Boat Basin Lefts Surf Break

Lat Long: 13.48° N 144.75° E

GUAM

Boat Basin Lefts 48 hour detailed Surf Forecast

Issued: 3 am 23 Sep 2026 (local time)

Forecast update in  hr  min

Today's Boat Basin Lefts sea temperature is
29.9°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 (23 Sep):

  • Morning surf: Morning surf (23 Sep, local time) - 3.5ft (1.0m), 12s period with NNW swell.
  • Afternoon surf: Afternoon surf (23 Sep, local time) - 3.5ft (1.0m), 12s period with NNW swell.
  • Evening surf: Evening surf (23 Sep, local time) - 3ft (0.9m), 11s period with NNW swell.

The current surf forecast for Boat Basin Lefts at 6AM is: 1.0m 12s primary swell from a North-northwest direction (forecast issued at 03:00am September 23). An open ocean swell of 0.8m 7s is not directed at the surf break, a second open ocean swell of 0.6m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (ChST) & DateWave HeightWave Period
Morning (23 Sep)3.5ft (1.0m)12s
Afternoon (23 Sep)3.5ft (1.0m)12s
Evening (23 Sep)3ft (0.9m)11s

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


Short Range Forecast

Heavy rain (total 59mm), heaviest during Fri afternoon. Warm (max 29°C on Wed morning, min 27°C on Wed night). Wind will be generally light.

Wednesday
23
Thursday
24
Friday
25
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
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
Rating
(10 max)
1
1
1
1
1
1
2
1
0
0
1
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
Height Map
Wave
Height (m)
Direction
Period (s)
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
0.8
NNW
11
0.8
NNW
11
0.7
NNW
11
0.7
NNW
10
0.7
NNW
10
0.5
NNW
10
0.5
NNW
10
0.5
NNW
9
0.5
NNW
9
0.5
NNW
9
0.4
NNW
9
0.4
NNW
9
0.4
NNW
9
0.4
ENE
8
0.4
ENE
8
0.4
ENE
8
Wave Graph
Metric surfscale
Energy kJ
233
283
304
299
269
260
204
193
135
133
99
88
86
56
54
50
48
47
32
31
30
27
27
28
Wind (km/h)
15
S
15
S
15
S
20
SSW
20
SSW
20
SSW
15
SSW
15
SW
15
SW
15
WSW
5
WSW
10
SW
15
WSW
20
WSW
15
WSW
15
W
20
W
15
W
20
WSW
20
W
20
W
20
W
15
WNW
15
WNW
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross-on
glassy
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
3:53AM0.75m
6:34PM0.82m
5:02AM0.78m
6:54PM0.84m
6:02AM0.81m
7:13PM0.86m
Low Tide
11:22PM0.64m
11:14AM0.25m
00:01AM0.59m
11:57AM0.26m
00:36AM0.52m
12:37PM0.29m
part cloud
clear
part cloud
part cloud
part cloud
thunderstorm
part cloud
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
part cloud
thunderstorm
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:16
6:15
6:15
 mm
4
1
2
3
6
3
1
4
1
2
5
2
2
4
10
5
Temp °C
28
28
27
29
29
28
28
28
28
28
27
28
29
29
28
28
28
27
27
28
28
28
27
27
Feels °C
31
31
29
31
31
30
31
32
32
31
32
31
31
31
30
31
30
29
29
29
30
30
30
30
  • 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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