Surf Forecasts:
How big are the waves at Boat Basin Lefts today (31 Jul):
- Afternoon surf: Afternoon surf (31 Jul, local time) - 1.5ft (0.4m), 18s period with ENE swell.
- Evening surf: Evening surf (31 Jul, local time) - 3ft (0.9m), 16s period with ENE swell.
The current surf forecast for Boat Basin Lefts at 8PM is: 0.5m 17s primary swell from a East direction (forecast issued at 03:00pm July 31). An open ocean swell of 0.9m 7s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 Jul) | - | - |
| Afternoon (31 Jul) | 1.5ft (0.4m) | 18s |
| Evening (31 Jul) | 3ft (0.9m) | 16s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 39mm), heaviest during Sat morning. Warm (max 29°C on Fri afternoon, min 28°C on Fri afternoon). Winds increasing (light winds from the WNW on Fri night, fresh winds from the W by Mon morning). | ||||||||||||||||||||
Fri 31 | Saturday 1 | Sunday 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) | ENE 15 | ENE 18 | E 17 | ENE 16 | E 15 | E 15 | E 14 | E 14 | E 14 | ENE 14 | E 14 | ENE 15 | ENE 16 | ENE 16 | ENE 15 | ENE 14 | ENE 15 | ENE 15 | ENE 15 | ENE 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 42 | 102 | 142 | 416 | 447 | 619 | 703 | 713 | 684 | 704 | 480 | 817 | 1038 | 999 | 962 | 800 | 904 | 869 | 911 | 886 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 10:03PM0.88m | 8:26AM0.83m | 10:24PM0.89m | 9:17AM0.81m | ||||||||||||||||
Low Tide | 2:52PM0.14m | 3:26AM0.59m | 3:25PM0.19m | 4:08AM0.54m | 3:58PM0.26m | |||||||||||||||
 | |  | | |  |  | | | | | | | | | | | | | | |
 | — | — | — | — | — | 6:05 | — | — | — | — | — | — | — | 6:05 | — | — | — | — | — | — |
 | — | 6:49 | — | — | — | — | — | — | — | 6:49 | — | — | — | — | — | — | — | 6:47 | — | — |
mm | 1 | 1 | 1 | 1 | 2 | — | — | 1 | 3 | 2 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 2 |
Temp °C | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
Feels °C | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 28 | 28 | 27 | 27 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 7 | SW 7 | SW 7 | ENE 16 | E 15 | E 15 | E 14 | E 14 | E 14 | ENE 14 | E 14 | ENE 15 | ENE 16 | ENE 16 | ENE 15 | ENE 14 | ENE 15 | ENE 15 | ENE 15 | ENE 14 |
| kJ | 63 | 77 | 77 | 416 | 447 | 619 | 703 | 713 | 684 | 704 | 480 | 817 | 1038 | 999 | 962 | 800 | 904 | 869 | 911 | 886 |
Swell 2 Height (m) Direction Period (s) | ENE 8 | ENE 8 | E 17 | SW 7 | SW 7 | SW 7 | SW 7 | NNE 9 | NNE 9 | NNE 9 | ENE 17 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SSE 10 | SSE 10 | SSE 10 |
| kJ | 22 | 22 | 142 | 79 | 79 | 93 | 112 | 17 | 17 | 17 | 237 | 12 | 12 | 12 | 12 | 12 | 12 | 9 | 9 | 9 |
Swell 3 Height (m) Direction Period (s) | ENE 15 | ENE 18 | ENE 8 | NNE 9 | ENE 19 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | N 9 | NNE 9 | NNE 9 | N 8 | N 8 |
| kJ | 42 | 102 | 22 | 16 | 119 | 13 | 13 | 13 | 12 | 12 | 16 | 16 | 16 | 16 | 8 | 6 | 8 | 7 | 6 | 5 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | W 7 | WSW 7 | WSW 8 | WSW 8 | WSW 8 | WSW 8 |
| kJ | — | — | — | — | — | — | 163 | 134 | 185 | 197 | 192 | 192 | 172 | 193 | 245 | 302 | 346 | 438 | 554 | 672 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 16 | 11 | 11 | 11 | 11 | 11 | 11 | 16 | 11 | 11 | 11 | 11 | 11 | 1836 | 1836 | 1836 | 1908 | 1908 | 1290 | 1905 |
Best forecast wave conditions in Guam | ||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||
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