Umatac Surf Break
Lat Long: 13.29° N 144.66° E
GUAM

Umatac Surf Forecast and Surf Report

Weather Forecast for Umatac

Issued: 3 pm 04 Jun 2026 (local time)

Forecast update in  hr  min

Today's Umatac sea temperature is
28.8° C

Normal for this time of year

Umatac surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Umatac surf forecast from 4 Jun 2026:

  • Best quality surf: Monday 8 Jun, 10PM (local time) - 2.5ft (0.8m), 13s period, N swell with offshore winds.
  • Most powerful swell: Tuesday 9 Jun, 7AM (local time) - 3ft (0.9m), 12s period, N swell with 247 kJ wave energy.
  • Next surfable swell (1★+): Thursday 4 Jun, 10PM (local time) - 2ft (0.6m), 10s period with WNW swell.

Best Forecast Surf Conditions for Umatac this week:

The surf forecast for Umatac over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jun 04) at 10PM. The primary swell is predicted to be 0.6m and 10s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Umatac in the next 16 days are 0.9m 12s and forecast to arrive on Tuesday (Jun 09) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 9s period and expected on Friday (Jun 05) at 1PM.

Wave TypeTime (ChST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Thu 4th Jun)2ft (0.6m) 10s
Best Surf10PM (Mon 8th Jun)2.5ft (0.8m) 13s
Most Powerful 7AM (Tue 9th Jun)3ft (0.9m) 12s

Table - best surf conditions forecast for Umatac over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 28°C on Thu afternoon, min 27°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 11mm), heaviest on Mon night. Warm (max 28°C on Sun afternoon, min 27°C on Sun night). Wind will be generally light.

Thu
4
Friday
5
Saturday
6
Sunday
7
Monday
8
Tuesday
9
Wednesday
10
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
1
0
0
0
0
1
1
0
1
1
1
1
1
2
1
2
0
0
1
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)
0.6
WNW
10
0.6
WNW
9
0.5
NW
9
0.4
WNW
9
0.4
NW
9
0.5
NW
10
0.5
NW
10
0.4
NW
9
0.6
N
11
0.7
N
11
0.6
N
11
0.8
N
11
0.8
N
11
0.6
N
13
0.9
N
12
0.9
NNE
12
0.8
NNE
11
0.7
NNE
11
0.7
NNE
10
0.6
NNE
10
0.5
NNE
10
Wave Graph
Metric surfscale
Energy kJ
64
58
42
31
23
49
46
28
89
116
92
163
155
121
235
236
167
123
112
78
54
Wind (km/h)
10
NE
10
E
15
E
15
ESE
15
E
15
E
15
ESE
15
E
15
ESE
15
ESE
15
E
15
E
15
SE
15
E
15
E
20
E
15
E
20
E
20
E
15
E
20
ENE
Wind State
cross-off
cross-off
off
off
off
off
off
off
off
off
off
off
off
off
cross-off
off
cross-off
cross-off
off
cross-off
cross-off
High Tide
11:56PM0.70m
9:04AM0.64m
00:33AM0.70m
9:50AM0.61m
1:08AM0.70m
10:52AM0.57m
1:40AM0.70m
12:13PM0.54m
2:11AM0.70m
1:51PM0.52m
2:42AM0.71m
3:33PM0.53m
3:15AM0.73m
Low Tide
4:09PM-0.07m
4:51AM0.53m
4:46PM-0.04m
5:43AM0.52m
5:26PM-0.00m
6:41AM0.48m
6:10PM0.05m
7:41AM0.41m
6:58PM0.12m
8:38AM0.31m
7:52PM0.21m
9:31AM0.20m
8:52PM0.30m
10:21AM0.08m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
thunderstorm
thunderstorm
clear
rain showers
thunderstorm
clear
thunderstorm
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:52
5:52
5:52
5:52
5:52
5:52
5:54
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:45
6:45
6:45
6:45
6:46
6:46
6:46
 mm
5
1
2
3
1
Temp °C
28
28
28
28
28
28
28
28
28
28
28
28
28
28
28
28
28
28
29
28
28
Feels °C
31
31
30
30
32
30
30
31
30
30
31
30
30
31
31
30
31
30
31
30
30
Swell 1
Height (m)
Direction
Period (s)
0.7
ENE
9
0.7
ENE
9
0.7
ENE
9
0.6
ENE
9
0.6
ENE
9
0.6
E
9
0.5
E
9
0.5
E
9
0.6
N
11
0.7
N
11
0.6
N
11
0.8
N
11
0.8
N
11
0.6
N
11
0.9
N
12
0.9
NNE
12
0.8
NNE
11
0.7
NNE
11
0.7
NNE
10
0.6
NNE
10
0.5
NNE
10
Energy kJ
82
82
86
64
64
59
40
39
89
116
92
163
155
79
235
236
167
123
112
78
54
Swell 2
Height (m)
Direction
Period (s)
0.6
WNW
10
0.6
WNW
9
0.5
NW
9
0.4
WNW
9
0.4
NW
9
0.5
NW
10
0.5
NW
10
0.4
NW
9
0.5
E
9
0.5
E
8
0.5
SE
7
0.4
ENE
8
0.4
ENE
8
0.6
N
13
0.4
ENE
8
0.3
ENE
8
0.3
SE
9
0.3
SE
9
0.3
E
8
0.3
E
8
0.3
SE
9
Energy kJ
64
58
42
31
23
49
46
28
39
36
22
22
22
121
21
12
12
13
11
12
13
Swell 3
Height (m)
Direction
Period (s)
0.3
SE
11
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.4
NW
8
0.4
NE
9
0.4
NE
9
0.4
NE
9
0.4
NW
8
0.4
NW
8
0.5
N
10
0.4
SE
6
0.4
SE
6
0.5
E
8
0.4
SE
9
0.3
SE
9
0.2
S
6
0.3
E
8
0.2
ESE
10
0.3
SE
9
0.3
E
8
Energy kJ
18
16
15
15
17
19
20
19
17
16
48
14
10
32
20
12
3
11
9
13
12
Wind waves
Height (m)
Direction
Period (s)
0.5
E
4
0.4
ESE
4
0.5
SE
7
0.6
ESE
7
0.6
SE
7
0.6
ESE
7
0.6
ESE
7
0.6
SE
7
0.3
ESE
4
0.4
ESE
8
0.5
E
3
0.7
E
4
0.7
E
8
0.7
E
5
0.6
ESE
5
0.6
E
5
0.6
E
4
Energy kJ
6
4
27
35
44
36
35
38
3
26
5
15
60
21
19
21
12
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
1
2
1
1
2
Distance (km)
0
20
20
20
20
0
0
20
0
0
0
0
0
0
1271
0
20
1284
0
20
1284
Best forecast wave conditions in Guam
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
Best forecast wave conditions in Guam
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
Header Global
Rating
(10 max)
4
5
5
5
9
9
9
9
8
7
8
7
6
9
6
5
5
5
5
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)
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Information about the Umatac Surf forecast

The above surf forecast table for Umatac provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Umatac can be found by selecting the local surf guide option on the grey menu. Our Umatac surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Umatac) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Umatac may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Umatac is 22 km (14 miles) from Agana. If you plan a holiday in Guam, look for hotels and other accommodation in Agana. Agana has rooms for a wide range of budgets as well as car hire and transport links.

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