Boat Basin Lefts Surf Break

Lat Long: 13.48° N 144.75° E

GUAM

Boat Basin Lefts 48 hour detailed Surf Forecast

Issued: 3 am 01 Sep 2026 (local time)

Forecast update in  hr  min

Today's Boat Basin Lefts sea temperature is
29.7°C
0.4° 

Boat Basin Lefts surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Boat Basin Lefts today (01 Sep):

  • Morning surf: Morning surf (01 Sep, local time) - 4.5ft (1.3m), 9s period with W swell.
  • Afternoon surf: Afternoon surf (01 Sep, local time) - 4ft (1.2m), 9s period with WNW swell.
  • Evening surf: Evening surf (01 Sep, local time) - 4.5ft (1.4m), 9s period with W swell.

The current surf forecast for Boat Basin Lefts at 7AM is: 1.3m 9s primary swell from a West direction and 0.5m 11s secondary swell from a Northeast direction (forecast issued at 03:00am September 01). The wind direction is predicted to be onshore.

Time (ChST) & DateWave HeightWave Period
Morning (01 Sep)4.5ft (1.3m)9s
Afternoon (01 Sep)4ft (1.2m)9s
Evening (01 Sep)4.5ft (1.4m)9s

Table - waves today at Boat Basin Lefts. (Swell directed towards the surf break)


Short Range Forecast

Heavy rain (total 26mm), heaviest during Thu afternoon. Warm (max 29°C on Tue morning, min 26°C on Thu morning). Winds increasing (calm on Tue night, fresh winds from the SW by Thu afternoon).

Tuesday
1
Wednesday
2
Thursday
3
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
Rating
(10 max)
0
0
0
1
0
0
1
2
2
2
2
2
1
1
1
2
1
1
1
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.2
W
9
1.2
W
9
1.3
W
9
1.3
W
9
1.2
WNW
9
1.2
WNW
9
1.4
W
9
1.4
W
9
1.4
W
9
1.4
W
9
1.3
W
9
1.3
W
9
1.2
W
9
1.2
W
9
1.3
W
9
1.3
W
9
1.3
W
8
1.3
W
8
1.2
WNW
8
1
WNW
10
1.2
WNW
9
1.2
WNW
11
1.1
WNW
11
1.2
WNW
10
Wave Graph
Metric surfscale
Energy kJ
225
219
257
264
248
259
327
313
306
306
264
264
230
225
258
245
234
235
194
197
242
328
275
298
Wind (km/h)
15
NW
15
NW
15
NW
10
NNW
10
WNW
10
NW
5
N
5
S
5
SW
5
WSW
0
SW
5
W
10
NW
10
NNW
10
NNW
0
NE
10
SW
10
WSW
15
WSW
25
SW
25
SW
30
SW
30
SW
30
WSW
Wind State
on
on
on
on
on
on
cross-on
glassy
glassy
glassy
glassy
glassy
on
on
cross-on
glassy
cross
cross
cross
cross
cross
cross
cross
cross
High Tide
10:27AM0.81m
10:06PM0.89m
11:32AM0.79m
10:34PM0.89m
12:49PM0.76m
Low Tide
4:15AM0.31m
4:10PM0.46m
5:00AM0.25m
4:48PM0.54m
5:51AM0.21m
5:32PM0.62m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:31
6:31
6:30
 mm
1
1
1
1
1
3
1
1
1
2
2
2
4
2
2
Temp °C
28
27
28
28
29
28
28
28
27
27
27
28
29
29
28
28
27
27
27
27
26
27
27
28
Feels °C
31
29
31
31
32
31
32
33
32
31
32
32
33
33
32
33
31
30
30
28
27
27
27
28
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Boat Basin Lefts surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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