | 13 | 66 | 12 | 11 | 5 | 4 | 5 | 50 |
Wind waves Height (m) Direction Period (s) | — | — | WSW 8 | SW 8 | WSW 8 | WSW 7 | SW 7 | WSW 7 | S 8 | S 8 | SSW 8 | SW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SW 8 |
| kJ | — | — | 40 | 59 | 51 | 21 | 13 | 10 | 356 | 443 | 307 | 362 | 621 | 699 | 722 | 665 | 597 | 486 |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 11 | 11 | 1996 | 16 | 1858 | 1996 | 2425 | 2425 | 2386 | 2386 | 2386 | 2234 | 1836 | 1958 | 2200 | 1958 | 229 | 229 |
Best forecast wave conditions in Guam | ||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||
Header Global | ||||||||||||||||||
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