Surf Forecasts:
How big are the waves at Boat Basin Lefts today (30 Sep):
- Afternoon surf: Afternoon surf (30 Sep, local time) - 1.5ft (0.5m), 12s period with NW swell.
- Evening surf: Evening surf (30 Sep, local time) - 2ft (0.6m), 11s period with NW swell.
The current surf forecast for Boat Basin Lefts at 9PM is: 0.6m 11s primary swell from a Northwest direction (forecast issued at 03:00pm September 30). An open ocean swell of 0.6m 6s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 Sep) | - | - |
| Afternoon (30 Sep) | 1.5ft (0.5m) | 12s |
| Evening (30 Sep) | 2ft (0.6m) | 11s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 40mm), heaviest during Fri night. Warm (max 29°C on Wed afternoon, min 28°C on Wed night). Winds increasing (light winds from the WNW on Wed afternoon, near gales from the WSW by Fri night). | ||||||||||||||||||||
Wed 30 | Thursday 1 | Friday 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) | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NNE 13 | NW 10 | NNE 13 | NW 10 | NW 10 | NNE 12 | NE 8 | NNE 12 | NE 8 | NE 8 | NNE 9 | NE 9 | NE 9 | NE 10 | NNW 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 53 | 116 | 103 | 96 | 92 | 59 | 64 | 56 | 69 | 52 | 51 | 41 | 49 | 41 | 32 | 52 | 29 | 29 | 51 | 78 |
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 | cross | cross | cross | cross | cross | cross | cross |
High Tide | 10:40AM0.87m | 9:15PM0.89m | 11:45AM0.84m | 9:50PM0.88m | 1:00PM0.82m | |||||||||||||||
Low Tide | 3:57PM0.58m | 4:32AM0.11m | 4:43PM0.64m | 5:25AM0.10m | 5:38PM0.69m | |||||||||||||||
 |  |  |  |  | |  | | | | | | | | | | | | | | |
 | — | — | — | — | — | 6:09 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — |
 | — | 6:12 | — | — | — | — | — | — | — | 6:10 | — | — | — | — | — | — | — | 6:09 | — | — |
mm | — | — | — | 1 | — | — | 1 | 1 | — | 1 | 2 | 2 | 2 | 1 | 2 | 2 | 3 | 2 | 1 | 3 |
Temp °C | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
Feels °C | 31 | 31 | 32 | 31 | 30 | 30 | 30 | 30 | 29 | 29 | 27 | 27 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | SSW 6 | SW 6 | NNE 7 | NW 10 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NNE 9 | NE 9 | NNW 7 | NNW 8 | NNW 8 |
| kJ | 53 | 116 | 103 | 96 | 92 | 24 | 30 | 21 | 69 | 40 | 50 | 41 | 41 | 41 | 32 | 52 | 29 | 17 | 51 | 78 |
Swell 2 Height (m) Direction Period (s) | SSE 6 | SSE 6 | SW 5 | SW 6 | SSW 6 | NW 10 | NW 10 | NW 10 | NE 7 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NNE 12 | NNE 12 | N 7 | NE 9 | NE 10 | NE 11 |
| kJ | 14 | 13 | 10 | 21 | 23 | 47 | 64 | 34 | 27 | 50 | 34 | 33 | 29 | 29 | 28 | 27 | 14 | 29 | 50 | 30 |
Swell 3 Height (m) Direction Period (s) | ENE 9 | NE 8 | SSE 6 | NNE 13 | NNE 13 | NNE 13 | NNE 13 | NNE 13 | NNE 13 | NNE 12 | NNE 12 | NNE 12 | NNE 12 | NNE 12 | NW 9 | NW 8 | NNE 12 | NNE 11 | SE 9 | NE 9 |
| kJ | 27 | 15 | 13 | 35 | 59 | 59 | 58 | 56 | 53 | 52 | 51 | 29 | 49 | 28 | 20 | 10 | 26 | 25 | 3 | 12 |
Wind waves Height (m) Direction Period (s) | — | WSW 5 | — | — | NW 3 | NNW 7 | NW 3 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 6 | SW 7 | SW 7 | SW 8 | SW 8 | SW 8 | SW 8 | SW 9 |
| kJ | — | 11 | — | — | 1 | 16 | 3 | 52 | 88 | 124 | 176 | 208 | 256 | 398 | 543 | 756 | 979 | 1303 | 1534 | 1509 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 11 | 2069 | 11 | 16 | 11 | 11 | 16 | 16 | 2075 | 2064 | 2064 | 2064 | 1908 | 1996 | 1858 | 2064 | 2069 | 2083 | 2234 | 2280 |
Best forecast wave conditions in Guam | ||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||
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