Surf Forecasts:
Rockpiles surf forecast from 5 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 5AM (local time) - 3ft (0.9m), 14s period, SSW swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 11PM (local time) - 10ft (3.0m), 14s period, SW swell with 3,827 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 5AM (local time) - 3ft (0.9m), 14s period with SSW swell.
Best Forecast Surf Conditions for Rockpiles this week:
The surf forecast for Rockpiles over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 09) at 5AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 1.2m and 9s. Another secondary swell of 0.9m and 8s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Rockpiles in the next 16 days are 3.0m 14s and forecast to arrive on Monday (Sep 07) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 11s period and expected on Tuesday (Sep 08) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 9th Sep) | 3ft (0.9m) 14s |
| Best Surf | 5AM (Wed 9th Sep) | 3ft (0.9m) 14s |
| Most Powerful | 11PM (Mon 7th Sep) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on offer for Rockpiles over the next couple of weeks. I’ll be straight with you – this is a tricky one. The opening days are looking pretty average, and the wind is the main problem. We’ve got a fresh breeze howling from the ENE, making it cross-off mostly, but the waves are just not lining up cleanly. The swell is running around 7 ft with a period of 13 seconds from the ENE, and the combined energy is strong at 2388. The water temperature is about average for this time of year. But the surf quality is marginal, and the tide’s not helping. The best you can hope for on Saturday the 5th is a messy, choppy session. The wind stays onshore Sunday and the swell drops a touch, but the energy is still there – 2062. It’s not great, but if you’re desperate, you could get a few.
Monday the 7th sees a new swell from the SW, hitting 8 ft by the afternoon with a 14-second period and a massive combined energy of 4507. But the wind shifts to a cross-onshore and the conditions become choppy. The reef is exposed, but with that wind and a cross-chop, it’s going to be a washing machine. This is more of a kite-surfing setup than a paddle session. For the rest of the week, the wind stays strong from the ENE, and the swell is on the smaller side, under 3 ft. The energy drops off significantly, with values around 500-800. It’s clean but weak. Not really worth paddling out for.
The real standout, the one that catches my eye, shows up on Tuesday the 15th. We get a long-period groundswell from the SW, 21 seconds, with a combined energy of 709. The swell height is only 2 ft, but the period is very long, so those waves will have a lot of push and be lined up beautifully. The wind is cross-off from the ENE, so the face will be glassy. The best part of the forecast is the clarity and the clean conditions. This is a proper reef break, and groundswell like this with a very long period works perfectly here. It’s not a big wave, but it will be clean and well-shaped. This is the one to keep an eye on. The wind stays moderate, and the water is calm. If you can get out on Tuesday morning, you’ll be rewarded.
From Wednesday the 16th, the swell hangs around, but the wind picks up to a strong breeze by the 18th, and the conditions go to poor. The energy is still there, but it’s just not surfable with that wind. The second week looks like a write-off with strong winds and poor surf conditions. If you’re in the area, mark Tuesday the 15th on your calendar.
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Sun night. Warm (max 27°C on Sat afternoon, min 25°C on Fri night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Mon night. Warm (max 27°C on Mon night, min 25°C on Wed night). Winds increasing (light winds from the E on Tue night, strong winds from the ENE by Wed night). | ||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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) | ENE 14 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | ENE 12 | SW 14 | SW 14 | SW 13 | SW 11 | ENE 11 | SSW 14 | SSW 14 | SSW 13 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 1842 | 1679 | 1654 | 1568 | 1240 | 1108 | 1360 | 1418 | 2350 | 3160 | 1340 | 560 | 356 | 273 | 204 | 242 | 261 | 273 | 297 |
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 | cross-on | cross-on | on | on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 10:35PM0.19m | 12:05PM0.69m | 00:18AM0.21m | 1:00PM0.73m | 1:21AM0.26m | 1:47PM0.73m | 2:09AM0.32m | 2:28PM0.72m | 2:51AM0.39m | 3:05PM0.69m | 3:32AM0.45m | 3:39PM0.64m | 4:11AM0.50m | ||||||
Low Tide | 3:46AM0.09m | 8:03PM0.13m | 5:11AM0.08m | 8:31PM0.10m | 6:25AM0.07m | 8:57PM0.08m | 7:26AM0.06m | 9:22PM0.06m | 8:21AM0.06m | 9:46PM0.05m | 9:12AM0.07m | 10:10PM0.04m | |||||||
 |  | |  |  |  |  | | |  | | |  | | | | | | | |
 | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 6:44 | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — |
mm | — | — | — | — | — | 3 | 7 | 3 | 2 | 1 | — | — | 1 | — | — | 1 | — | — | — |
Temp °C | 26 | 26 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 |
Feels °C | 24 | 24 | 25 | 25 | 26 | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 31 | 26 | 26 | 24 | 23 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 12 | S 12 | ENE 13 | SSW 12 | ENE 12 | ENE 12 | SW 14 | SW 14 | SW 13 | SW 11 | ENE 11 | ENE 9 | ENE 8 | ENE 8 | SSW 13 | E 12 | SSW 12 | E 13 |
| kJ | 504 | 647 | 650 | 1568 | 548 | 1108 | 1360 | 1418 | 2350 | 3160 | 1340 | 560 | 272 | 197 | 153 | 176 | 139 | 123 | 215 |
Swell 2 Height (m) Direction Period (s) | N 11 | SSW 18 | NNE 10 | SSW 12 | SW 16 | SSW 12 | SSW 14 | E 13 | ENE 12 | ENE 12 | ENE 11 | SSW 9 | SSW 8 | SSW 14 | SSW 13 | E 12 | SSW 13 | SW 18 | SW 16 |
| kJ | 10 | 62 | 19 | 614 | 255 | 429 | 1080 | 972 | 1568 | 1102 | 724 | 297 | 158 | 273 | 204 | 148 | 133 | 154 | 211 |
Swell 3 Height (m) Direction Period (s) | SSW 20 | NNE 10 | NNE 10 | SSE 10 | SSE 10 | SW 14 | SSW 18 | SSW 17 | SSW 17 | SSW 15 | SSW 15 | W 10 | SSW 14 | SSW 8 | E 13 | S 7 | SW 16 | E 12 | SSW 12 |
| kJ | 38 | 20 | 19 | 19 | 19 | 412 | 260 | 492 | 589 | 481 | 474 | 338 | 356 | 64 | 163 | 26 | 133 | 70 | 47 |
Wind waves Height (m) Direction Period (s) | ENE 14 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | — | — | ENE 7 | — | — | SSW 9 | — | — | ENE 8 | — | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
| kJ | 1842 | 1679 | 1654 | 816 | 1240 | — | — | 195 | — | — | 552 | — | — | 270 | — | 242 | 261 | 273 | 297 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1 | 30 | 31 | 1 | 30 | 30 | 1 | 41 | 58 | 45 | 20 | 20 | 1 | 30 | 30 | 30 | 31 | 127 | 1 |
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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