Boat Basin Lefts Surf Break

Lat Long: 13.48° N 144.75° E

GUAM

Boat Basin Lefts 48 hour detailed Surf Forecast

Issued: 3 pm 11 Aug 2026 (local time)

Forecast update in  hr  min

Today's Boat Basin Lefts sea temperature is
29.4° C
0.0° 

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 (11 Aug):

  • Afternoon surf: Afternoon surf (11 Aug, local time) - 6.5ft (2.0m), 11s period with W swell.
  • Evening surf: Evening surf (11 Aug, local time) - 6ft (1.8m), 9s period with W swell.

The current surf forecast for Boat Basin Lefts at 10PM is: 1.8m 9s primary swell from a West direction and 0.8m 12s secondary swell from a West-northwest direction (forecast issued at 03:00pm August 11). An open ocean swell of 0.4m 11s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (ChST) & DateWave HeightWave Period
Morning (11 Aug)--
Afternoon (11 Aug)6.5ft (2.0m)11s
Evening (11 Aug)6ft (1.8m)9s

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


Short Range Forecast

Light rain (total 9mm), mostly falling on Tue afternoon. Warm (max 29°C on Wed morning, min 28°C on Tue afternoon). Wind will be generally light.

Tue
11
Wednesday
12
Thursday
13
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
1
0
0
0
0
0
1
2
2
2
2
2
1
1
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.9
W
11
2
W
11
1.8
W
9
1.8
W
9
1.8
W
9
2
W
11
1
WNW
11
1.8
W
8
1.8
W
8
2
W
10
2
W
10
2.3
WNW
11
2.3
WNW
11
2.3
WNW
11
2.3
WNW
11
2.2
WNW
11
2.1
WNW
10
2.1
WNW
10
2
WNW
11
2
WNW
10
Wave Graph
Metric surfscale
Energy kJ
843
949
528
521
517
900
218
407
418
723
745
1121
1242
1219
1219
1051
907
925
920
858
Wind (km/h)
30
WSW
30
WSW
25
WSW
20
WSW
25
WSW
25
WSW
25
WSW
25
WSW
25
WSW
25
WSW
20
WSW
20
WSW
20
SW
20
WSW
20
WSW
20
SW
20
WSW
20
WSW
15
WSW
15
WSW
Wind State
cross
cross-on
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
High Tide
8:03PM0.90m
5:47AM0.92m
8:36PM0.91m
6:51AM0.92m
9:07PM0.92m
Low Tide
12:29PM0.00m
00:55AM0.68m
1:19PM0.01m
1:47AM0.62m
2:05PM0.06m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:44
6:44
 mm
2
3
2
1
1
1
1
Temp °C
28
28
28
28
28
28
28
29
29
29
28
28
28
28
28
29
29
29
28
28
Feels °C
28
28
29
30
30
29
29
30
30
30
30
31
30
30
30
31
30
31
31
31
  • 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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