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Surf Forecasts:
Boat Basin Lefts surfForecast / Guam / Guam
48hr Weather and Surf, issued 9 pm Tuesday 28 Apr 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
27.7° 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 4AM is: 1.8m 8s primary swell from a East direction and 0.5m 13s secondary swell from a North-northeast direction, 0.4m 9s secondary swell from a North direction (forecast issued at 09:00pm April 28). The wind direction is predicted to be cross-offshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (29 Apr) | 6ft (1.9m) | 8s |
| Afternoon (29 Apr) | 6.5ft (2.0m) | 9s |
| Evening (29 Apr) | 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 ForecastSome drizzle, heaviest during Fri afternoon. Warm (max 28°C on Wed morning, min 27°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||||||
Tue 28 | Wednesday 29 | Thursday 30 | Friday 1 | |||||||||||||||||||||
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 | 7 AM | 10 AM | 1 PM | 4 PM | |
Swell Height Map |   |    |    |    | ||||||||||||||||||||
E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | 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 | |
392 | 439 | 439 | 454 | 505 | 517 | 586 | 593 | 660 | 645 | 595 | 613 | 562 | 567 | 580 | 516 | 461 | 413 | 408 | 359 | 351 | 356 | 348 | 347 | |
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 | 5:55PM0.76m | 5:49AM0.87m | 6:56PM0.80m | 6:13AM0.87m | 7:49PM0.83m | 6:36AM0.86m | ||||||||||||||||||
Low Tide | 11:40PM0.45m | 12:33PM0.32m | 00:27AM0.51m | 1:06PM0.24m | 1:10AM0.56m | 1:37PM0.18m | ||||||||||||||||||
 | | | |  | | | | | | | | | | | | | | | | | | | | |
 | — | — | — | 6:01 | — | — | — | — | — | — | — | 6:00 | — | — | — | — | — | — | — | 6:00 | — | — | — | — |
 | — | — | — | — | — | — | — | 6:36 | — | — | — | — | — | — | — | 6:36 | — | — | — | — | — | — | — | 6:36 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 |
27 | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 28 | 29 | 28 | 29 | 29 | 28 | 28 | |
Swell 1 Height (m) Direction Period (s) | NNE 13 | NNE 13 | NNE 13 | NNE 13 | NNE 13 | NNE 13 | NNE 13 | NNE 12 | NNE 12 | NNE 12 | NNE 12 | NNE 12 | NNE 12 | NNE 12 | NNE 12 | NNE 11 | NNE 11 | E 9 | E 9 | NNE 11 | NNE 11 | NE 11 | NNE 9 | NNE 9 |
 kJ | 139 | 137 | 98 | 98 | 96 | 96 | 129 | 121 | 57 | 56 | 81 | 81 | 56 | 55 | 54 | 51 | 48 | 413 | 408 | 46 | 45 | 29 | 15 | 8 |
Swell 2 Height (m) Direction Period (s) | N 9 | N 9 | N 9 | N 9 | N 8 | N 9 | S 12 | S 12 | N 8 | N 8 | S 11 | S 11 | S 11 | S 11 | S 11 | S 11 | S 11 | NNE 11 | NNE 11 | S 10 | — | — | NNE 11 | NNE 11 |
| kJ | 26 | 25 | 25 | 27 | 12 | 13 | 3 | 3 | 5 | 5 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 47 | 47 | 2 | — | — | 11 | 11 |
Swell 3 Height (m) Direction Period (s) | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | W 7 | — | S 11 | S 11 | — | — | — | SE 11 | SE 11 | SE 11 | S 11 | S 11 | S 11 | S 10 | S 10 | S 10 | SE 10 | SE 10 |
| kJ | 3 | 3 | 3 | 3 | 3 | 3 | 1 | — | 3 | 2 | — | — | — | 5 | 5 | 5 | 2 | 2 | 2 | 2 | 2 | 2 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | 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 | 392 | 439 | 439 | 454 | 505 | 517 | 586 | 593 | 660 | 645 | 595 | 613 | 562 | 567 | 580 | 516 | 461 | — | — | 359 | 351 | 356 | 348 | 347 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1836 | 1836 | 1836 | 1373 | 1836 | 1836 | 1837 | 1373 | 1373 | 1373 | 1304 | 1373 | 1836 | 1836 | 1373 | 1373 | 1304 | 1304 | 1304 | 1304 | 1304 | 1304 | 1304 | 1304 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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