Boat Basin Lefts Surf Break

Lat Long: 13.48° N 144.75° E

GUAM

Boat Basin Lefts 48 hour detailed Surf Forecast

Issued: 9 pm 30 Aug 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 (31 Aug):

  • Morning surf: Morning surf (31 Aug, local time) - 2.5ft (0.7m), 9s period with WNW swell.
  • Afternoon surf: Afternoon surf (31 Aug, local time) - 3ft (0.9m), 10s period with WNW swell.
  • Evening surf: Evening surf (31 Aug, local time) - 4ft (1.2m), 9s period with W swell.

The current surf forecast for Boat Basin Lefts at 6AM is: 0.9m 7s primary swell from a West direction and 0.5m 8s secondary swell from a West-northwest direction (forecast issued at 09:00pm August 30). The wind direction is predicted to be cross-onshore.

Time (ChST) & DateWave HeightWave Period
Morning (31 Aug)2.5ft (0.7m)9s
Afternoon (31 Aug)3ft (0.9m)10s
Evening (31 Aug)4ft (1.2m)9s

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


Short Range Forecast

Light rain (total 5mm), mostly falling on Sun night. Warm (max 29°C on Mon morning, min 27°C on Sun night). Wind will be generally light.

Sun
30
Monday
31
Tuesday
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
Rating
(10 max)
0
0
0
0
0
0
0
1
0
2
1
1
1
1
0
0
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
W
8
1.1
W
8
1
W
8
1
W
7
0.9
W
7
0.7
WNW
9
0.9
WNW
9
0.9
WNW
10
0.9
WNW
9
1.2
W
9
1
WNW
9
1.2
W
9
1.3
W
9
1.1
WNW
9
1.1
WNW
9
1.4
W
9
1.5
W
10
1.6
W
9
Wave Graph
Metric surfscale
Energy kJ
117
138
114
107
88
70
121
166
153
230
169
219
257
211
211
327
398
425
Wind (km/h)
20
NNW
20
N
15
N
10
N
10
NNE
10
N
10
NNW
5
N
5
NW
5
NW
5
W
10
W
10
W
10
W
15
W
10
WNW
5
N
5
E
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
glassy
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-off
High Tide
9:20PM0.89m
9:29AM0.83m
9:42PM0.89m
10:27AM0.81m
Low Tide
3:34AM0.38m
3:33PM0.38m
4:15AM0.31m
4:10PM0.46m
thunderstorm
thunderstorm
clear
thunderstorm
clear
clear
clear
clear
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:32
6:31
 mm
8
1
1
Temp °C
28
28
27
27
27
28
29
29
28
28
28
28
28
29
29
29
28
28
Feels °C
30
30
29
30
30
31
32
33
31
32
32
32
32
32
31
32
32
32
  • 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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