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Surf Forecasts:
Boat Basin Lefts surfForecast / Guam / Guam
48hr Weather and Surf, issued 9 am Thursday 30 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
27.9° 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: 1.8m 9s primary swell from a East direction and 0.4m 12s secondary swell from a North-northeast direction (forecast issued at 09:00am April 30). An open ocean swell of 0.1m 11s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 Apr) | 6ft (1.9m) | 9s |
| Afternoon (30 Apr) | 6ft (1.8m) | 9s |
| Evening (30 Apr) | 5.5ft (1.7m) | 9s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 14mm), heaviest on Sat morning. Warm (max 28°C on Thu morning, min 26°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||||||
Thursday 30 | Friday 1 | Saturday 2 | Sun 3 | |||||||||||||||||||||
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 | ENE 9 | E 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | |
575 | 575 | 588 | 529 | 465 | 413 | 413 | 412 | 363 | 355 | 355 | 311 | 347 | 442 | 442 | 453 | 505 | 617 | 724 | 613 | 635 | 650 | 601 | 601 | |
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 | 6:13AM0.87m | 7:49PM0.83m | 6:36AM0.86m | 8:36PM0.85m | 7:01AM0.85m | 9:21PM0.86m | ||||||||||||||||||
Low Tide | 1:06PM0.24m | 1:10AM0.56m | 1:37PM0.18m | 1:52AM0.59m | 2:09PM0.14m | 2:31AM0.62m | ||||||||||||||||||
 | | | |  | | | | | | |  |  | | | | | | | | | |  | | |
 | 6:00 | — | — | — | — | — | — | 6:00 | — | — | — | — | — | — | — | 5:58 | — | — | — | — | — | — | — | 5:58 |
 | — | — | — | 6:36 | — | — | — | — | — | — | — | 6:36 | — | — | — | — | — | — | — | 6:36 | — | — | — | 6:36 |
— | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | 1 | 3 | 3 | 3 | 2 | — | — | |
Temp °C | 26 | 27 | 28 | 28 | 27 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 26 | 26 | 26 |
27 | 27 | 28 | 29 | 29 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 29 | 28 | 27 | 28 | 27 | 27 | 27 | 27 | 28 | 26 | 26 | 26 | |
Swell 1 Height (m) Direction Period (s) | NNE 12 | NNE 12 | NNE 12 | NNE 12 | NNE 11 | NNE 11 | NNE 11 | NNE 11 | NE 11 | NNE 11 | NNE 9 | NNE 8 | NNE 8 | NNE 10 | NE 10 | N 10 | N 10 | N 10 | N 10 | N 10 | N 9 | N 9 | N 9 | N 8 |
 kJ | 81 | 55 | 54 | 53 | 48 | 47 | 46 | 46 | 29 | 22 | 7 | 7 | 6 | 11 | 4 | 2 | 2 | 2 | 8 | 2 | 2 | 2 | 2 | 1 |
Swell 2 Height (m) Direction Period (s) | S 11 | S 11 | S 11 | S 11 | SE 11 | SE 11 | S 11 | SE 10 | SE 10 | SE 10 | NNE 11 | NNE 11 | NNE 11 | SE 10 | SE 10 | SE 10 | N 8 | N 8 | S 10 | S 10 | N 7 | S 9 | S 9 | S 9 |
| kJ | 2 | 2 | 2 | 2 | 4 | 4 | 2 | 4 | 4 | 4 | 11 | 11 | 11 | 4 | 4 | 4 | 1 | 1 | 2 | 2 | 1 | 2 | 2 | 2 |
Swell 3 Height (m) Direction Period (s) | SE 11 | — | — | SE 11 | S 11 | S 11 | S 11 | S 10 | S 10 | S 10 | SE 10 | SE 10 | SE 10 | S 10 | S 10 | N 8 | N 7 | N 7 | N 7 | N 8 | S 10 | N 10 | — | — |
| kJ | 5 | — | — | 5 | 2 | 2 | 2 | 2 | 2 | 2 | 4 | 4 | 4 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 2 | 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 | ENE 9 | E 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 |
| kJ | 575 | 575 | 588 | 529 | 465 | 413 | 413 | 412 | 363 | 355 | 355 | 311 | 347 | 442 | 442 | 453 | 505 | 617 | 724 | 613 | 635 | 650 | 601 | 601 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1373 | 1373 | 1373 | 1836 | 1304 | 1304 | 1304 | 1304 | 1373 | 1373 | 1304 | 1304 | 1304 | 1304 | 1373 | 1373 | 1836 | 1836 | 1304 | 1304 | 1304 | 1373 | 1304 | 1836 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
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