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 19 Aug 2026 (local time)

Forecast update in  hr  min

Today's Boat Basin Lefts sea temperature is
29.1° C
0.2° 

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 (20 Aug):

  • Morning surf: Morning surf (20 Aug, local time) - 2.5ft (0.8m), 9s period with WNW swell.
  • Afternoon surf: Afternoon surf (20 Aug, local time) - 2.5ft (0.7m), 6s period with NE swell.
  • Evening surf: Evening surf (20 Aug, local time) - 2.5ft (0.7m), 6s period with NE swell.

The current surf forecast for Boat Basin Lefts at 4AM is: 0.7m 8s primary swell from a West-northwest direction and 0.6m 6s secondary swell from a Northeast direction, 0.5m 5s secondary swell from a North direction (forecast issued at 09:00pm August 19). The wind direction is predicted to be cross-shore.

Time (ChST) & DateWave HeightWave Period
Morning (20 Aug)2.5ft (0.8m)9s
Afternoon (20 Aug)2.5ft (0.7m)6s
Evening (20 Aug)2.5ft (0.7m)6s

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


Short Range Forecast

Light rain (total 7mm), mostly falling on Wed night. Warm (max 29°C on Thu morning, min 27°C on Wed night). Wind will be generally light.

Wed
19
Thursday
20
Friday
21
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
1
0
0
1
1
1
0
0
0
0
1
3
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
W
8
0.9
W
8
0.8
W
9
0.7
WNW
8
0.7
WNW
9
0.8
WNW
9
0.6
WNW
8
0.7
NE
6
0.7
NE
6
0.8
NE
6
0.6
NE
7
0.6
NE
7
0.6
NE
6
0.6
NE
6
0.6
NE
6
0.8
E
15
1.1
E
12
1.4
E
12
Wave Graph
Metric surfscale
Energy kJ
116
113
96
73
82
103
55
42
42
51
35
35
34
34
34
282
333
544
Wind (km/h)
20
NNE
15
NE
10
NE
10
NE
10
NE
10
ENE
15
NE
15
NE
15
ENE
10
E
5
E
5
ENE
5
ESE
0
SSE
0
W
10
WSW
0
NNW
5
SSW
Wind State
cross
cross
cross
cross
cross
cross-off
cross
cross
cross-off
cross-off
cross-off
glassy
glassy
glassy
glassy
cross
glassy
glassy
High Tide
11:43PM0.84m
2:50PM0.69m
00:13AM0.82m
4:40PM0.70m
Low Tide
5:46PM0.59m
7:21AM0.28m
6:24PM0.65m
8:19AM0.26m
7:23PM0.69m
part cloud
thunderstorm
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
clear
thunderstorm
thunderstorm
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>
6:39
6:38
 mm
2
2
1
Temp °C
28
28
28
27
27
29
29
29
28
28
27
27
27
29
29
29
29
28
Feels °C
31
32
33
31
31
33
32
32
31
32
32
32
32
35
34
33
35
33
  • 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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