Surf Forecasts:
How big are the waves at Boat Basin Lefts today (23 Sep):
- Afternoon surf: Afternoon surf (23 Sep, local time) - 3.5ft (1.0m), 12s period with NNW swell.
- Evening surf: Evening surf (23 Sep, local time) - 3ft (0.9m), 11s period with NNW swell.
The current surf forecast for Boat Basin Lefts at 11PM is: 0.9m 11s primary swell from a North-northwest direction (forecast issued at 03:00pm September 23). An open ocean swell of 0.7m 6s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 Sep) | - | - |
| Afternoon (23 Sep) | 3.5ft (1.0m) | 12s |
| Evening (23 Sep) | 3ft (0.9m) | 11s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 28mm), heaviest during Wed night. Warm (max 29°C on Wed afternoon, min 28°C on Wed afternoon). Wind will be generally light. | ||||||||||||||||||||
Wed 23 | Thursday 24 | Friday 25 | ||||||||||||||||||
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) | NNW 12 | NNW 12 | NNW 11 | NNW 11 | NNW 11 | NNW 11 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 9 | NNW 9 | NNW 9 | NNW 9 | ENE 8 | ENE 8 | ENE 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 269 | 260 | 204 | 193 | 170 | 133 | 128 | 88 | 86 | 55 | 54 | 50 | 48 | 47 | 32 | 31 | 30 | 27 | 27 | 47 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 6:34PM0.82m | 5:02AM0.78m | 6:54PM0.84m | 6:02AM0.81m | 7:13PM0.86m | |||||||||||||||
Low Tide | 11:14AM0.25m | 00:01AM0.59m | 11:57AM0.26m | 00:36AM0.52m | 12:37PM0.29m | |||||||||||||||
 | |  | |  | | | |  | |  | | | | | | | | | | |
 | — | — | — | — | — | 6:09 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — |
 | — | 6:16 | — | — | — | — | — | — | — | 6:15 | — | — | — | — | — | — | — | 6:15 | — | — |
mm | 1 | 2 | 1 | 4 | — | 1 | 1 | 2 | — | 1 | — | 3 | 1 | 1 | 2 | 1 | 1 | 1 | 2 | 1 |
Temp °C | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 28 | 28 |
Feels °C | 31 | 32 | 32 | 33 | 33 | 33 | 33 | 32 | 32 | 31 | 31 | 31 | 31 | 31 | 32 | 31 | 32 | 32 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | NNW 12 | NNW 12 | SSW 6 | NNW 11 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 |
| kJ | 269 | 260 | 69 | 193 | 58 | 58 | 58 | 47 | 47 | 49 | 49 | 49 | 46 | 46 | 46 | 38 | 39 | 41 | 49 | 49 |
Swell 2 Height (m) Direction Period (s) | SSW 7 | SW 6 | NNW 11 | SSW 6 | NNW 11 | NNW 11 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 76 | 58 | 204 | 39 | 170 | 133 | 128 | 88 | 86 | 55 | 54 | 50 | 48 | 47 | 28 | 27 | 27 | 27 | 27 | 47 |
Swell 3 Height (m) Direction Period (s) | NE 9 | SSE 8 | NE 9 | WSW 7 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | ENE 8 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NW 8 | NNW 8 |
| kJ | 41 | 41 | 41 | 25 | 42 | 42 | 41 | 41 | 40 | 40 | 39 | 39 | 37 | 28 | 32 | 31 | 30 | 27 | 17 | 13 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 229 | 229 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 16 | 16 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
Best forecast wave conditions in Guam | ||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||
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