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Boat Basin Lefts surfForecast / Guam / Guam
48hr Weather and Surf, issued 9 am Saturday 23 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 5PM is: 1.6m 9s primary swell from a East direction and 0.2m 9s secondary swell from a North-northeast direction (forecast issued at 09:00am May 23). An open ocean swell of 0.1m 10s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 May) | 4.5ft (1.4m) | 9s |
| Afternoon (23 May) | 5ft (1.5m) | 9s |
| Evening (23 May) | 6ft (1.8m) | 6s |
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 40mm), heaviest during Mon night. Warm (max 28°C on Sat morning, min 26°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||||||
Saturday 23 | Sunday 24 | Monday 25 | Tue 26 | |||||||||||||||||||||
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 6 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | N 7 | N 11 | E 9 | E 9 | E 9 | E 9 | E 9 | |
313 | 313 | 364 | 413 | 455 | 260 | 279 | 291 | 287 | 291 | 305 | 283 | 279 | 279 | 273 | 253 | 251 | 1 | 2 | 185 | 154 | 158 | 177 | 175 | |
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 | off | cross-off | cross-off | |
High Tide | 11:57AM0.74m | 2:39AM0.89m | 1:33PM0.69m | 3:15AM0.89m | 3:18PM0.68m | 3:46AM0.88m | ||||||||||||||||||
Low Tide | 7:47AM0.63m | 7:11PM0.24m | 9:00AM0.56m | 8:06PM0.34m | 10:00AM0.47m | 9:03PM0.44m | ||||||||||||||||||
 | | | |  | |  | | | |  | | | |  | | | | | | | | | | |
 | 5:52 | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 |
 | — | — | — | 6:40 | — | — | — | — | — | — | — | 6:42 | — | — | — | — | — | — | — | 6:42 | — | — | — | 6:42 |
1 | 3 | 3 | 1 | 3 | 1 | — | 1 | 2 | 1 | — | 1 | 2 | 1 | — | — | 2 | 3 | 1 | 1 | 2 | 4 | 1 | 3 | |
Temp °C | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 27 | 26 | 26 |
30 | 30 | 29 | 29 | 28 | 27 | 29 | 29 | 29 | 29 | 29 | 30 | 29 | 29 | 29 | 29 | 28 | 27 | 28 | 28 | 29 | 28 | 27 | 28 | |
Swell 1 Height (m) Direction Period (s) | E 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 8 | NNE 8 | N 5 | NNE 8 | NNE 8 | NE 8 | SE 10 | ESE 10 | SE 9 | SE 14 | E 9 | E 9 | E 9 | E 9 | E 9 |
 kJ | 313 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 6 | 2 | 6 | 6 | 2 | 4 | 9 | 13 | 8 | 185 | 154 | 158 | 177 | 175 |
Swell 2 Height (m) Direction Period (s) | NNE 10 | S 10 | S 10 | S 10 | S 10 | S 10 | SE 10 | SE 10 | E 15 | SE 15 | SE 15 | NNE 8 | SE 15 | SE 15 | SE 15 | NE 8 | SE 14 | SE 14 | N 11 | SE 14 | N 12 | N 12 | SSE 6 | SSE 6 |
| kJ | 9 | 2 | 2 | 2 | 2 | 2 | 4 | 4 | 5 | 9 | 9 | 6 | 9 | 9 | 9 | 3 | 8 | 8 | 2 | 8 | 12 | 25 | 60 | 41 |
Swell 3 Height (m) Direction Period (s) | S 10 | — | E 16 | E 16 | — | E 16 | S 12 | E 16 | SE 15 | S 10 | S 10 | SE 15 | — | — | N 10 | SE 15 | NE 8 | N 7 | N 7 | N 13 | SE 14 | SE 14 | N 11 | N 11 |
| kJ | 2 | — | 5 | 5 | — | 5 | 3 | 5 | 9 | 2 | 2 | 9 | — | — | 2 | 9 | 3 | 1 | 1 | 3 | 8 | 8 | 41 | 59 |
Wind waves Height (m) Direction Period (s) | — | E 9 | E 9 | E 9 | E 9 | E 6 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | ESE 7 | ESE 8 | SE 7 | SE 7 | SE 7 | ESE 6 | — |
| kJ | — | 313 | 364 | 413 | 455 | 260 | 279 | 291 | 287 | 291 | 305 | 283 | 279 | 279 | 273 | 253 | 251 | 191 | 270 | 109 | 131 | 127 | 181 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 1836 | 1864 | 1864 | 1864 | 1858 | 1836 | 1836 | 1836 | 1836 | 1908 | 1908 | 1908 | 1836 | 1373 | 1836 | 1836 | 1290 | 1290 | 1290 | 1290 | 0 | 1836 | 24 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
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