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 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 (12 Aug):

  • Morning surf: Morning surf (12 Aug, local time) - 6ft (1.8m), 10s period with W swell.
  • Afternoon surf: Afternoon surf (12 Aug, local time) - 6ft (1.9m), 10s period with W swell.
  • Evening surf: Evening surf (12 Aug, local time) - 6.5ft (2.0m), 10s period with W swell.

The current surf forecast for Boat Basin Lefts at 2AM is: 1.7m 10s primary swell from a West direction and 0.7m 12s secondary swell from a Northwest direction (forecast issued at 09:00pm August 11). An open ocean swell of 0.4m 10s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (ChST) & DateWave HeightWave Period
Morning (12 Aug)6ft (1.8m)10s
Afternoon (12 Aug)6ft (1.9m)10s
Evening (12 Aug)6.5ft (2.0m)10s

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


Short Range Forecast

Light rain (total 3mm), mostly falling on Tue night. Warm (max 29°C on Wed morning, min 27°C on Tue night). Wind will be generally light.

Tue
11
Wednesday
12
Thursday
13
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
1
1
1
0
0
0
1
1
2
2
2
2
2
2
3
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
W
7
1.6
W
7
1.6
W
9
1.8
W
11
1.8
W
11
1.8
W
10
1.8
W
10
1.9
W
10
1.9
W
10
2
W
10
2.2
WNW
11
2.2
WNW
11
2.2
WNW
11
2.2
WNW
11
2.2
WNW
11
2.2
WNW
11
2.1
WNW
11
2
WNW
11
Wave Graph
Metric surfscale
Energy kJ
240
275
408
741
714
661
623
680
682
802
1194
1132
1071
1080
1142
1163
1027
875
Wind (km/h)
20
W
20
WSW
20
WSW
25
WSW
20
WSW
25
WSW
25
WSW
25
WSW
20
WSW
15
WSW
20
SW
20
SW
20
WSW
20
WSW
20
WSW
20
WSW
15
SW
15
WSW
Wind State
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
00:55AM0.68m
1:19PM0.01m
1:47AM0.62m
2:05PM0.06m
thunderstorm
thunderstorm
clear
clear
thunderstorm
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
clear
thunderstorm
<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>
6:44
6:44
 mm
3
1
1
1
Temp °C
28
28
27
28
28
28
29
29
28
28
29
28
28
29
29
29
28
28
Feels °C
30
30
28
29
30
29
30
30
31
31
31
30
30
31
31
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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