Boat Basin Lefts Surf Break
GUAM

Boat Basin Lefts 48 hour detailed Surf Forecast

Lat Long: 13.48° N 144.75° E

Issued: 9 pm 04 Jul 2026 (local time)

Forecast update in  hr  min

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

Slightly warmer than usual

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 (05 Jul):

  • Morning surf: Morning surf (05 Jul, local time) - 11ft (3.5m), 14s period with E swell.
  • Afternoon surf: Afternoon surf (05 Jul, local time) - 11ft (3.5m), 15s period with E swell.
  • Evening surf: Evening surf (05 Jul, local time) - 15ft (4.5m), 15s period with E swell.

The current surf forecast for Boat Basin Lefts at 2AM is: 3.0m 15s primary swell from a East direction and 1.3m 6s secondary swell from a North-northeast direction (forecast issued at 09:00pm July 04). An open ocean swell of 0.3m 9s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (ChST) & DateWave HeightWave Period
Morning (05 Jul)11ft (3.5m)14s
Afternoon (05 Jul)11ft (3.5m)15s
Evening (05 Jul)15ft (4.5m)15s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 141mm), heaviest during Sun night. Warm (max 29°C on Sat night, min 26°C on Sun night). Winds increasing (fresh winds from the NNE on Sat night, stormy winds from the SW by Mon morning).

Sat
4
Sunday
5
Monday
6
Tuesday
7
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
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
!
0
0
0
0
0
0
0
1
1
0
2
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)
2.5
E
15
3
E
16
3
E
15
3.5
ENE
14
3.5
ENE
15
3.5
E
14
3.5
E
14
4
E
15
4
E
15
4.5
ENE
15
4.5
ENE
15
4.5
NE
15
5
NNE
14
5
N
13
4.5
NNW
13
3.5
NNW
12
2.5
NNW
12
2.1
NW
12
3.5
W
11
3.5
W
12
2.5
W
11
3
W
12
0.3
ENE
8
3
W
12
Wave Graph
Metric surfscale
Energy kJ
2679
4765
3778
4181
5762
4704
5067
6156
7933
8249
8635
9459
9883
9576
6395
3352
1906
1240
2764
3200
1719
2693
14
2346
Wind (km/h)
30
N
30
NNE
30
NNE
30
N
35
N
35
N
40
N
45
N
45
NNW
55
NW
70
WNW
85
W
95
WSW
100
SW
90
SW
80
SW
65
SW
60
SSW
55
SSW
50
S
45
S
45
S
45
S
35
SSW
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
cross-on
cross-on
cross
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
11:46PM0.88m
10:00AM0.76m
00:09AM0.89m
11:03AM0.72m
00:33AM0.89m
12:23PM0.69m
Low Tide
4:25PM0.18m
5:28AM0.61m
4:59PM0.25m
6:19AM0.55m
5:34PM0.33m
7:12AM0.47m
thunderstorm
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
heavy rain
mod rain
thunderstorm
thunderstorm
rain showers
rain showers
rain showers
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:58
5:58
5:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:52
6:52
6:52
 mm
1
1
1
1
3
4
4
7
4
17
11
28
22
12
9
1
1
1
2
3
3
2
2
Temp °C
29
29
29
29
29
29
29
27
27
27
26
26
26
26
26
27
27
27
27
28
28
28
29
29
Feels °C
30
30
29
29
28
28
28
25
25
22
18
16
14
13
15
17
20
21
22
24
25
25
26
28
Swell 1
Height (m)
Direction
Period (s)
2.5
E
15
3
E
16
3
E
15
3.5
ENE
14
3.5
ENE
15
3.5
E
14
3.5
E
14
4
E
15
4
E
15
4.5
ENE
15
4.5
ENE
15
4.5
NE
15
5
NNE
14
5
N
13
4.5
NNW
13
3.5
NNW
12
2.5
NNW
12
2.1
NW
12
3.5
W
11
3.5
W
12
2.5
W
11
3
W
12
0.3
ENE
8
3
W
12
Energy kJ
2679
4765
3778
4181
5762
4704
5067
6156
7933
8249
8635
9459
9883
9576
6395
3352
1906
1240
2764
3200
1719
2693
14
2346
Swell 2
Height (m)
Direction
Period (s)
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.2
SSE
10
0.3
SE
10
2.3
NNE
9
2.5
N
10
3.5
NE
14
0.2
SSE
10
0.3
SE
10
0.4
ENE
10
0.4
ENE
10
0.3
ENE
9
1.7
NW
12
0.3
ENE
9
1.7
WNW
13
0.3
ENE
8
0.1
N
10
0.3
ENE
8
Energy kJ
22
22
23
9
15
826
1351
4435
10
16
41
38
17
854
15
998
14
2
13
Swell 3
Height (m)
Direction
Period (s)
0.4
NE
10
0.4
NE
10
0.1
NE
12
0.4
NE
9
0.1
N
11
0.3
ENE
8
0.1
N
10
0.1
N
10
0.1
N
10
Energy kJ
27
25
6
21
2
14
2
2
2
Wind waves
Height (m)
Direction
Period (s)
0.4
NNE
10
0.4
NNE
10
1.3
NNE
6
0.3
NNE
10
0.3
NNE
10
1.7
N
6
2
N
7
2.4
N
7
3
N
8
3
N
8
3
NW
7
4.5
WNW
8
5.5
W
9
6.5
WSW
10
6
WSW
10
6
WSW
10
5.5
SW
10
5
SW
10
3.5
SSW
9
3
SSW
9
3
S
9
3
S
9
4
WSW
12
2.5
S
9
Energy kJ
34
33
106
19
19
221
353
611
892
1338
979
2648
5167
8427
6697
6786
5967
5525
1723
1362
1345
1215
4287
1138
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
2
2
2
2
3
3
2
2
3
3
3
3
3
2
2
Distance (km)
1290
1290
1290
1290
1290
1290
1290
1836
1836
1836
1836
1836
1836
1836
1836
1864
1864
1836
1836
1836
1836
1836
1864
1864
Best forecast wave conditions in Guam
Rating
(10 max)
Best forecast wave conditions in Guam
Rating
(10 max)
Header Global
Rating
(10 max)
5
5
5
5
5
5
9
9
9
8
7
5
5
6
5
5
5
5
9
8
8
8
7
5
  • 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
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