Boat Basin Lefts Surf Break

Lat Long: 13.48° N 144.75° E

GUAM

Boat Basin Lefts 48 hour detailed Surf Forecast

Issued: 9 am 04 Sep 2026 (local time)

Forecast update in  hr  min

Today's Boat Basin Lefts sea temperature is
29.7°C
0.4° 

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 (04 Sep):

  • Morning surf: Morning surf (04 Sep, local time) - 7ft (2.1m), 9s period with W swell.
  • Afternoon surf: Afternoon surf (04 Sep, local time) - 6ft (1.9m), 9s period with W swell.
  • Evening surf: Evening surf (04 Sep, local time) - 6ft (1.8m), 9s period with W swell.

The current surf forecast for Boat Basin Lefts at 4PM is: 1.9m 9s primary swell from a West direction (forecast issued at 09:00am September 04). An open ocean swell of 0.4m 8s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (ChST) & DateWave HeightWave Period
Morning (04 Sep)7ft (2.1m)9s
Afternoon (04 Sep)6ft (1.9m)9s
Evening (04 Sep)6ft (1.8m)9s

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


Short Range Forecast

Moderate rain (total 13mm), heaviest on Sun morning. Warm (max 29°C on Fri morning, min 26°C on Sun morning). Wind will be generally light.

Friday
4
Saturday
5
Sunday
6
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
0
1
0
0
0
0
0
0
0
0
2
1
1
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)
2.1
W
9
2.1
W
9
1.9
W
9
1.9
W
9
1.8
W
9
1.7
W
9
1.7
W
9
1.6
W
9
1.6
W
9
1.6
W
9
1.5
W
9
1.4
WNW
9
1.3
W
9
1.2
W
8
1.2
W
8
1.3
W
8
1.3
W
8
1.3
WNW
10
1.3
WNW
10
1.3
WNW
10
1.5
WNW
10
1.4
WNW
10
Wave Graph
Metric surfscale
Energy kJ
771
734
606
588
515
461
461
404
413
440
388
326
263
210
205
239
239
342
328
322
458
370
Wind (km/h)
20
SW
25
SW
25
WSW
25
WSW
15
WSW
15
WSW
15
WSW
15
W
10
W
10
W
10
W
10
WNW
5
WSW
5
WSW
10
WNW
15
WNW
15
NW
10
NW
15
NW
20
NW
20
NW
15
NNW
Wind State
cross
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
glassy
cross-on
cross-on
on
on
on
on
on
on
cross-on
High Tide
2:25PM0.75m
11:51PM0.87m
4:09PM0.77m
00:49AM0.85m
5:24PM0.81m
Low Tide
6:50AM0.18m
6:28PM0.68m
7:58AM0.15m
7:54PM0.72m
9:09AM0.13m
9:37PM0.73m
part cloud
clear
part cloud
part cloud
part cloud
part cloud
part cloud
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
cloud
part cloud
thunderstorm
mod rain
cloud
cloud
cloud
part cloud
<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>
6:30
6:30
6:29
 mm
1
2
1
1
1
1
6
Temp °C
28
29
29
29
28
28
28
28
28
28
29
29
28
28
28
28
28
28
26
26
27
27
Feels °C
30
30
29
30
30
31
31
31
32
31
33
33
33
33
32
31
31
31
27
27
28
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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