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 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Boat Basin Lefts sea temperature is
29.2° 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 (18 Aug):

  • Afternoon surf: Afternoon surf (18 Aug, local time) - 3.5ft (1.1m), 8s period with W swell.
  • Evening surf: Evening surf (18 Aug, local time) - 3.5ft (1.1m), 8s period with W swell.

The current surf forecast for Boat Basin Lefts at 11PM is: 1.0m 8s primary swell from a West direction (forecast issued at 03:00pm August 18). An open ocean swell of 0.4m 9s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (ChST) & DateWave HeightWave Period
Morning (18 Aug)--
Afternoon (18 Aug)3.5ft (1.1m)8s
Evening (18 Aug)3.5ft (1.1m)8s

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


Short Range Forecast

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

Tue
18
Wednesday
19
Thursday
20
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
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
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)
1.1
W
8
1.1
W
8
1.1
W
8
1
W
8
1
W
8
1
W
8
1
W
8
1.1
WNW
8
1.2
WNW
8
1.1
WNW
8
1.1
WNW
8
1
W
8
1
WNW
9
0.9
WNW
8
0.8
WNW
9
0.8
WNW
9
0.8
WNW
9
0.6
WNW
8
0.5
WNW
8
0.5
WNW
8
Wave Graph
Metric surfscale
Energy kJ
160
160
161
133
136
140
140
180
194
184
184
144
144
111
106
106
101
55
40
39
Wind (km/h)
10
NNW
15
N
10
N
10
NNW
15
NNW
15
NNW
20
NNW
25
N
25
N
20
N
15
NNE
15
NNE
10
NE
10
NNE
10
N
10
NNE
15
NNE
20
NNE
15
NE
10
NE
Wind State
cross-on
cross-on
cross-on
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
High Tide
11:57AM0.74m
11:17PM0.87m
1:14PM0.71m
11:43PM0.84m
2:50PM0.69m
Low Tide
5:12PM0.52m
6:29AM0.29m
5:46PM0.59m
7:21AM0.28m
6:24PM0.65m
clear
clear
clear
clear
part cloud
clear
thunderstorm
clear
clear
part cloud
part cloud
part cloud
thunderstorm
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
<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>
6:40
6:39
6:39
 mm
1
2
Temp °C
29
29
28
28
28
28
28
29
29
29
28
28
28
27
28
29
29
29
28
28
Feels °C
32
31
31
31
31
30
29
30
30
31
31
32
33
31
32
33
31
31
31
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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