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Surf Forecasts:
Boat Basin Lefts surfForecast / Guam / Guam
48hr Weather and Surf, issued 9 am Monday 25 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
28.4° C
(Which is slightly cooler than normal)How big are the waves at Boat Basin Lefts today?
The current surf forecast for Boat Basin Lefts at 2PM is: 1.5m 7s primary swell from a East direction and 0.1m 11s secondary swell from a North direction (forecast issued at 09:00am May 25). An open ocean swell of 0.1m 14s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (25 May) | 4.5ft (1.4m) | 8s |
| Afternoon (25 May) | 5ft (1.5m) | 7s |
| Evening (25 May) | 5ft (1.6m) | 7s |
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 39mm), heaviest during Wed night. Warm (max 28°C on Mon morning, min 25°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||||
Monday 25 | Tuesday 26 | Wednesday 27 | Thu 28 | |||||||||||||||||||||
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 8 | E 7 | E 7 | E 7 | E 7 | E 7 | E 8 | E 8 | N 11 | E 8 | N 10 | N 10 | N 10 | N 10 | NNE 13 | NNE 12 | NNE 12 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | |
247 | 206 | 236 | 226 | 257 | 264 | 302 | 287 | 84 | 270 | 73 | 75 | 75 | 75 | 93 | 89 | 164 | 348 | 348 | 343 | 334 | 334 | 328 | 247 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | off | off | off | |
High Tide | 3:18PM0.68m | 3:46AM0.88m | 4:54PM0.70m | 4:15AM0.87m | 6:09PM0.74m | |||||||||||||||||||
Low Tide | 10:00AM0.47m | 9:03PM0.44m | 10:47AM0.38m | 10:00PM0.52m | 11:27AM0.30m | 10:57PM0.59m | ||||||||||||||||||
 |  | | |  | |  | | | |  | |  | | | | | | |  | | | | | |
 | 5:52 | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 |
 | — | — | — | 6:42 | — | — | — | — | — | — | — | 6:42 | — | — | — | — | — | — | — | 6:43 | — | — | — | 6:43 |
— | 2 | — | — | 1 | 1 | — | — | 2 | 1 | 1 | — | — | 1 | 3 | 2 | 4 | 1 | — | — | 1 | — | 2 | 12 | |
Temp °C | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 26 | 26 | 25 |
30 | 29 | 28 | 29 | 28 | 28 | 29 | 29 | 28 | 28 | 27 | 26 | 27 | 27 | 28 | 28 | 27 | 26 | 27 | 28 | 27 | 27 | 28 | 29 | |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 14 | SE 14 | SE 14 | N 12 | N 12 | N 11 | N 11 | N 11 | N 10 | N 10 | N 10 | N 10 | N 10 | NNE 13 | NNE 12 | NNE 12 | NNE 12 | NNE 12 | NNE 12 | NNE 11 | NNE 11 | NNE 11 | NNE 11 |
 kJ | 3 | 8 | 8 | 8 | 12 | 25 | 41 | 59 | 84 | 76 | 73 | 75 | 75 | 75 | 93 | 89 | 164 | 161 | 156 | 150 | 111 | 107 | 107 | 107 |
Swell 2 Height (m) Direction Period (s) | SE 14 | NE 7 | N 11 | N 13 | SE 14 | SE 14 | SE 14 | SE 14 | NE 15 | S 6 | NNE 14 | NNE 14 | NNE 13 | NNE 14 | N 10 | N 10 | SSW 7 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 9 | SW 8 |
| kJ | 8 | 2 | 2 | 3 | 8 | 8 | 8 | 7 | 9 | 10 | 37 | 73 | 70 | 73 | 50 | 50 | 4 | 18 | 17 | 32 | 31 | 32 | 36 | 55 |
Swell 3 Height (m) Direction Period (s) | NE 7 | N 11 | N 7 | N 11 | N 10 | N 10 | N 10 | — | SE 14 | NNE 14 | SE 13 | SE 13 | SW 8 | SW 7 | SSW 7 | SSW 7 | SE 13 | SE 13 | SE 13 | SE 13 | ESE 12 | ESE 12 | SE 12 | E 10 |
| kJ | 2 | 2 | 1 | 2 | 2 | 2 | 2 | — | 7 | 20 | 7 | 7 | 2 | 2 | 5 | 5 | 7 | 7 | 7 | 6 | 15 | 14 | 6 | 33 |
Wind waves Height (m) Direction Period (s) | E 8 | E 7 | E 7 | E 7 | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 |
| kJ | 247 | 206 | 236 | 226 | 257 | 264 | 302 | 287 | 301 | 270 | 293 | 307 | 320 | 328 | 315 | 304 | 311 | 348 | 348 | 343 | 334 | 334 | 328 | 247 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1290 | 1290 | 1290 | 1290 | 1836 | 1290 | 1290 | 24 | 20 | 0 | 1290 | 1885 | 24 | 20 | 20 | 20 | 0 | 0 | 2069 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
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