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Surf Forecasts:
Boat Basin Lefts surfForecast / Guam / Guam
48hr Weather and Surf, issued 9 pm Friday 29 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 (30 May):
- Morning surf: Morning surf (30 May, local time) - 3.5ft (1.0m), 10s period with E swell.
- Afternoon surf: Afternoon surf (30 May, local time) - 3.5ft (1.0m), 10s period with E swell.
- Evening surf: Evening surf (30 May, local time) - 3ft (0.9m), 10s period with E swell.
The current surf forecast for Boat Basin Lefts at 4AM is: 1.0m 10s primary swell from a East direction (forecast issued at 09:00pm May 29). An open ocean swell of 0.9m 9s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 May) | 3.5ft (1.0m) | 10s |
| Afternoon (30 May) | 3.5ft (1.0m) | 10s |
| Evening (30 May) | 3ft (0.9m) | 10s |
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 Sun night. Warm (max 29°C on Sun morning, min 27°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Fri 29 | Saturday 30 | Sunday 31 | Monday 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 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | |
196 | 196 | 196 | 196 | 196 | 200 | 200 | 200 | 162 | 159 | 159 | 158 | 158 | 158 | 158 | 190 | 230 | 273 | 123 | 158 | 156 | 156 | 156 | 125 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | off | off | off | off | 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 | 7:56PM0.82m | 5:39AM0.85m | 8:39PM0.84m | 6:10AM0.84m | 9:20PM0.85m | 6:43AM0.83m | ||||||||||||||||||
Low Tide | 00:42AM0.66m | 1:09PM0.12m | 1:28AM0.67m | 1:44PM0.09m | 2:10AM0.68m | 2:20PM0.08m | ||||||||||||||||||
 | | |  |  | | |  | | | | | | | | | | |  | | | | | | |
 | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — |
 | — | — | — | — | — | — | — | 6:44 | — | — | — | — | — | — | — | 6:44 | — | — | — | — | — | — | — | 6:44 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | |
Temp °C | 28 | 28 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 28 | 29 | 29 | 28 | 28 | 27 | 27 | 27 | 28 | 29 | 29 |
31 | 30 | 29 | 29 | 29 | 30 | 30 | 30 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 28 | 29 | 29 | 29 | 30 | 31 | |
Swell 1 Height (m) Direction Period (s) | SW 9 | SW 9 | SW 9 | E 10 | E 10 | WSW 8 | W 8 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | SW 8 | W 9 | W 9 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 |
 kJ | 258 | 242 | 182 | 196 | 196 | 108 | 51 | 200 | 162 | 159 | 159 | 158 | 158 | 158 | 55 | 74 | 81 | 123 | 123 | 158 | 156 | 156 | 156 | 125 |
Swell 2 Height (m) Direction Period (s) | E 10 | E 10 | NE 11 | WSW 9 | WSW 8 | NE 11 | SW 8 | W 8 | W 9 | W 9 | W 8 | SW 8 | SW 8 | SW 8 | W 9 | SW 8 | SW 8 | WSW 8 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 |
| kJ | 196 | 196 | 57 | 111 | 120 | 57 | 36 | 71 | 73 | 76 | 52 | 55 | 54 | 55 | 36 | 54 | 50 | 41 | 70 | 68 | 68 | 67 | 65 | 63 |
Swell 3 Height (m) Direction Period (s) | NE 11 | NE 11 | SE 11 | NE 11 | NE 11 | W 11 | NE 11 | SW 8 | SW 8 | SW 8 | SW 8 | W 8 | W 8 | W 8 | NE 12 | NE 12 | NE 11 | NE 11 | SW 8 | NNE 11 | NE 11 | NE 11 | NE 11 | NE 11 |
| kJ | 58 | 57 | 18 | 57 | 57 | 21 | 56 | 31 | 21 | 39 | 54 | 49 | 49 | 50 | 66 | 66 | 63 | 60 | 29 | 47 | 31 | 30 | 30 | 30 |
Wind waves Height (m) Direction Period (s) | — | — | E 10 | — | — | E 10 | E 10 | — | — | — | — | — | — | — | E 10 | E 10 | E 10 | E 10 | E 5 | E 6 | E 6 | E 6 | E 6 | E 6 |
| kJ | — | — | 196 | — | — | 200 | 200 | — | — | — | — | — | — | — | 158 | 190 | 230 | 273 | 69 | 66 | 88 | 78 | 83 | 100 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1304 | 1304 | 1290 | 1290 | 1290 | 20 | 20 | 1290 | 1290 | 20 | 20 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
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