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Surf Forecasts:
Boat Basin Lefts surfForecast / Guam / Guam
48hr Weather and Surf, issued 3 am Monday 04 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
28.0° 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 6AM is: 1.9m 9s primary swell from a East direction and 0.2m 12s secondary swell from a North-northeast direction, 0.1m 14s secondary swell from a North direction (forecast issued at 03:00am May 04). The wind direction is predicted to be cross-offshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (04 May) | 6.5ft (2.0m) | 9s |
| Afternoon (04 May) | 7ft (2.1m) | 9s |
| Evening (04 May) | 7ft (2.1m) | 9s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 21mm), heaviest during Mon morning. Warm (max 28°C on Tue morning, min 26°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||||||
Monday 4 | Tuesday 5 | Wednesday 6 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
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 | ENE 9 | ENE 9 | E 9 | E 9 | E 10 | E 10 | E 10 | E 10 | E 9 | E 10 | |
541 | 517 | 575 | 621 | 627 | 715 | 731 | 747 | 818 | 830 | 830 | 812 | 812 | 812 | 880 | 955 | 961 | 1090 | 1198 | 1319 | 1317 | 1488 | 1561 | 1522 | |
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 | 10:05PM0.86m | 7:53AM0.83m | 10:50PM0.85m | 8:21AM0.81m | 11:38PM0.83m | 8:51AM0.80m | ||||||||||||||||||
Low Tide | 3:09AM0.64m | 3:18PM0.11m | 3:47AM0.66m | 3:56PM0.12m | 4:27AM0.68m | 4:36PM0.14m | ||||||||||||||||||
 | |  | | | |  | |  | |  | | |  | | | | | | | | | | | |
 | — | 5:58 | — | — | — | — | — | — | — | 5:58 | — | — | — | — | — | — | — | 5:58 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:37 | — | — | — | — | — | — | — | 6:37 | — | — | — | — | — | — | — | 6:37 | — | — |
— | — | 1 | 2 | 1 | 2 | 1 | — | — | — | — | 1 | — | — | — | — | 1 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | |
Temp °C | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 27 | 27 | 27 | 26 | 27 | 27 | 27 | 27 | 27 | 27 |
28 | 27 | 27 | 27 | 27 | 27 | 28 | 27 | 28 | 27 | 27 | 26 | 27 | 27 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 26 | |
Swell 1 Height (m) Direction Period (s) | NNE 13 | NNE 13 | NNE 12 | NNE 12 | NNE 12 | NNE 12 | NNW 10 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | N 7 | N 7 |
 kJ | 17 | 16 | 15 | 15 | 14 | 14 | 11 | 22 | 21 | 19 | 19 | 18 | 8 | 8 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 1 | 1 |
Swell 2 Height (m) Direction Period (s) | NW 10 | NW 10 | N 14 | N 13 | NNW 12 | NNW 11 | NNE 12 | NNE 12 | NNE 11 | NNE 11 | NNE 11 | NNE 11 | NNE 11 | NNE 11 | NNE 11 | NNE 11 | NE 10 | N 10 | N 10 | N 10 | N 10 | N 10 | — | — |
| kJ | 4 | 4 | 4 | 3 | 13 | 12 | 14 | 13 | 13 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 4 | 2 | 2 | 2 | 2 | 2 | — | — |
Swell 3 Height (m) Direction Period (s) | N 9 | N 14 | NW 10 | N 8 | N 8 | N 8 | N 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | 4 | 4 | 1 | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | 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 | ENE 9 | ENE 9 | E 9 | E 9 | E 10 | E 10 | E 10 | E 10 | E 9 | E 10 |
| kJ | 541 | 517 | 575 | 621 | 627 | 715 | 731 | 747 | 818 | 830 | 830 | 812 | 812 | 812 | 880 | 955 | 961 | 1090 | 1198 | 1319 | 1317 | 1488 | 1561 | 1522 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1836 | 1836 | 1836 | 1836 | 1864 | 1864 | 1836 | 1373 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1837 | 1836 | 1836 | 1836 | 1836 | 1836 | 1885 | 1905 | 1836 | 1836 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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