Surf Forecasts:
How big are the waves at Boat Basin Lefts today (20 Aug):
- Morning surf: Morning surf (20 Aug, local time) - 2.5ft (0.8m), 9s period with WNW swell.
- Afternoon surf: Afternoon surf (20 Aug, local time) - 2.5ft (0.7m), 6s period with NE swell.
- Evening surf: Evening surf (20 Aug, local time) - 2.5ft (0.7m), 6s period with NE swell.
The current surf forecast for Boat Basin Lefts at 4AM is: 0.7m 8s primary swell from a West-northwest direction and 0.6m 6s secondary swell from a Northeast direction, 0.5m 5s secondary swell from a North direction (forecast issued at 09:00pm August 19). The wind direction is predicted to be cross-shore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Aug) | 2.5ft (0.8m) | 9s |
| Afternoon (20 Aug) | 2.5ft (0.7m) | 6s |
| Evening (20 Aug) | 2.5ft (0.7m) | 6s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 7mm), mostly falling on Wed night. Warm (max 29°C on Thu morning, min 27°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Wed 19 | Thursday 20 | Friday 21 | ||||||||||||||||
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 8 | W 8 | W 9 | WNW 8 | WNW 9 | WNW 9 | WNW 8 | NE 6 | NE 6 | NE 6 | NE 7 | NE 7 | NE 6 | NE 6 | NE 6 | E 15 | E 12 | E 12 |
Wave Graph  | ||||||||||||||||||
 kJ | 116 | 113 | 96 | 73 | 82 | 103 | 55 | 42 | 42 | 51 | 35 | 35 | 34 | 34 | 34 | 282 | 333 | 544 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-off | cross | cross | cross-off | cross-off | cross-off | glassy | glassy | glassy | glassy | cross | glassy | glassy |
High Tide | 11:43PM0.84m | 2:50PM0.69m | 00:13AM0.82m | 4:40PM0.70m | ||||||||||||||
Low Tide | 5:46PM0.59m | 7:21AM0.28m | 6:24PM0.65m | 8:19AM0.26m | 7:23PM0.69m | |||||||||||||
 |  | | |  | |  | | | |  | | | | |  | | | |
 | — | — | — | 6:07 | — | — | — | — | — | — | — | 6:07 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 6:39 | — | — | — | — | — | — | — | 6:38 | — | — |
mm | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | — |
Temp °C | 28 | 28 | 28 | 27 | 27 | 29 | 29 | 29 | 28 | 28 | 27 | 27 | 27 | 29 | 29 | 29 | 29 | 28 |
Feels °C | 31 | 32 | 33 | 31 | 31 | 33 | 32 | 32 | 31 | 32 | 32 | 32 | 32 | 35 | 34 | 33 | 35 | 33 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 8 | W 9 | WNW 8 | WNW 9 | WNW 9 | WSW 9 | WSW 9 | NE 6 | NE 6 | NE 7 | NE 7 | ESE 13 | ESE 12 | ESE 11 | E 15 | E 12 | E 12 |
| kJ | 116 | 113 | 96 | 73 | 82 | 103 | 82 | 80 | 42 | 51 | 35 | 35 | 222 | 220 | 153 | 282 | 333 | 544 |
Swell 2 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | NE 6 | NNE 6 | NE 6 | NE 6 | NE 6 | WSW 9 | WSW 9 | WSW 8 | ESE 14 | NE 6 | NE 6 | NE 6 | E 10 | E 16 | SSE 10 |
| kJ | 43 | 42 | 41 | 30 | 44 | 39 | 40 | 42 | 77 | 77 | 57 | 149 | 34 | 34 | 34 | 122 | 239 | 61 |
Swell 3 Height (m) Direction Period (s) | NE 8 | NE 8 | WSW 8 | WSW 9 | WSW 8 | WSW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | W 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | NNE 6 | NNE 6 | NNE 6 |
| kJ | 18 | 18 | 24 | 47 | 38 | 39 | 55 | 40 | 40 | 39 | 34 | 53 | 53 | 39 | 37 | 26 | 26 | 25 |
Wind waves Height (m) Direction Period (s) | N 5 | N 5 | N 5 | N 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 31 | 23 | 24 | 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 1290 | 2077 | 20 | 20 | 20 | 0 | 20 | 20 | 0 | 0 | 0 | 15 | 11 | 11 | 11 | 11 | 0 | 0 |
Best forecast wave conditions in Guam | ||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||
Header Global | ||||||||||||||||||
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