Surf Forecasts:
How big are the waves at Boat Basin Lefts today (18 Oct):
- Morning surf: Morning surf (18 Oct, local time) - 6ft (1.8m), 9s period with N swell.
- Afternoon surf: Afternoon surf (18 Oct, local time) - 0.5ft (0.2m), 11s period with NNE swell.
- Evening surf: Evening surf (18 Oct, local time) - 2.5ft (0.8m), 9s period with ENE swell.
The current surf forecast for Boat Basin Lefts at 4AM is: 9.5m 14s primary swell from a East-northeast direction (forecast issued at 09:00pm October 17). The wind direction is predicted to be cross-onshore and the swell rating is 11.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Oct) | 6ft (1.8m) | 9s |
| Afternoon (18 Oct) | 0.5ft (0.2m) | 11s |
| Evening (18 Oct) | 2.5ft (0.8m) | 9s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 139mm), heaviest during Sun morning. Warm (max 28°C on Tue morning, min 25°C on Sun night). Winds decreasing (extremely windy from the ESE on Sat night, light winds from the SE by Tue afternoon). | ||||||||||||||||||
Sat 17 | Sunday 18 | Monday 19 | ||||||||||||||||
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) | E 12 | E 13 | ENE 14 | ENE 14 | NE 9 | ENE 9 | ENE 8 | NNE 11 | NE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | NE 9 | NE 9 | W 11 |
Wave Graph  | ||||||||||||||||||
 kJ | 2386 | 5012 | 17780 | 34642 | 586 | 460 | 286 | 13 | 125 | 108 | 108 | 96 | 73 | 73 | 71 | 81 | 81 | 118 |
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-off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 10:16PM0.76m | 2:49PM0.77m | 11:01PM0.73m | 3:46PM0.78m | ||||||||||||||
Low Tide | 6:07PM0.69m | 6:27AM0.24m | 7:30PM0.69m | 7:25AM0.27m | 9:06PM0.67m | |||||||||||||
 | | | |  | | | | |  |  |  |  | | | | | | |
 | — | — | — | 6:11 | — | — | — | — | — | — | — | 6:11 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 6:00 | — | — | — | — | — | — | — | 6:00 | — | — |
mm | 2 | 2 | 2 | 24 | 20 | 48 | 5 | 2 | 3 | 7 | 4 | — | 1 | 3 | 1 | 3 | 2 | 2 |
Temp °C | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 25 | 27 | 27 | 27 | 27 | 27 | 27 |
Feels °C | 25 | 23 | 20 | 11 | 6 | 14 | 18 | 19 | 21 | 20 | 21 | 20 | 24 | 24 | 25 | 25 | 25 | 27 |
Swell 1 Height (m) Direction Period (s) | E 12 | E 13 | ENE 14 | — | NE 9 | ENE 9 | ENE 8 | NNE 11 | NE 9 | ENE 9 | SW 11 | ENE 9 | SW 10 | SW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 |
| kJ | 2386 | 5012 | 15284 | — | 586 | 460 | 286 | 13 | 125 | 108 | 1110 | 96 | 1047 | 913 | 820 | 712 | 537 | 471 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | N 9 | — | N 8 | NE 11 | — | N 11 | ENE 9 | NNE 11 | ENE 9 | ENE 9 | ENE 9 | NE 9 | NE 9 | NE 9 |
| kJ | — | — | — | — | 476 | — | 12 | 5 | — | 9 | 108 | 22 | 73 | 73 | 71 | 81 | 81 | 77 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | N 11 | NNE 11 | NNE 11 | NNE 10 | NNE 10 | W 11 | W 11 | W 11 |
| kJ | — | — | — | — | — | — | — | — | — | — | 9 | 11 | 22 | 21 | 20 | 38 | 60 | 118 |
Wind waves Height (m) Direction Period (s) | NNE 7 | NNE 8 | ENE 14 | ENE 14 | ESE 13 | SSE 11 | SSE 11 | S 11 | S 10 | S 10 | S 9 | S 10 | SSE 8 | SSE 8 | S 8 | S 9 | S 8 | S 8 |
| kJ | 461 | 922 | 17780 | 34642 | 32815 | 11406 | 10774 | 7572 | 5419 | 4198 | 2289 | 2730 | 941 | 887 | 899 | 848 | 716 | 597 |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1905 | 1290 | 1290 | 1836 | 1836 | 1836 | 1836 | 2064 | 2069 | 2064 | 1866 |
Best forecast wave conditions in Guam | ||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||
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