Threes surfForecast / Guam / Guam

information circle48hr Weather and Surf, issued 3 am Thursday 21 May 2026 ChST
Forecast update in hr  min  s Forecast update imminent
Threes surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Threes sea temperature is
28.8° C
(Which is normal for this time of year)

How big are the waves at Threes today?

The current surf forecast for Threes at 8AM is: 0.1m 10s primary swell from a Northeast direction (forecast issued at 03:00am May 21). An open ocean swell of 0.1m 9s is not directed at the surf break, a second open ocean swell of 2.1m 9s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (ChST) & DateWave HeightWave Period
Morning (21 May)0.5ft (0.1m)10s
Afternoon (21 May)0.5ft (0.1m)12s
Evening (21 May)0.5ft (0.1m)12s

Table - waves today at Threes. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 27mm), heaviest during Sat morning. Warm (max 28°C on Thu morning, min 27°C on Thu afternoon). Mainly fresh winds.

Thursday
21
Friday
22
Saturday
23
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)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.1
N
10
0.1
NE
10
0.1
N
13
0.1
NE
9
0.1
NE
12
0.1
NE
12
0.1
N
12
0.1
NE
12
0.1
NE
11
0.1
NE
11
0.1
NE
11
0.2
NNE
11
0.2
NNE
11
0.2
NNE
10
0.2
NNE
10
0.2
NNE
10
0.2
NNE
10
0.2
NNE
10
0.2
NNE
10
0.2
NNE
10
0.2
NNE
9
0.1
NE
9
0.2
NNE
9
0.2
NNE
9
Wave Graph
Metric surfscale
Energy kJ
2
4
4
3
6
6
3
6
5
5
5
11
11
10
9
10
10
9
9
9
8
3
8
8
Wind (km/h)
30
ENE
30
ENE
30
ENE
30
ENE
25
E
25
E
25
E
25
ENE
25
E
25
E
25
E
25
E
25
E
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
20
ENE
25
ENE
25
ENE
30
ENE
25
E
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-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
off
High Tide
00:09AM0.77m
9:37AM0.71m
1:07AM0.76m
10:41AM0.65m
2:01AM0.75m
12:03PM0.58m
Low Tide
5:07AM0.54m
5:19PM-0.16m
6:24AM0.52m
6:17PM-0.08m
7:46AM0.46m
7:17PM0.02m
part cloud
clear
clear
part cloud
part cloud
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
clear
thunderstorm
thunderstorm
part cloud
thunderstorm
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:54
5:54
5:54
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:40
6:40
6:40
1
1
1
1
1
1
1
2
2
4
3
Temp °C
27
27
27
28
28
28
27
27
27
27
27
28
28
28
27
27
27
27
27
27
27
27
27
27
26
27
27
28
29
29
28
28
28
28
28
29
29
29
28
28
28
28
28
28
28
27
27
28
Swell 1
Height (m)
Direction
Period (s)
0.1
N
10
0.1
NE
10
0.1
NE
10
0.1
NE
9
0.1
N
9
0.1
NE
9
0.1
NE
9
0.1
NE
9
0.1
SE
12
0.1
NE
11
0.1
NE
11
0.2
NNE
11
0.2
NNE
11
0.2
NNE
10
0.2
NNE
10
0.2
NNE
10
0.2
NNE
10
0.2
NNE
10
0.2
NNE
10
0.2
NNE
10
0.2
NNE
9
0.1
NE
9
0.2
NNE
9
0.2
NNE
9
Energy kJ
2
4
4
3
2
3
3
3
6
5
5
11
11
10
9
10
10
9
9
9
8
3
8
8
Swell 2
Height (m)
Direction
Period (s)
0.1
S
9
0.1
S
9
0.1
S
9
0.1
S
9
0.1
NE
12
0.1
NE
12
0.1
N
12
0.1
NE
12
0.1
NE
11
0.1
SE
12
0.1
N
9
0.2
NNE
11
0.1
S
11
0.1
S
11
0.1
S
10
0.1
S
10
0.1
S
10
0.1
S
10
0.1
S
10
0.1
S
10
0.1
S
10
0.1
S
12
Energy kJ
2
2
2
2
6
6
3
6
5
6
1
11
2
2
2
2
2
2
2
2
2
3
Swell 3
Height (m)
Direction
Period (s)
0.1
N
13
0.1
S
9
0.1
S
9
0.1
S
8
0.1
S
8
0.1
N
9
0.1
N
9
0.1
N
9
0.1
E
16
0.1
E
16
0.1
E
16
Energy kJ
3
2
2
1
1
2
1
2
5
5
5
Wind waves
Height (m)
Direction
Period (s)
2.1
E
9
2.1
E
9
2.1
E
9
2.1
E
9
2
E
9
1.9
E
9
1.9
E
9
1.8
E
9
1.7
E
9
1.7
E
9
1.7
E
9
1.6
E
9
1.6
E
9
1.7
E
9
1.7
E
9
1.7
E
9
1.7
E
9
1.7
E
9
1.7
E
9
1.6
E
9
1.6
E
9
1.7
E
9
1.7
E
9
1.8
E
9
Energy kJ
683
683
699
699
635
588
580
521
465
465
465
413
404
452
452
452
455
455
455
399
408
465
455
498
Nearest Offshore or Glassy
Rating
(10 max)
1
1
2
2
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
1810
1810
1810
1810
1838
1886
1810
1810
1810
1810
1810
1810
1810
1838
1810
1810
1810
1810
1810
1810
1810
1838
1838
1833
Best forecast wave conditions in Guam
Rating
(10 max)
Best forecast wave conditions in Guam
Rating
(10 max)
Header Global
Rating
(10 max)
4
5
5
5
5
5
5
5
5
5
4
4
5
7
8
7
6
5
5
5
5
6
8
9
  • 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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