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Surf Forecasts:
Boat Basin Lefts surfForecast / Guam / Guam
48hr Weather and Surf, issued 9 am Sunday 17 May 2026 ChSTForecast update in hr min s Forecast update imminent
Boat Basin Lefts surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Boat Basin Lefts sea temperature is
28.8° C
(Which is normal for this time of year)How big are the waves at Boat Basin Lefts today?
The current surf forecast for Boat Basin Lefts at 4PM is: 2.0m 9s primary swell from a East direction and 0.2m 9s secondary swell from a North-northeast direction (forecast issued at 09:00am May 17). The wind direction is predicted to be cross-offshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 May) | 6.5ft (2.0m) | 9s |
| Afternoon (17 May) | 6.5ft (2.0m) | 9s |
| Evening (17 May) | 6.5ft (2.0m) | 10s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 5mm), mostly falling on Mon night. Warm (max 28°C on Sun morning, min 27°C on Sun afternoon). Mainly fresh winds. | ||||||||||||||||||||||||
Sunday 17 | Monday 18 | Tuesday 19 | Wed 20 | |||||||||||||||||||||
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 | 1 AM | 4 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
E 9 | E 9 | E 9 | E 9 | E 9 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | |
651 | 734 | 734 | 680 | 695 | 710 | 641 | 652 | 708 | 625 | 612 | 612 | 599 | 599 | 599 | 665 | 670 | 685 | 685 | 619 | 556 | 551 | 556 | 619 | |
Wind (km/h) | ||||||||||||||||||||||||
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 | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 6:33AM0.93m | 9:25PM0.95m | 7:14AM0.94m | 10:22PM0.95m | 7:58AM0.93m | 11:18PM0.94m | ||||||||||||||||||
Low Tide | 1:59PM-0.04m | 2:26AM0.68m | 2:48PM-0.08m | 3:20AM0.71m | 3:38PM-0.07m | |||||||||||||||||||
 | | | |  | | | |  | | | | |  | |  | | | |  | | | | | |
 | 5:54 | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 |
 | — | — | — | 6:39 | — | — | — | — | — | — | — | 6:39 | — | — | — | — | — | — | — | 6:39 | — | — | — | 6:40 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | 1 | 1 | 1 | 1 | — | |
Temp °C | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 |
27 | 28 | 28 | 28 | 28 | 28 | 27 | 28 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 28 | 28 | 29 | 28 | 28 | 28 | 28 | |
Swell 1 Height (m) Direction Period (s) | NNE 10 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | N 9 | N 9 | N 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 |
 kJ | 9 | 9 | 8 | 8 | 8 | 7 | 7 | 7 | 8 | 7 | 7 | 6 | 6 | 6 | 8 | 8 | 8 | 8 | 3 | 8 | 7 | 7 | 7 | 8 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | N 9 | N 9 | N 9 | N 7 | N 9 | N 7 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 2 | 1 | 2 | 1 | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | E 9 | E 9 | E 9 | E 9 | E 9 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 |
| kJ | 651 | 734 | 734 | 680 | 695 | 710 | 641 | 652 | 708 | 625 | 612 | 612 | 599 | 599 | 599 | 665 | 670 | 685 | 685 | 619 | 556 | 551 | 556 | 619 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1836 | 1836 | 2069 | 1907 | 2069 | 1858 | 1836 | 1836 | 1836 | 1836 | 1836 | 1907 | 1836 | 1836 | 1836 | 1836 | 1836 | 1836 | 1905 | 1905 | 1864 | 1837 | 1290 | 1290 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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