Surf Forecasts:
How big are the waves at Boat Basin Lefts today (20 Aug):
- Afternoon surf: Afternoon surf (20 Aug, local time) - 2.5ft (0.8m), 6s period with NE swell.
- Evening surf: Evening surf (20 Aug, local time) - 2.5ft (0.8m), 6s period with NE swell.
The current surf forecast for Boat Basin Lefts at 8PM is: 0.8m 6s primary swell from a Northeast direction (forecast issued at 03:00pm August 20). An open ocean swell of 0.7m 9s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Aug) | - | - |
| Afternoon (20 Aug) | 2.5ft (0.8m) | 6s |
| Evening (20 Aug) | 2.5ft (0.8m) | 6s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 19mm), heaviest on Sun morning. Warm (max 30°C on Thu afternoon, min 27°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | ||||||||||||||||||
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) | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 7 | NE 6 | NE 6 | E 11 | NNE 6 | E 10 | E 10 | E 10 | ENE 10 | ENE 10 | ENE 11 | NE 11 | NE 11 | NE 11 | NE 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 59 | 49 | 49 | 49 | 51 | 52 | 43 | 42 | 143 | 35 | 115 | 212 | 264 | 270 | 389 | 389 | 326 | 293 | 303 | 273 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | glassy | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 2:50PM0.69m | 00:13AM0.82m | 4:40PM0.70m | 00:52AM0.79m | 5:59PM0.73m | |||||||||||||||
Low Tide | 6:24PM0.65m | 8:19AM0.26m | 7:23PM0.69m | 9:20AM0.25m | 9:03PM0.71m | |||||||||||||||
 | |  | |  | | |  |  | | | |  | | | | | | | | |
 | — | — | — | — | — | 6:07 | — | — | — | — | — | — | — | 6:07 | — | — | — | — | — | — |
 | — | 6:39 | — | — | — | — | — | — | — | 6:38 | — | — | — | — | — | — | — | 6:38 | — | — |
mm | — | — | — | — | 1 | — | — | — | 1 | 2 | — | — | — | 1 | 1 | — | 1 | 1 | 1 | 2 |
Temp °C | 30 | 30 | 28 | 28 | 28 | 27 | 27 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 28 |
Feels °C | 33 | 33 | 32 | 32 | 33 | 32 | 33 | 33 | 33 | 32 | 33 | 31 | 31 | 31 | 30 | 31 | 31 | 31 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | WSW 8 | NE 6 | NE 6 | NE 6 | NE 6 | NE 7 | NE 6 | NE 6 | E 11 | ESE 10 | E 10 | E 10 | E 10 | ENE 10 | ENE 10 | S 9 | S 9 | S 9 | S 9 | NE 11 |
| kJ | 73 | 49 | 49 | 49 | 51 | 52 | 43 | 42 | 143 | 163 | 115 | 212 | 264 | 270 | 389 | 363 | 455 | 503 | 562 | 273 |
Swell 2 Height (m) Direction Period (s) | WNW 9 | WSW 9 | WSW 9 | WSW 9 | WSW 9 | WSW 8 | WSW 8 | ESE 13 | NE 6 | NNE 6 | NNE 6 | NNE 6 | SSE 9 | SSE 8 | SSE 9 | ENE 11 | NE 11 | NE 11 | NE 11 | E 13 |
| kJ | 59 | 80 | 79 | 58 | 58 | 53 | 38 | 129 | 40 | 35 | 37 | 26 | 96 | 160 | 281 | 389 | 326 | 293 | 303 | 14 |
Swell 3 Height (m) Direction Period (s) | SSE 9 | WNW 8 | W 8 | W 8 | W 8 | ESE 13 | ESE 13 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | SSE 10 | NNE 6 | NNE 9 | WNW 8 | WNW 8 | WNW 9 | WNW 9 | WNW 9 | E 13 |
| kJ | 31 | 40 | 36 | 35 | 34 | 57 | 90 | 38 | 37 | 37 | 36 | 61 | 27 | 50 | 22 | 22 | 27 | 26 | 26 | 14 |
Wind waves Height (m) Direction Period (s) | NE 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 8 | WSW 8 | WSW 8 | WSW 7 | S 9 |
| kJ | 58 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 11 | 11 | 11 | 10 | 726 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1290 | 1290 | 0 | 0 | 0 | 0 | 0 | 16 | 11 | 11 | 11 | 2064 | 1996 | 1958 | 1996 | 1996 | 2426 | 2426 | 2386 | 2386 |
Best forecast wave conditions in Guam | ||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||
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