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 23 Aug 2026 (local time)

Forecast update in  hr  min

Today's Boat Basin Lefts sea temperature is
29.3°C
0.0° 

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 Aug):

  • Morning surf: Morning surf (23 Aug, local time) - 4ft (1.2m), 10s period with N swell.
  • Afternoon surf: Afternoon surf (23 Aug, local time) - 4.5ft (1.3m), 11s period with N swell.
  • Evening surf: Evening surf (23 Aug, local time) - 3.5ft (1.1m), 10s period with N swell.

The current surf forecast for Boat Basin Lefts at 4PM is: 1.3m 11s primary swell from a North direction (forecast issued at 09:00am August 23). An open ocean swell of 1.1m 8s is not directed at the surf break, a second open ocean swell of 1.6m 8s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (ChST) & DateWave HeightWave Period
Morning (23 Aug)4ft (1.2m)10s
Afternoon (23 Aug)4.5ft (1.3m)11s
Evening (23 Aug)3.5ft (1.1m)10s

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


Short Range Forecast

Heavy rain (total 49mm), heaviest during Mon night. Warm (max 29°C on Sun morning, min 25°C on Mon night). Mainly fresh winds.

Sunday
23
Monday
24
Tuesday
25
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
0
0
0
0
2
1
0
0
0
0
0
0
0
2
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)
1.2
NNE
10
1.2
N
10
1.3
N
11
1.3
N
11
1.2
N
10
1.1
N
10
1.1
N
11
1
N
11
1
N
10
0.9
NNW
11
0.9
NNW
11
0.9
NNW
11
0.9
NNW
11
0.8
NNW
11
0.8
NNW
11
0.7
NNW
11
0.6
ENE
13
0.6
ENE
13
0.6
ENE
13
0.6
ENE
13
0.6
ENE
13
0.6
ENE
13
Wave Graph
Metric surfscale
Energy kJ
300
284
375
379
305
249
274
229
225
210
167
161
176
138
133
101
141
139
137
135
133
131
Wind (km/h)
20
SW
20
SSW
25
SW
30
SW
25
SW
20
SW
20
SW
15
S
20
SSW
25
SW
25
SW
25
SW
20
SSW
15
SW
10
SW
15
SW
15
SW
20
WSW
20
WSW
20
W
20
W
10
W
Wind State
cross-off
cross-off
cross
cross
cross
cross
cross
cross-off
cross-off
cross
cross
cross-off
cross-off
cross
cross
cross
cross-off
cross
cross-on
cross-on
cross-on
cross-on
High Tide
6:41PM0.76m
2:57AM0.78m
7:12PM0.79m
4:06AM0.79m
7:38PM0.81m
Low Tide
10:19AM0.22m
10:36PM0.71m
11:11AM0.20m
11:37PM0.69m
11:57AM0.17m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
thunderstorm
mod rain
thunderstorm
part cloud
part cloud
clear
thunderstorm
thunderstorm
thunderstorm
mod rain
rain showers
part cloud
clear
part cloud
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:37
6:37
6:37
 mm
1
1
1
3
4
8
3
1
1
5
10
1
1
6
Temp °C
28
29
29
29
28
28
27
27
27
29
29
29
28
28
27
25
26
27
28
28
28
27
Feels °C
30
31
30
30
29
30
29
30
29
31
30
30
30
31
30
28
29
29
29
29
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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