Surf Forecasts:
How big are the waves at Boat Basin Lefts today (17 Oct):
- Morning surf: Morning surf (17 Oct, local time) - 3.5ft (1.1m), 9s period with ENE swell.
- Afternoon surf: Afternoon surf (17 Oct, local time) - 6ft (1.8m), 11s period with ENE swell.
- Evening surf: Evening surf (17 Oct, local time) - 10ft (3.0m), 12s period with E swell.
The current surf forecast for Boat Basin Lefts at 10AM is: 1.1m 9s primary swell from a East-northeast direction and 0.8m 10s secondary swell from a North direction (forecast issued at 03:00am October 17). An open ocean swell of 0.3m 9s 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 Oct) | 3.5ft (1.1m) | 9s |
| Afternoon (17 Oct) | 6ft (1.8m) | 11s |
| Evening (17 Oct) | 10ft (3.0m) | 12s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 135mm), heaviest during Sun morning. Warm (max 28°C on Sat morning, min 25°C on Sun night). Winds increasing (moderate winds from the N on Sat morning, extremely windy from the SE by Sun morning). | ||||||||||||||||||||||||
Saturday 17 | Sunday 18 | Monday 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) | ENE 10 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 11 | E 12 | E 12 | E 13 | E 13 | ENE 13 | E 13 | ENE 9 | ENE 9 | S 11 | NNE 11 | NNE 11 | ENE 10 | ENE 9 | ENE 9 | W 11 | W 11 | W 11 | W 11 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 192 | 168 | 161 | 188 | 237 | 778 | 1839 | 2924 | 4637 | 6932 | 18860 | 24341 | 362 | 304 | 0 | 11 | 12 | 60 | 75 | 56 | 114 | 119 | 189 | 244 |
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 | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 1:39PM0.77m | 10:16PM0.76m | 2:49PM0.77m | 11:01PM0.73m | 3:46PM0.78m | |||||||||||||||||||
Low Tide | 5:35AM0.20m | 6:07PM0.69m | 6:27AM0.24m | 7:30PM0.69m | 7:25AM0.27m | 9:06PM0.67m | ||||||||||||||||||
 |  |  | | |  | | | |  | | | | | | |  |  |  | | | | | | |
 | — | 6:11 | — | — | — | — | — | — | — | 6:11 | — | — | — | — | — | — | — | 6:11 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:00 | — | — | — | — | — | — | — | 6:00 | — | — | — | — | — | — | — | 6:00 | — | — |
mm | — | 3 | — | — | — | 5 | 4 | 1 | 2 | 6 | 27 | 18 | 39 | 5 | 2 | 3 | 3 | 1 | 2 | 2 | 3 | 3 | 3 | 3 |
Temp °C | 27 | 27 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 25 | 27 | 27 | 27 | 27 | 27 | 27 |
Feels °C | 29 | 29 | 28 | 29 | 27 | 25 | 25 | 25 | 23 | 19 | 21 | 12 | 16 | 18 | 19 | 21 | 21 | 19 | 23 | 25 | 25 | 25 | 25 | 26 |
Swell 1 Height (m) Direction Period (s) | ENE 10 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 11 | E 12 | E 12 | E 13 | E 13 | E 12 | NE 9 | ENE 9 | ENE 9 | — | NNE 11 | NNE 11 | ENE 10 | ENE 9 | ENE 9 | W 11 | WSW 10 | W 11 | WSW 11 |
| kJ | 192 | 168 | 161 | 188 | 237 | 778 | 1839 | 2924 | 4637 | 6932 | 7809 | 1177 | 362 | 304 | — | 11 | 12 | 60 | 75 | 56 | 114 | 445 | 189 | 265 |
Swell 2 Height (m) Direction Period (s) | N 10 | N 10 | N 10 | SE 9 | E 12 | SE 10 | — | — | — | — | — | — | — | — | — | — | — | NNE 11 | NNE 11 | W 11 | ENE 9 | W 11 | WSW 11 | W 11 |
| kJ | 48 | 50 | 49 | 14 | 41 | 14 | — | — | — | — | — | — | — | — | — | — | — | 12 | 11 | 37 | 55 | 119 | 173 | 244 |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | SW 5 | SE 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NNE 11 | NNE 10 | ENE 9 | ENE 9 | ENE 9 |
| kJ | 21 | 13 | 13 | 1 | 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 11 | 10 | 54 | 53 | 53 |
Wind waves Height (m) Direction Period (s) | — | NNE 4 | NNE 4 | N 10 | N 5 | N 5 | N 7 | NNE 8 | NNE 8 | NNE 8 | ENE 13 | E 13 | SE 12 | S 11 | S 11 | S 11 | S 10 | S 10 | S 10 | S 9 | S 9 | S 9 | S 9 | S 9 |
| kJ | — | 7 | 12 | 122 | 51 | 149 | 421 | 800 | 974 | 1557 | 18860 | 24341 | 25767 | 13348 | 11240 | 8082 | 6424 | 4778 | 3738 | 3072 | 2539 | 1850 | 1838 | 1429 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1836 | 2064 | 2106 | 2064 | 1836 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
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