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Surf Forecasts:
Boat Basin Lefts surfForecast / Guam / Guam
48hr Weather and Surf, issued 3 am Tuesday 12 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
28.6° 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 11AM is: 1.5m 9s primary swell from a East direction (forecast issued at 03:00am May 12). An open ocean swell of 0.1m 12s is not directed at the surf break, a second open ocean swell of 0.1m 9s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 May) | 5ft (1.5m) | 9s |
| Afternoon (12 May) | 5ft (1.5m) | 9s |
| Evening (12 May) | 4.5ft (1.4m) | 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 23mm), heaviest during Tue night. Warm (max 29°C on Tue morning, min 27°C on Tue night). Wind will be generally light. | ||||||||||||||||||||||||
Tuesday 12 | Wednesday 13 | Thursday 14 | ||||||||||||||||||||||
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 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 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | |
464 | 464 | 392 | 383 | 382 | 373 | 325 | 325 | 280 | 280 | 280 | 239 | 241 | 241 | 202 | 202 | 202 | 202 | 168 | 168 | 166 | 166 | 162 | 162 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | cross-off | cross-on | on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 3:57AM0.86m | 3:41PM0.69m | 4:24AM0.88m | 5:10PM0.74m | 4:52AM0.90m | 6:23PM0.81m | ||||||||||||||||||
Low Tide | 10:29AM0.50m | 9:42PM0.41m | 11:09AM0.39m | 10:42PM0.47m | 11:49AM0.26m | |||||||||||||||||||
 | |  | |  | |  | | | | | | | | | | | | |  | | |  | | |
 | — | 5:56 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:37 | — | — | — | — | — | — | — | 6:38 | — | — | — | — | — | — | — | 6:38 | — | — |
1 | 1 | 5 | 2 | — | — | — | 1 | 4 | 2 | 1 | — | — | — | 1 | 1 | 2 | 1 | 2 | — | — | — | — | — | |
Temp °C | 27 | 27 | 28 | 28 | 29 | 29 | 28 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 28 | 29 | 29 | 28 | 28 |
30 | 29 | 30 | 29 | 31 | 31 | 31 | 30 | 30 | 30 | 31 | 32 | 32 | 32 | 32 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | |
Swell 1 Height (m) Direction Period (s) | E 10 | E 10 | E 9 | SE 12 | SE 12 | SE 12 | 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 |
 kJ | 464 | 464 | 392 | 5 | 5 | 21 | 325 | 325 | 280 | 280 | 280 | 239 | 241 | 241 | 202 | 202 | 202 | 202 | 168 | 168 | 166 | 166 | 162 | 162 |
Swell 2 Height (m) Direction Period (s) | SE 11 | SE 12 | SE 12 | SE 9 | SE 9 | NW 10 | SE 11 | SE 11 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 5 | SSW 5 | SE 10 | SSW 5 |
| kJ | 5 | 5 | 5 | 3 | 3 | 4 | 19 | 19 | 16 | 15 | 14 | 13 | 13 | 13 | 23 | 22 | 20 | 19 | 12 | 10 | 6 | 5 | 17 | 5 |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | N 11 | N 11 | N 10 | N 10 | NNW 9 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | NNW 8 | NNW 8 | NNW 7 | SE 10 | SE 10 | SE 10 | SE 10 | SE 11 | SE 11 | SE 14 | N 7 |
| kJ | 3 | 3 | 3 | 2 | 2 | 2 | 8 | 8 | 19 | 18 | 18 | 19 | 18 | 12 | 11 | 11 | 16 | 16 | 17 | 17 | 18 | 18 | 29 | 9 |
Wind waves Height (m) Direction Period (s) | — | — | — | E 9 | E 9 | E 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | E 3 | — | — | — | — |
| kJ | — | — | — | 383 | 382 | 373 | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1836 | 1290 | 1290 | 1290 | 1290 | 0 | 0 | 0 | 0 | 0 | 0 | 11 | 11 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 7 | 1290 | 1836 | 0 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
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