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 21 Sep 2026 (local time)

Forecast update in  hr  min

Today's Boat Basin Lefts sea temperature is
29.8°C
0.5° 

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 (21 Sep):

  • Afternoon surf: Afternoon surf (21 Sep, local time) - 2.5ft (0.8m), 10s period with NNW swell.
  • Evening surf: Evening surf (21 Sep, local time) - 2.5ft (0.7m), 11s period with NE swell.

The current surf forecast for Boat Basin Lefts at 10PM is: 0.7m 11s primary swell from a Northeast direction (forecast issued at 03:00pm September 21). An open ocean swell of 0.7m 7s is not directed at the surf break, a second open ocean swell of 0.7m 8s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.

Time (ChST) & DateWave HeightWave Period
Morning (21 Sep)--
Afternoon (21 Sep)2.5ft (0.8m)10s
Evening (21 Sep)2.5ft (0.7m)11s

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


Short Range Forecast

Heavy rain (total 25mm), heaviest during Tue afternoon. Warm (max 29°C on Mon afternoon, min 27°C on Mon night). Wind will be generally light.

Mon
21
Tuesday
22
Wednesday
23
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)
2
1
2
2
1
1
1
1
0
1
0
1
1
1
1
1
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)
0.9
NNW
10
0.7
NE
12
0.7
NE
12
0.7
NE
11
0.9
NNW
10
0.9
NNW
10
0.9
NNW
10
0.8
NNW
10
0.8
NNW
10
0.8
NNW
10
0.8
NNW
10
0.9
NNW
12
0.9
NNW
12
1
NNW
12
1
NNW
12
1
NNW
12
1
NNW
12
1
NNW
12
0.9
NNW
11
0.9
NNW
11
Wave Graph
Metric surfscale
Energy kJ
154
142
137
121
148
160
166
135
133
133
133
226
233
283
278
274
269
260
204
193
Wind (km/h)
15
SSE
15
SSE
20
SSE
20
SSE
20
SSE
25
S
25
SSE
25
SSE
25
S
20
S
20
SSE
20
SSE
25
S
25
S
25
S
20
S
25
S
20
SSW
15
SSW
15
SSW
Wind State
cross-off
cross-off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
5:44PM0.77m
2:29AM0.73m
6:12PM0.80m
3:53AM0.75m
6:34PM0.82m
Low Tide
10:30PM0.68m
10:26AM0.25m
11:22PM0.64m
11:14AM0.25m
thunderstorm
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part cloud
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thunderstorm
thunderstorm
thunderstorm
thunderstorm
cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:17
6:16
6:16
 mm
1
1
1
1
1
3
2
2
1
1
3
3
2
1
Temp °C
29
29
28
28
28
27
28
28
28
28
27
27
27
27
27
28
28
28
28
28
Feels °C
32
31
30
30
30
28
29
29
28
30
29
29
28
28
28
29
29
30
30
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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