Surf Forecasts:
Goat Island/Mokuauia surf forecast from 12 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 11AM (local time) - 18ft (5.5m), 11s period, E swell with 6,793 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 5.5m 11s and forecast to arrive on Sunday (Aug 16) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 13s period and expected on Wednesday (Aug 12) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Sun 16th Aug) | 18ft (5.5m) 11s |
Table - best surf conditions forecast for Goat Island/Mokuauia over the next 16 days.
Short Range ForecastMostly dry. Warm (max 27°C on Thu afternoon, min 25°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 46mm), heaviest during Sat night. Warm (max 27°C on Sun afternoon, min 25°C on Fri night). Winds decreasing (near gales from the ENE on Sat night, moderate winds from the ESE by Sun night). | ||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | E 7 | E 7 | ENE 7 | E 6 | ENE 6 | ENE 6 | ENE 7 | ENE 8 | ENE 8 | E 11 | E 11 | E 11 | E 10 | E 11 | E 10 | E 8 | E 8 | ENE 8 | E 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 178 | 161 | 152 | 188 | 170 | 200 | 327 | 408 | 588 | 1549 | 2092 | 2116 | 1763 | 6793 | 2749 | 997 | 627 | 427 | 277 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | 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-on | cross-on | cross | cross | cross | cross-off |
High Tide | 1:11AM0.42m | 2:49PM0.82m | 2:04AM0.45m | 3:17PM0.78m | 2:56AM0.48m | 3:40PM0.72m | 3:50AM0.49m | 3:58PM0.65m | 4:48AM0.50m | 4:08PM0.59m | 5:55AM0.50m | 4:08PM0.53m | |||||||
Low Tide | 8:39PM0.20m | 7:20AM-0.08m | 9:04PM0.17m | 8:02AM-0.03m | 9:30PM0.14m | 8:43AM0.03m | 9:56PM0.12m | 9:23AM0.11m | 10:22PM0.09m | 10:04AM0.19m | 10:48PM0.08m | 10:48AM0.27m | 11:15PM0.07m | ||||||
 |  | |  | | | | | | |  | |  | | | | |  | | |
 | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | 7:05 | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — |
mm | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 28 | 8 | 4 | 1 | 1 | — | — |
Temp °C | 25 | 25 | 26 | 25 | 26 | 27 | 25 | 26 | 26 | 25 | 25 | 26 | 26 | 26 | 27 | 26 | 26 | 26 | 25 |
Feels °C | 25 | 24 | 25 | 24 | 25 | 25 | 24 | 24 | 24 | 23 | 23 | 24 | 21 | 23 | 26 | 27 | 26 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SSW 13 | SSW 12 | S 16 | S 15 | SSW 15 | ESE 10 | SSW 14 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | WNW 11 | WNW 11 |
| kJ | 35 | 32 | 31 | 30 | 45 | 41 | 72 | 85 | 40 | 12 | 13 | 12 | 15 | 28 | 28 | 25 | 24 | 24 | 12 |
Swell 2 Height (m) Direction Period (s) | NNW 7 | S 18 | S 18 | S 16 | SSW 12 | SSW 12 | NNW 7 | SSW 14 | NNW 8 | S 14 | W 11 | W 13 | WNW 13 | NNW 8 | NNW 8 | S 13 | S 14 | S 14 | S 14 |
| kJ | 5 | 25 | 55 | 46 | 27 | 28 | 5 | 41 | 6 | 33 | 22 | 30 | 33 | 13 | 6 | 13 | 16 | 16 | 15 |
Swell 3 Height (m) Direction Period (s) | W 10 | WNW 13 | WNW 12 | W 12 | NNW 8 | NNW 8 | W 11 | NNW 8 | W 12 | W 11 | S 13 | S 13 | S 13 | S 14 | S 16 | N 8 | SW 5 | SW 5 | WSW 5 |
| kJ | 8 | 16 | 14 | 11 | 6 | 6 | 10 | 6 | 11 | 9 | 31 | 14 | 14 | 14 | 20 | 5 | 1 | 4 | 3 |
Wind waves Height (m) Direction Period (s) | E 7 | E 7 | ENE 7 | E 6 | ENE 6 | ENE 6 | ENE 7 | ENE 8 | ENE 8 | E 11 | E 11 | E 11 | E 10 | E 11 | E 10 | E 8 | E 8 | ENE 8 | E 7 |
| kJ | 178 | 161 | 152 | 188 | 170 | 200 | 327 | 408 | 588 | 1549 | 2092 | 2116 | 1763 | 6793 | 2749 | 997 | 627 | 427 | 277 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 36 | 36 | 37 | 37 | 37 | 153 | 37 | 37 | 181 | 181 | 181 | 181 | 181 | 175 | 20 | 17 | 20 | 37 | 37 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Goat Island/Mokuauia surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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