Surf Forecasts:
Rockpiles surf forecast from 29 Aug 2026:
- Most powerful swell: Friday 4 Sep, 2PM (local time) - 7ft (2.1m), 11s period, ENE swell with 1,083 kJ wave energy.
Best Forecast Surf Conditions for Rockpiles this week:
The most powerful waves expected at Rockpiles in the next 16 days are 2.1m 11s and forecast to arrive on Friday (Sep 04) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Friday (Aug 28) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Fri 4th Sep) | 7ft (2.1m) 11s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Right, Rusty here for a look at what’s cooking.
Water temp is sitting at about 81°, which is pretty normal for this time of year. Now, the first few days are a bit of a bust. We get some swell but it’s all wind-affected with that constant cross-off breeze. Things start to get interesting around the 31st as the swell hits 6-7ft, but the wind is still a problem. The real window to watch kicks off around the 4th of September. We get a solid 7ft swell from the ENE with a 12-second period, bringing some real power. The energy numbers are solid, well above 1000 (1230) on the morning of the 4th. That’s groundswell, and for a reef like Rockpiles, that long period means the waves will wrap in nicely and have some good shape. The following Saturday the 5th has similar size at 7ft from the ENE, so it’s a clean run with that cross-off wind keeping the surface smooth. This is the pick of the bunch – but at over 6ft, it’s for the experienced crew.
The week of the 7th sees things get heavy. Swell hits 10ft plus on the 7th and 8th, and the energy numbers are monstrous, hitting over 2500. That is expert-only, and with a strong breeze, it will be rough.
The forecast goes to pieces on the 10th of September. A severe gale with heavy rain at 50 mph will trash the place. The 11th and 12th drop right off to tiny 2ft slop with no energy. Not worth paddling out for.
The best we’ve got in this run is the 4th and 5th of September. Good size, good period, and clean. Rockpiles is the spot.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Fri morning, min 25°C on Fri morning). Mainly fresh winds. | Days 4-6 Weather SummarySome drizzle, heaviest during Tue morning. Warm (max 27°C on Tue afternoon, min 25°C on Mon morning). Mainly fresh winds. | ||||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | |||||||||||||||
AM | 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) | S 14 | S 14 | S 13 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 16 | S 16 | ENE 8 | ENE 8 | ENE 8 | E 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 260 | 329 | 229 | 177 | 207 | 419 | 371 | 316 | 371 | 420 | 439 | 545 | 627 | 488 | 412 | 422 | 334 | 318 | 370 | 348 | 714 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | 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-off |
High Tide | 4:20PM0.62m | 4:47AM0.46m | 4:49PM0.57m | 5:30AM0.50m | 5:18PM0.51m | 6:18AM0.53m | 5:48PM0.44m | 7:14AM0.56m | 6:20PM0.36m | 8:21AM0.59m | 6:54PM0.28m | 9:39AM0.62m | 7:57PM0.22m | ||||||||
Low Tide | 9:46AM0.07m | 10:54PM0.07m | 10:31AM0.10m | 11:17PM0.05m | 11:22AM0.14m | 11:42PM0.05m | 12:22PM0.19m | 00:10AM0.05m | 1:40PM0.23m | 00:43AM0.05m | 3:38PM0.25m | 1:25AM0.06m | 6:22PM0.22m | 2:24AM0.08m | |||||||
 | |  |  | | | | |  | | | |  | | | | | | | | | |
 | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — |
 | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 27 | 26 | 26 | 27 | 26 | 26 | 26 | 25 |
Feels °C | 23 | 24 | 22 | 23 | 22 | 22 | 23 | 22 | 22 | 23 | 23 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 23 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 14 | S 13 | E 13 | E 12 | S 12 | SSW 16 | S 12 | SSW 15 | SSW 15 | SSW 14 | S 19 | SSW 18 | S 18 | S 17 | ENE 8 | S 16 | E 9 | S 14 | S 14 | E 12 |
| kJ | 260 | 329 | 229 | 126 | 110 | 102 | 171 | 100 | 199 | 144 | 138 | 192 | 329 | 314 | 280 | 315 | 322 | 133 | 206 | 195 | 714 |
Swell 2 Height (m) Direction Period (s) | E 16 | E 15 | E 14 | S 13 | S 13 | E 12 | SSW 12 | SSW 16 | S 11 | S 11 | S 11 | S 10 | SW 14 | S 12 | S 13 | S 16 | SSE 11 | S 15 | E 13 | E 13 | S 13 |
| kJ | 78 | 109 | 146 | 85 | 89 | 106 | 46 | 162 | 59 | 59 | 55 | 32 | 50 | 49 | 52 | 422 | 38 | 279 | 121 | 153 | 176 |
Swell 3 Height (m) Direction Period (s) | SSW 11 | SSW 19 | SW 19 | S 13 | S 12 | SSW 17 | SSE 12 | W 11 | S 20 | S 21 | SSW 19 | SSW 14 | S 10 | SW 14 | SW 14 | SW 14 | E 15 | E 14 | SSE 10 | SSE 10 | ESE 13 |
| kJ | 22 | 36 | 56 | 89 | 75 | 186 | 48 | 9 | 30 | 34 | 122 | 79 | 30 | 51 | 51 | 30 | 38 | 91 | 20 | 34 | 17 |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NNE 6 |
| kJ | 146 | 123 | 188 | 177 | 207 | 419 | 371 | 316 | 371 | 420 | 439 | 545 | 627 | 488 | 412 | 232 | 334 | 318 | 370 | 348 | 45 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 31 | 127 | 31 | 31 | 127 | 38 | 38 | 47 | 31 | 38 | 41 | 30 | 32 | 41 | 30 | 30 | 39 | 31 | 30 | 127 | 30 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Rockpiles Surf forecast
The above surf forecast table for Rockpiles provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Rockpiles can be found by selecting the local surf guide option on the grey menu. Our Rockpiles 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 (Rockpiles) 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 Rockpiles 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.
Rockpiles is 4 km (2 miles) from Honolulu. If you plan a vacation in Oahu, look for hotels and other accommodation in Honolulu. Honolulu has rooms for a wide range of budgets as well as car hire and transport links.
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