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Surf Forecasts:
Boat Basin Lefts surfForecast / Guam / Guam
48hr Weather and Surf, issued 9 am Wednesday 13 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
28.7° 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: 1.2m 9s primary swell from a East direction and 0.3m 8s secondary swell from a North-northwest direction (forecast issued at 09:00am May 13). The wind direction is predicted to be glassy and the swell rating is 2.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 May) | 4ft (1.2m) | 9s |
| Afternoon (13 May) | 4ft (1.2m) | 9s |
| Evening (13 May) | 3.5ft (1.1m) | 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 20mm), heaviest during Thu morning. Warm (max 30°C on Wed morning, min 27°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||||
Wednesday 13 | Thursday 14 | Friday 15 | Sat 16 | |||||||||||||||||||||
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 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 | E 9 | E 9 | E 9 | E 8 | |
239 | 239 | 241 | 241 | 202 | 202 | 202 | 202 | 201 | 201 | 201 | 201 | 196 | 234 | 234 | 229 | 225 | 225 | 225 | 185 | 185 | 185 | 181 | 239 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | off | glassy | cross-off | off | cross-off | off | off | off | 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 | 4:24AM0.88m | 5:10PM0.74m | 4:52AM0.90m | 6:23PM0.81m | 5:22AM0.91m | 7:28PM0.87m | ||||||||||||||||||
Low Tide | 11:09AM0.39m | 10:42PM0.47m | 11:49AM0.26m | 11:41PM0.53m | 12:30PM0.14m | 00:38AM0.59m | ||||||||||||||||||
 | |  | |  | | | |  | | | |  | | | | | | | | | | | | |
 | 5:54 | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 |
 | — | — | — | 6:38 | — | — | — | — | — | — | — | 6:38 | — | — | — | — | — | — | — | 6:38 | — | — | — | 6:38 |
— | — | — | — | 1 | 3 | 2 | 3 | 1 | — | 5 | — | — | — | 2 | 1 | — | — | — | — | — | — | — | 1 | |
Temp °C | 27 | 29 | 30 | 29 | 28 | 28 | 27 | 27 | 27 | 28 | 29 | 29 | 28 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 |
31 | 33 | 34 | 34 | 32 | 32 | 31 | 30 | 30 | 31 | 32 | 31 | 31 | 30 | 29 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | |
Swell 1 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 | SE 10 | SE 13 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 |
 kJ | 239 | 239 | 241 | 241 | 202 | 202 | 202 | 202 | 201 | 201 | 201 | 201 | 17 | 27 | 39 | 38 | 37 | 37 | 37 | 37 | 36 | 35 | 35 | 21 |
Swell 2 Height (m) Direction Period (s) | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SE 10 | SE 10 | SE 11 | SE 14 | N 7 | S 6 | S 6 | N 7 | S 6 | N 10 | N 10 | N 10 | N 10 | N 10 | N 7 |
| kJ | 13 | 22 | 13 | 12 | 11 | 5 | 5 | 5 | 5 | 17 | 17 | 18 | 29 | 9 | 3 | 3 | 4 | 3 | 8 | 8 | 8 | 8 | 7 | 4 |
Swell 3 Height (m) Direction Period (s) | SE 11 | SE 11 | SE 11 | SE 11 | SE 10 | NNW 7 | SE 10 | SE 10 | SE 10 | N 8 | S 5 | SSW 5 | SSW 5 | SE 10 | N 7 | N 7 | S 6 | N 7 | N 7 | S 6 | S 6 | S 6 | S 6 | N 11 |
| kJ | 18 | 19 | 18 | 18 | 17 | 11 | 16 | 16 | 17 | 5 | 2 | 2 | 2 | 17 | 4 | 4 | 3 | 4 | 4 | 3 | 1 | 1 | 1 | 2 |
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 8 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 196 | 234 | 234 | 229 | 225 | 225 | 225 | 185 | 185 | 185 | 181 | 239 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7 | 2069 | 1836 | 1836 | 1836 | 1836 | 1836 | 1908 | 1908 | 1885 | 1866 | 1836 | 1836 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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