Surf Forecasts:
Goat Island/Mokuauia surf forecast from 8 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 2AM (local time) - 5ft (1.5m), 10s period, ENE swell with glassy winds.
- Most powerful swell: Tuesday 8 Sep, 5AM (local time) - 7ft (2.2m), 12s period, ENE swell with 1,280 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 2AM (local time) - 5ft (1.5m), 10s period with ENE swell.
Best Forecast Surf Conditions for Goat Island/Mokuauia this week:
The surf forecast for Goat Island/Mokuauia over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 09) at 2AM. The primary swell is predicted to be 1.5m and 10s period with a secondary swell of 0.9m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Goat Island/Mokuauia in the next 16 days are 2.2m 12s and forecast to arrive on Tuesday (Sep 08) at 5AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 15s period and expected on Monday (Sep 07) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 9th Sep) | 5ft (1.5m) 10s |
| Best Surf | 2AM (Wed 9th Sep) | 5ft (1.5m) 10s |
| Most Powerful | 5AM (Tue 8th Sep) | 7ft (2.2m) 12s |
Table - best surf conditions forecast for Goat Island/Mokuauia over the next 16 days.
Short Range ForecastModerate rain (total 11mm), heaviest on Mon afternoon. Warm (max 29°C on Tue afternoon, min 25°C on Wed night). Winds decreasing (strong winds from the SE on Mon night, calm by Tue night). | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Thu afternoon, min 24°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | ||||||||||||||
PM | 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 8 | E 8 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | E 13 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | E 11 | ENE 8 | ENE 10 | E 10 | NNE 9 | NE 8 | NE 8 | NE 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1070 | 1008 | 959 | 787 | 427 | 194 | 168 | 214 | 303 | 286 | 186 | 121 | 286 | 212 | 160 | 192 | 94 | 72 | 72 | 84 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | on | cross-on | cross-on | glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross-off |
High Tide | 11:51PM0.40m | 1:12PM0.80m | 00:40AM0.47m | 1:38PM0.77m | 1:25AM0.52m | 2:01PM0.73m | 2:10AM0.57m | 2:20PM0.68m | 2:54AM0.60m | 2:35PM0.62m | 3:39AM0.62m | 2:47PM0.56m | 4:25AM0.62m | |||||||
Low Tide | 7:18PM0.20m | 5:43AM-0.02m | 7:30PM0.17m | 6:28AM-0.01m | 7:47PM0.14m | 7:10AM0.03m | 8:06PM0.10m | 7:51AM0.08m | 8:27PM0.07m | 8:32AM0.14m | 8:49PM0.05m | 9:13AM0.20m | 9:11PM0.03m | |||||||
 |  |  | |  |  |  |  | | | | | |  | | | | | | | |
 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — |
 | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — |
mm | 3 | 5 | — | — | — | — | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 28 | 29 | 27 | 27 | 27 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 25 |
Feels °C | 25 | 24 | 28 | 29 | 30 | 30 | 29 | 28 | 26 | 26 | 25 | 27 | 27 | 26 | 27 | 27 | 26 | 26 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 14 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | ENE 8 | NW 9 | E 12 | E 12 | E 12 | E 11 | NNE 8 | SW 15 | ENE 10 | NE 9 | NNE 9 | NE 8 | NE 8 | NE 8 |
| kJ | 869 | 5020 | 959 | 787 | 427 | 194 | 165 | 125 | 104 | 103 | 96 | 121 | 54 | 109 | 160 | 77 | 94 | 72 | 72 | 84 |
Swell 2 Height (m) Direction Period (s) | NW 13 | E 8 | SE 7 | W 10 | NW 8 | NW 8 | NW 8 | E 13 | NW 7 | NW 8 | SW 16 | SSW 16 | SW 15 | SW 9 | NE 8 | SW 13 | ENE 9 | ENE 9 | ENE 9 | SSW 12 |
| kJ | 28 | 1008 | 22 | 417 | 120 | 153 | 78 | 161 | 26 | 22 | 67 | 100 | 57 | 12 | 72 | 45 | 48 | 46 | 31 | 15 |
Swell 3 Height (m) Direction Period (s) | NW 13 | NW 12 | SSW 15 | E 14 | W 6 | E 13 | E 13 | SSW 13 | NW 10 | SW 18 | SW 10 | NW 9 | SW 9 | NW 9 | SW 14 | SW 16 | SW 13 | SW 12 | SSW 15 | WNW 12 |
| kJ | 28 | 37 | 86 | 97 | 40 | 168 | 168 | 16 | 25 | 80 | 16 | 12 | 13 | 13 | 102 | 39 | 44 | 24 | 21 | 14 |
Wind waves Height (m) Direction Period (s) | E 8 | SSE 7 | WSW 10 | SW 8 | — | — | E 3 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | E 11 | ENE 8 | — | E 10 | E 5 | E 5 | E 5 | ENE 9 |
| kJ | 1070 | 720 | 1058 | 162 | — | — | 2 | 214 | 303 | 286 | 186 | 115 | 286 | 212 | — | 192 | 35 | 37 | 19 | 62 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 149 | 152 | 166 | 2 | 0 | 8 | 15 | 15 | 15 | 36 | 36 | 17 | 13 | 15 | 12 | 13 | 13 | 15 | 15 | 15 |
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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