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Surf Forecasts:
Boat Basin Lefts surfForecast / Guam / Guam
48hr Weather and Surf, issued 3 am Sunday 31 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 (31 May):
- Morning surf: Morning surf (31 May, local time) - 3.5ft (1.0m), 10s period with E swell.
- Afternoon surf: Afternoon surf (31 May, local time) - 3.5ft (1.1m), 10s period with E swell.
- Evening surf: Evening surf (31 May, local time) - 3.5ft (1.1m), 10s period with E swell.
The current surf forecast for Boat Basin Lefts at 10AM is: 1.0m 10s primary swell from a East direction and 0.6m 8s secondary swell from a West direction (forecast issued at 03:00am May 31). An open ocean swell of 0.6m 8s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 May) | 3.5ft (1.0m) | 10s |
| Afternoon (31 May) | 3.5ft (1.1m) | 10s |
| Evening (31 May) | 3.5ft (1.1m) | 10s |
Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 2mm), mostly falling on Sun afternoon. Warm (max 29°C on Sun morning, min 27°C on Sun night). Wind will be generally light. | ||||||||||||||||||||||||
Sunday 31 | Monday 1 | Tuesday 2 | ||||||||||||||||||||||
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 | 7 PM | 10 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | W 10 | W 10 | W 10 | E 9 | W 10 | W 10 | W 10 | W 10 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | |
161 | 158 | 158 | 194 | 194 | 230 | 230 | 230 | 230 | 125 | 123 | 125 | 211 | 162 | 138 | 133 | 100 | 164 | 164 | 164 | 162 | 164 | 132 | 133 | |
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 | 6:10AM0.84m | 9:20PM0.85m | 6:43AM0.83m | 10:01PM0.86m | 7:18AM0.83m | |||||||||||||||||||
Low Tide | 1:28AM0.67m | 1:44PM0.09m | 2:10AM0.68m | 2:20PM0.08m | 2:50AM0.69m | 2:58PM0.08m | ||||||||||||||||||
 | |  | | | |  | | | | | | | | | | | | |  | |  |  | | |
 | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:44 | — | — | — | — | — | — | — | 6:44 | — | — | — | — | — | — | — | 6:45 | — | — |
— | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | |
Temp °C | 27 | 27 | 27 | 28 | 29 | 28 | 28 | 27 | 27 | 27 | 27 | 28 | 29 | 28 | 28 | 27 | 27 | 27 | 27 | 28 | 29 | 29 | 28 | 27 |
30 | 29 | 29 | 29 | 31 | 29 | 30 | 29 | 29 | 29 | 29 | 29 | 30 | 29 | 31 | 29 | 30 | 30 | 31 | 31 | 31 | 32 | 31 | 31 | |
Swell 1 Height (m) Direction Period (s) | W 8 | SW 8 | SW 8 | SW 8 | SW 8 | W 9 | W 9 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 |
 kJ | 52 | 55 | 54 | 55 | 55 | 74 | 78 | 106 | 127 | 125 | 123 | 125 | 94 | 162 | 138 | 133 | 100 | 164 | 164 | 164 | 162 | 164 | 132 | 133 |
Swell 2 Height (m) Direction Period (s) | SW 8 | W 8 | W 8 | W 8 | W 9 | SW 8 | WSW 8 | SW 8 | SW 8 | E 10 | E 10 | E 10 | WNW 12 | E 9 | E 9 | E 9 | E 9 | W 10 | W 10 | W 10 | WNW 10 | WNW 11 | WNW 11 | WNW 10 |
| kJ | 53 | 49 | 49 | 50 | 36 | 51 | 45 | 31 | 29 | 68 | 68 | 67 | 47 | 63 | 63 | 61 | 61 | 96 | 71 | 71 | 80 | 88 | 90 | 83 |
Swell 3 Height (m) Direction Period (s) | NE 11 | NE 12 | NE 12 | NE 12 | NE 12 | NE 12 | NE 11 | NNE 11 | NNE 11 | SW 8 | NNE 11 | NE 11 | NE 11 | NE 11 | NE 11 | NE 11 | NE 11 | SW 8 | WSW 8 | WSW 8 | NE 10 | WSW 8 | WSW 7 | WSW 7 |
| kJ | 64 | 65 | 66 | 66 | 66 | 66 | 63 | 48 | 48 | 28 | 47 | 30 | 30 | 30 | 30 | 29 | 29 | 16 | 11 | 11 | 25 | 11 | 11 | 10 |
Wind waves Height (m) Direction Period (s) | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 6 | E 6 | E 6 | E 9 | E 6 | E 6 | E 7 | E 7 | — | — | — | — | — | — | — |
| kJ | 161 | 158 | 158 | 194 | 194 | 230 | 230 | 230 | 230 | 60 | 62 | 62 | 211 | 64 | 65 | 69 | 69 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 20 | 20 | 1373 | 20 | 20 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 1290 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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