Goat Island/Mokuauia Surf Break

Lat Long: 21.66° N 157.92° W

Goat Island/Mokuauia Surf Forecast and Surf Report

Issued: 1 am 21 Jul 2026 (local time)

Forecast update in  hr  min

Today's Goat Island/Mokuauia sea temperature is
26.2° C
0.0° 

Goat Island/Mokuauia surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Goat Island/Mokuauia surf forecast from 21 Jul 2026:

  • Most powerful swell: Monday 27 Jul, 5AM (local time) - 5.5ft (1.7m), 16s period, E swell with 1,361 kJ wave energy.

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 1.7m 16s and forecast to arrive on Monday (Jul 27) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Wednesday (Jul 22) at 11PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5AM (Mon 27th Jul)5.5ft (1.7m) 16s

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


Short Range Forecast

Light rain (total 7mm), mostly falling on Tue morning. Warm (max 26°C on Tue morning, min 24°C on Tue night). Mainly fresh winds.

Days 4-6 Weather Summary

Light rain (total 5mm), mostly falling on Fri morning. Warm (max 25°C on Fri morning, min 24°C on Fri morning). Mainly fresh winds.

Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
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)
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
3
2
2
2
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
ENE
7
1.4
ENE
7
1.4
ENE
7
1.6
ENE
7
0.7
E
12
0.7
E
12
2.1
ENE
7
1.9
ENE
7
2
ENE
7
1.8
ENE
7
2.1
ENE
7
2
ENE
7
2.1
ENE
8
1.8
NE
8
2.2
ENE
8
1.2
E
16
1.4
E
16
1.6
E
15
1.6
E
14
1.5
E
14
1.8
E
13
Wave Graph
Metric surfscale
Energy kJ
176
181
173
232
153
137
385
307
350
334
420
440
506
388
587
678
959
1190
1055
915
1144
Wind (km/h)
20
E
20
E
20
E
30
E
25
ENE
30
E
30
E
30
ENE
30
E
30
ENE
25
ENE
30
E
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
20
E
20
E
25
ENE
20
E
Wind State
cross
cross
cross
cross
cross-off
cross
cross
cross-off
cross
cross-off
cross-off
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross-off
cross
High Tide
10:47AM0.50m
4:27PM0.47m
11:49AM0.58m
12:26PM0.63m
12:57PM0.67m
1:25PM0.70m
10:19PM0.32m
1:53PM0.72m
11:31PM0.34m
2:20PM0.73m
00:17AM0.36m
Low Tide
2:42PM0.35m
2:12AM0.05m
3:06AM0.04m
4:02AM0.02m
4:52AM-0.00m
8:49PM0.24m
5:35AM-0.02m
8:33PM0.23m
6:14AM-0.04m
8:45PM0.23m
rain showers
rain showers
rain showers
rain showers
part cloud
clear
clear
clear
clear
rain showers
clear
part cloud
rain showers
clear
rain showers
part cloud
clear
rain showers
part cloud
rain showers
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:00
6:00
6:00
6:01
6:01
6:01
6:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:15
7:15
7:15
7:14
7:14
7:14
7:13
 mm
2
1
3
1
1
2
1
1
1
Temp °C
26
26
25
25
25
24
25
25
24
25
25
24
25
25
24
25
25
24
25
25
24
Feels °C
26
26
25
23
24
23
23
23
22
23
24
22
24
23
22
23
23
23
25
24
23
  • 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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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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