Surf Forecasts:
How big are the waves at Boat Basin Lefts today (17 Sep):
- Morning surf: Morning surf (17 Sep, local time) - 3.5ft (1.1m), 8s period with NE swell.
- Afternoon surf: Afternoon surf (17 Sep, local time) - 3ft (0.9m), 8s period with NNE swell.
- Evening surf: Evening surf (17 Sep, local time) - 3ft (0.9m), 8s period with NNE swell.
The current surf forecast for Boat Basin Lefts at 6AM is: 1.1m 8s primary swell from a Northeast direction (forecast issued at 03:00am September 17). An open ocean swell of 0.9m 7s is not directed at the surf break, a second open ocean swell of 1.1m 8s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Sep) | 3.5ft (1.1m) | 8s |
| Afternoon (17 Sep) | 3ft (0.9m) | 8s |
| Evening (17 Sep) | 3ft (0.9m) | 8s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 13mm), heaviest on Thu night. Warm (max 29°C on Thu morning, min 28°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||||||||||
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 | 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 9 | NE 8 | NE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 9 | NNE 8 | NNE 8 | N 8 | N 8 | N 8 | N 8 | N 8 | N 9 | N 9 | N 9 | N 9 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 152 | 162 | 158 | 143 | 140 | 103 | 103 | 105 | 103 | 80 | 78 | 58 | 90 | 75 | 68 | 60 | 66 | 68 | 47 | 66 | 102 | 99 | 99 | 95 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | 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 | cross | cross | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross | cross |
High Tide | 10:11PM0.83m | 12:54PM0.75m | 10:37PM0.81m | 2:16PM0.73m | 11:08PM0.78m | 3:51PM0.73m | ||||||||||||||||||
Low Tide | 5:34AM0.23m | 5:21PM0.64m | 6:23AM0.24m | 6:07PM0.67m | 7:21AM0.25m | 7:20PM0.70m | ||||||||||||||||||
 | |  |  |  | |  | | | | | | | | |  | | | | | | | | | |
 | — | 6:09 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:21 | — | — | — | — | — | — | — | 6:20 | — | — | — | — | — | — | — | 6:19 | — | — |
mm | 5 | 1 | — | 1 | — | — | — | — | — | 2 | — | 1 | 2 | 1 | 2 | — | — | — | — | 1 | 1 | 1 | 1 | — |
Temp °C | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 |
Feels °C | 31 | 31 | 30 | 30 | 29 | 30 | 31 | 31 | 30 | 30 | 30 | 31 | 31 | 31 | 30 | 29 | 28 | 29 | 32 | 32 | 31 | 32 | 32 | 33 |
Swell 1 Height (m) Direction Period (s) | NE 9 | NE 8 | NE 8 | NNE 8 | NNE 8 | SSW 8 | SSW 8 | SSW 8 | SW 8 | SW 9 | SW 9 | SW 8 | SW 8 | WSW 8 | WSW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | WSW 8 | SW 8 | WSW 8 |
| kJ | 152 | 162 | 158 | 143 | 140 | 173 | 224 | 208 | 253 | 304 | 293 | 262 | 256 | 235 | 230 | 270 | 244 | 244 | 244 | 244 | 216 | 165 | 187 | 175 |
Swell 2 Height (m) Direction Period (s) | SW 8 | SW 8 | SSW 7 | SSW 7 | S 7 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 9 | NNE 8 | NNE 8 | N 8 | N 8 | N 8 | N 8 | N 8 | N 9 | N 9 | N 9 | N 9 |
| kJ | 80 | 80 | 77 | 62 | 61 | 103 | 103 | 105 | 103 | 80 | 78 | 58 | 90 | 75 | 68 | 60 | 66 | 68 | 47 | 66 | 102 | 99 | 99 | 95 |
Swell 3 Height (m) Direction Period (s) | N 7 | S 7 | SW 8 | SW 8 | SW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 9 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | S 7 | S 7 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SSE 8 | S 7 | SE 8 | SE 8 |
| kJ | 42 | 44 | 69 | 69 | 54 | 44 | 27 | 26 | 33 | 17 | 18 | 16 | 15 | 22 | 22 | 19 | 35 | 35 | 34 | 33 | 45 | 33 | 33 | 32 |
Wind waves Height (m) Direction Period (s) | — | — | SW 8 | WSW 8 | W 3 | SSW 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 154 | 136 | 5 | 257 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 11 | 16 | 16 | 1836 | 2064 | 11 | 16 | 16 | 16 | 16 | 16 | 229 | 229 | 229 | 229 | 229 | 1290 | 16 | 16 | 229 | 229 | 229 | 11 | 11 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
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