Goat Island/Mokuauia surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 7 am Thursday 21 May 2026 HST
Forecast update in hr  min  s Forecast update imminent
Goat Island/Mokuauia surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Goat Island/Mokuauia sea temperature is
25.4° C
(Which is normal for this time of year)

Best Forecast Surf Conditions for Goat Island/Mokuauia this week:

The most powerful waves expected at Goat Island/Mokuauia in the next 16 days are 3.0m 9s and forecast to arrive on Thursday (May 21) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 14s period and expected on Thursday (May 21) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11PM (Thu 21st May)10ft (3.0m) 9s

Table - best surf conditions forecast for Goat Island/Mokuauia over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Some drizzle, heaviest during Sat morning. Warm (max 24°C on Thu afternoon, min 22°C on Sat night). Mainly strong winds.

Days 4-6 Weather Summary

Light rain (total 8mm), mostly falling on Sun afternoon. Warm (max 24°C on Sun afternoon, min 23°C on Sun morning). Mainly fresh winds.

Thursday
21
Friday
22
Saturday
23
Sunday
24
Monday
25
Tuesday
26
Wednesday
27
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
1
0
1
1
1
1
2
2
1
1
0
1
1
1
1
1
1
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.5
ENE
8
3
ENE
8
3
ENE
9
2.5
ENE
9
3
ENE
8
2.5
ENE
8
2.5
ENE
8
2.5
ENE
8
2.5
ENE
8
2.5
ENE
8
2.3
ENE
8
2.4
ENE
8
2.3
ENE
8
2.2
ENE
8
2.1
ENE
8
2.2
ENE
7
2.3
ENE
8
2
ENE
8
1.1
NW
14
1.1
NW
13
1
NW
12
Wave Graph
Metric surfscale
Energy kJ
979
1097
1098
905
989
850
982
989
869
869
738
771
638
581
508
537
590
459
416
380
289
Wind (km/h)
40
ENE
40
ENE
35
ENE
35
ENE
40
ENE
35
ENE
40
ENE
40
ENE
35
E
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
30
ENE
30
ENE
35
ENE
30
ENE
30
E
25
ENE
25
E
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
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
High Tide
7:29PM0.66m
6:28AM0.19m
8:24PM0.61m
9:48AM0.25m
9:09PM0.56m
11:14AM0.35m
9:45PM0.51m
12:06PM0.46m
10:11PM0.46m
12:44PM0.55m
10:31PM0.42m
1:16PM0.62m
10:50PM0.39m
Low Tide
10:54AM-0.02m
4:25AM0.14m
11:59AM0.06m
4:17AM0.10m
1:30PM0.14m
4:31AM0.07m
3:15PM0.20m
4:47AM0.03m
4:49PM0.23m
5:04AM-0.02m
6:02PM0.24m
5:23AM-0.05m
7:00PM0.24m
clear
clear
clear
clear
clear
clear
rain showers
clear
part cloud
clear
rain showers
clear
part cloud
clear
rain showers
rain showers
rain showers
rain showers
rain showers
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:50
5:50
5:50
5:50
5:48
5:48
5:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:05
7:06
7:06
7:07
7:07
7:07
7:07
1
1
3
1
2
1
2
Temp °C
23
24
23
23
24
23
23
23
23
23
24
23
24
24
23
24
24
23
23
24
23
19
20
18
18
20
19
19
18
18
18
20
19
20
20
19
21
21
20
21
21
21
Swell 1
Height (m)
Direction
Period (s)
0.4
NW
10
0.4
NW
10
0.4
NW
10
0.4
NNW
10
0.5
NW
11
0.5
NW
11
0.4
NNW
16
0.7
NNW
15
0.7
NW
13
0.8
NW
12
0.7
NW
12
0.6
NW
11
0.5
NW
11
0.5
NW
11
0.4
NW
10
0.4
NW
10
0.6
NW
18
1
NW
15
1.1
NW
14
1.1
NW
13
1
NW
12
Energy kJ
24
24
25
40
57
56
102
191
180
178
144
101
58
56
27
24
194
427
416
380
286
Swell 2
Height (m)
Direction
Period (s)
0.2
SSW
14
0.1
S
16
0.2
SSW
15
0.2
SSW
15
0.2
SSW
14
0.2
NNW
19
0.5
NW
10
0.4
NNW
10
0.4
NW
10
0.2
S
14
0.2
S
13
0.2
S
13
0.1
S
12
0.2
S
13
0.2
S
13
0.3
NW
19
0.3
NW
10
0.2
NNW
9
0.1
NW
9
0.2
S
14
0.2
S
13
Energy kJ
20
5
21
21
18
35
50
39
24
15
14
14
3
14
13
58
15
8
3
15
13
Swell 3
Height (m)
Direction
Period (s)
0.2
S
16
0.1
SW
12
0.1
S
13
0.1
S
12
0.1
S
18
0.2
SSW
13
0.2
SSW
13
0.2
S
16
0.2
S
15
0.2
S
16
0.1
S
16
0.1
S
14
0.1
S
19
0.1
S
13
0.2
S
15
0.2
S
14
0.2
S
14
0.1
SW
16
0.1
SW
16
Energy kJ
20
6
3
3
6
18
17
19
17
21
5
4
7
3
19
16
16
11
10
Wind waves
Height (m)
Direction
Period (s)
2.5
ENE
8
3
ENE
8
3
ENE
9
2.5
ENE
9
3
ENE
8
2.5
ENE
8
2.5
ENE
8
2.5
ENE
8
2.5
ENE
8
2.5
ENE
8
2.3
ENE
8
2.4
ENE
8
2.3
ENE
8
2.2
ENE
8
2.1
ENE
8
2.2
ENE
7
2.3
ENE
8
2
ENE
8
1.8
ENE
7
1.7
ENE
7
1.7
ENE
7
Energy kJ
979
1097
1098
905
989
850
982
989
869
869
738
771
638
581
508
537
590
459
363
297
289
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
3
3
1
1
1
1
2
1
2
1
1
2
1
1
2
2
2
2
Distance (km)
156
158
153
181
181
153
158
158
36
37
153
37
158
154
37
175
154
16
36
36
15
Best forecast wave conditions in Oahu
Rating
(10 max)
2
2
2
2
3
3
2
2
Best forecast wave conditions in United States
Rating
(10 max)
4
2
2
3
3
2
3
2
2
2
1
3
2
1
3
2
2
4
3
2
4
Header Global
Rating
(10 max)
5
7
6
5
6
8
5
5
6
5
5
4
4
5
5
5
5
5
9
8
9
  • Map Icons:
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  • 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 Goat Island/Mokuauia Surf forecast

The above surf forecast table for Goat Island/Mokuauia provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Goat Island/Mokuauia can be found by selecting the local surf guide option on the grey menu. Our Goat Island/Mokuauia 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 (Goat Island/Mokuauia) 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 Goat Island/Mokuauia 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.

Goat Island/Mokuauia is 21 km (13 miles) from Wahiawa. If you plan a vacation in Oahu, look for hotels and other accommodation in Wahiawa. Wahiawa has rooms for a wide range of budgets as well as car hire and transport links.

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