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Surf Forecasts:
Boat Basin Lefts surfForecast / Guam / Guam
48hr Weather and Surf, issued 9 am Thursday 28 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
28.5° C
(Which is normal for this time of year)How big are the waves at Boat Basin Lefts today (28 May):
- Morning surf: Morning surf (28 May, local time) - 4ft (1.2m), 8s period with E swell.
- Afternoon surf: Afternoon surf (28 May, local time) - 4.5ft (1.3m), 9s period with E swell.
- Evening surf: Evening surf (28 May, local time) - 4.5ft (1.3m), 9s period with E swell.
The current surf forecast for Boat Basin Lefts at 4PM is: 1.3m 9s primary swell from a East direction and 0.6m 12s secondary swell from a North-northeast direction (forecast issued at 09:00am May 28). An open ocean swell of 0.9m 10s 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 (28 May) | 4ft (1.2m) | 8s |
| Afternoon (28 May) | 4.5ft (1.3m) | 9s |
| Evening (28 May) | 4.5ft (1.3m) | 9s |
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 28mm), heaviest during Thu night. Warm (max 29°C on Thu morning, min 25°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 28 | Friday 29 | Saturday 30 | Sun 31 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
NNE 11 | E 8 | E 9 | E 9 | E 9 | E 9 | E 8 | E 8 | E 9 | E 10 | E 9 | 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 | |
45 | 190 | 251 | 257 | 356 | 263 | 219 | 165 | 192 | 216 | 211 | 234 | 192 | 196 | 196 | 239 | 196 | 200 | 200 | 200 | 245 | 196 | 196 | 216 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | cross-off | cross-off | off | off | off | off | off | cross-off | cross-off | cross-off | |
High Tide | 4:42AM0.87m | 7:08PM0.78m | 5:10AM0.86m | 7:56PM0.82m | 5:39AM0.85m | 8:39PM0.84m | ||||||||||||||||||
Low Tide | 12:03PM0.23m | 11:52PM0.63m | 12:36PM0.17m | 00:42AM0.66m | 1:09PM0.12m | 1:28AM0.67m | ||||||||||||||||||
 | | |  |  | |  | |  |  | | | | | | | | | | |  | | | | |
 | 5:52 | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 |
 | — | — | — | 6:43 | — | — | — | — | — | — | — | 6:43 | — | — | — | — | — | — | — | 6:44 | — | — | — | 6:44 |
— | — | — | 1 | 2 | 3 | 6 | 2 | 1 | — | — | — | 2 | 4 | 1 | 1 | 2 | 1 | 1 | — | — | 1 | — | — | |
Temp °C | 27 | 28 | 29 | 28 | 28 | 27 | 26 | 25 | 25 | 26 | 27 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 27 | 27 | 27 | 27 |
30 | 29 | 31 | 30 | 31 | 29 | 28 | 29 | 28 | 29 | 30 | 31 | 30 | 30 | 29 | 30 | 30 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | |
Swell 1 Height (m) Direction Period (s) | ESE 8 | SW 8 | SW 8 | SW 10 | E 9 | SW 10 | SW 10 | SW 10 | SW 10 | SW 8 | SW 10 | SW 10 | SW 10 | SW 9 | WSW 9 | WSW 9 | WSW 9 | WSW 9 | WSW 10 | WSW 10 | W 10 | W 10 | W 10 | W 10 |
 kJ | 246 | 53 | 78 | 157 | 225 | 262 | 334 | 334 | 348 | 205 | 450 | 356 | 275 | 159 | 203 | 146 | 176 | 119 | 250 | 260 | 245 | 194 | 194 | 216 |
Swell 2 Height (m) Direction Period (s) | SW 8 | E 10 | NNE 11 | NNE 12 | SW 10 | NNE 12 | NNE 12 | E 8 | E 9 | WSW 12 | NNE 11 | NE 11 | E 10 | E 10 | NE 11 | NE 11 | E 10 | W 11 | NNE 11 | NNE 11 | SW 10 | SW 9 | SW 9 | SW 9 |
| kJ | 53 | 50 | 46 | 98 | 204 | 96 | 94 | 165 | 192 | 278 | 82 | 59 | 192 | 196 | 57 | 57 | 196 | 91 | 45 | 47 | 44 | 83 | 97 | 97 |
Swell 3 Height (m) Direction Period (s) | NNE 11 | NNE 11 | NE 13 | ESE 12 | NNE 12 | SE 12 | SE 12 | NNE 12 | NNE 12 | NNE 11 | SE 11 | SE 11 | NE 11 | WSW 10 | SE 10 | SSW 8 | NE 11 | NNE 11 | SE 10 | SE 10 | NNE 11 | NE 11 | NE 12 | NE 12 |
| kJ | 45 | 45 | 45 | 14 | 96 | 21 | 21 | 93 | 90 | 85 | 18 | 18 | 58 | 82 | 17 | 26 | 57 | 46 | 15 | 15 | 48 | 63 | 65 | 65 |
Wind waves Height (m) Direction Period (s) | — | E 8 | E 9 | E 9 | E 9 | E 9 | E 8 | — | — | E 10 | E 9 | E 10 | — | — | E 10 | E 10 | — | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 |
| kJ | — | 190 | 251 | 257 | 356 | 263 | 219 | — | — | 216 | 211 | 234 | — | — | 196 | 239 | — | 200 | 200 | 200 | 200 | 196 | 196 | 194 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 1836 | 0 | 0 | 0 | 0 | 0 | 0 | 20 | 20 | 20 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
Best forecast wave conditions in Guam | ||||||||||||||||||||||||
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