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 09 Aug 2026 (local time)

Forecast update in  hr  min

Today's Boat Basin Lefts sea temperature is
29.5° C
0.1° 

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 (10 Aug):

  • Morning surf: Morning surf (10 Aug, local time) - 6.5ft (2.0m), 10s period with W swell.
  • Afternoon surf: Afternoon surf (10 Aug, local time) - 6.5ft (2.0m), 10s period with W swell.
  • Evening surf: Evening surf (10 Aug, local time) - 4.5ft (1.3m), 13s period with WNW swell.

The current surf forecast for Boat Basin Lefts at 12AM is: 2.0m 10s primary swell from a West direction and 0.5m 11s secondary swell from a Northeast direction (forecast issued at 09:00pm August 09). An open ocean swell of 0.4m 9s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (ChST) & DateWave HeightWave Period
Morning (10 Aug)6.5ft (2.0m)10s
Afternoon (10 Aug)6.5ft (2.0m)10s
Evening (10 Aug)4.5ft (1.3m)13s

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


Short Range Forecast

Heavy rain (total 29mm), heaviest during Tue night. Warm (max 29°C on Sun night, min 27°C on Tue night). Mainly fresh winds.

Sun
9
Monday
10
Tuesday
11
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)
2
1
1
1
1
0
0
0
0
0
0
0
0
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)
2.1
W
10
2
W
10
2
W
10
2
W
10
2
W
10
2
W
9
2
W
9
2
W
10
2
W
10
1.4
NW
13
1.4
WNW
12
1.4
WNW
12
2.3
W
11
2.4
W
11
2.1
W
8
2.4
W
9
2.3
W
10
2.2
W
10
Wave Graph
Metric surfscale
Energy kJ
900
802
784
761
730
709
700
725
725
658
500
509
1351
1317
558
841
1146
1048
Wind (km/h)
20
WSW
20
WSW
20
WSW
25
WSW
20
WSW
30
WSW
30
WSW
30
WSW
25
WSW
25
WSW
30
W
30
WSW
25
WSW
30
WSW
30
WSW
25
WSW
25
WSW
25
WSW
Wind State
cross
cross
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross
cross
High Tide
6:40PM0.83m
3:28AM0.89m
7:26PM0.87m
4:39AM0.91m
8:03PM0.90m
Low Tide
10:45PM0.74m
11:34AM0.03m
11:57PM0.72m
12:29PM0.00m
clear
part cloud
part cloud
thunderstorm
clear
clear
part cloud
clear
thunderstorm
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
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>
6:45
6:45
 mm
1
1
1
2
1
2
3
2
2
1
Temp °C
28
28
28
28
29
29
29
29
28
28
28
28
28
28
28
28
28
28
Feels °C
29
29
30
29
30
29
29
29
29
29
29
28
29
28
28
28
29
29
  • 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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