
Surf Forecasts:
Rockpiles surf forecast from 8 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 2AM (local time) - 4.5ft (1.4m), 10s period, ENE swell with glassy winds.
- Most powerful swell: Tuesday 8 Sep, 5AM (local time) - 15ft (4.5m), 12s period, SW swell with 5,915 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 2AM (local time) - 4.5ft (1.4m), 10s period with ENE 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 2AM. The primary swell is predicted to be 1.4m and 10s period with a secondary swell of 1.0m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Rockpiles in the next 16 days are 4.5m 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 1.7m 10s period and expected on Tuesday (Sep 08) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 9th Sep) | 4.5ft (1.4m) 10s |
| Best Surf | 2AM (Wed 9th Sep) | 4.5ft (1.4m) 10s |
| Most Powerful | 5AM (Tue 8th Sep) | 15ft (4.5m) 12s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get stuck into this 16-day outlook for Rockpiles. It’s a reef setup, dead exposed to the swell, and it’s gonna be a bit of a waiting game for the good stuff.
The ocean’s been a bit of a mess, but the real story starts to unfold on Wednesday the 9th. We’ve got a clean little window of surf that’s worth paddling out for. The days before that, Tuesday the 8th, are a total write-off with rain showers and a strong onshore wind hitting 19 mph, pushing a messy 8 ft swell around. Not worth your time.
The standout morning is Wednesday the 9th. The wind swings light from the ENE at 6 mph, giving us a clean, cross-off breeze. The swell is a tidy 3 ft from the SSW with a long period of 14 seconds. That’s proper groundswell, and for a reef like Rockpiles, that’s going to line up nicely. The water is a balmy 81°F, which is bang on average for this time of year, so no wetsuit needed. The combined swell energy is moderate at 521, but the quality is what counts. This is your best bet for the whole run.
The pattern holds through Wednesday afternoon and into Thursday morning, but on Thursday the 10th, the swell jumps to 5 ft but with a short, weak period of 7 seconds from the ENE. That’s choppy, wind-affected slop, even with clean conditions. The scores are low, and it’s a miss.
Friday the 11th has a similar story: 4 ft to 4 ft of short-period ENE swell around 11 seconds. The wind stays cross-off, but the energy is just a bit weak (779 peak). It’s surfable, but it’s not the promise of Wednesday.
The rest of the first week and into the second week, from Saturday the 12th through to early the following week, the swell drops off a cliff. Swell heights hover around 1 ft to 2 ft. The period is decent enough (up to 22 seconds on Monday the 14th), but there’s just no size to push the waves. The combined energy dips from 438 down to 106. It’s flat and clean, but not worth the drive.
The second week gets a little more interesting around Wednesday the 16th of September. The swell picks up a touch to 3 ft from the SW with a very long period of 18 seconds. The wind is light from the ENE at 9 mph, and the water is still warm. The energy is moderate at 536. This is the second-best call of the outlook, but it’s a long way out. The long period means it’ll be fat and wally at the beach breaks, but Rockpiles being a reef, it should handle it.
After that, from Thursday the 17th, the wind starts to howl again, hitting 19 to 22 mph from the ENE. The swell mixes up with some short-period ENE junk (5 ft at 8 seconds) and some longer period SSW groundswell, but that strong wind will mess with the surface.
Honestly, if you’re free, make the call for Wednesday the 9th. That’s the day. The rest of the month is a case of watching the charts and hoping the wind settles.
Rusty, out.
Short Range ForecastLight rain (total 5mm), mostly falling on Tue morning. Warm (max 28°C on Tue afternoon, min 25°C on Thu night). Winds decreasing (fresh winds from the SSW on Tue morning, calm by Tue night). | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Sun afternoon, min 25°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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) | SSW 10 | ENE 11 | ENE 10 | SSW 14 | SSW 13 | ENE 7 | ENE 7 | ENE 7 | SW 16 | ENE 11 | ENE 11 | SW 15 | SW 15 | ENE 10 | SSW 13 | SW 15 | SSW 15 | ENE 8 | SSW 14 | SW 22 | SW 21 |
Wave Graph | |||||||||||||||||||||
1042 | 650 | 378 | 269 | 257 | 177 | 236 | 229 | 268 | 387 | 297 | 226 | 242 | 166 | 68 | 107 | 84 | 149 | 76 | 227 | 224 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | 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 |
High Tide | 2:28PM0.72m | 2:51AM0.39m | 3:05PM0.69m | 3:32AM0.45m | 3:39PM0.64m | 4:11AM0.50m | 4:12PM0.57m | 4:51AM0.54m | 4:42PM0.50m | 5:31AM0.57m | 5:11PM0.43m | 6:14AM0.58m | 5:40PM0.36m | ||||||||
Low Tide | 9:22PM0.06m | 8:21AM0.06m | 9:46PM0.05m | 9:12AM0.07m | 10:10PM0.04m | 10:02AM0.10m | 10:33PM0.04m | 10:52AM0.13m | 10:56PM0.05m | 11:45AM0.17m | 11:19PM0.06m | 12:45PM0.20m | 11:42PM0.08m | ||||||||
6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | |
— | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | |
mm | 2 | — | — | — | — | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 28 | 27 | 28 | 28 | 27 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 27 | 26 | 27 | 27 | 26 |
Feels °C | 26 | 29 | 30 | 31 | 30 | 30 | 26 | 25 | 24 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 28 | 28 | 28 | 27 | 25 |
Swell 1 Height (m) Direction Period (s) | ENE 11 | SSW 8 | ENE 10 | ENE 9 | ENE 8 | ENE 7 | E 12 | SSW 12 | SW 16 | ENE 11 | ENE 11 | ENE 10 | E 10 | ENE 10 | NE 9 | ENE 6 | NE 8 | NE 8 | NE 8 | E 8 | E 8 |
785 | 466 | 378 | 194 | 140 | 177 | 141 | 121 | 268 | 387 | 297 | 222 | 196 | 166 | 75 | 59 | 72 | 57 | 57 | 40 | 71 | |
Swell 2 Height (m) Direction Period (s) | W 10 | ENE 11 | SSW 8 | SSW 14 | SSW 13 | E 13 | SSW 13 | E 12 | E 11 | SW 16 | SW 15 | SW 15 | SW 15 | NE 8 | ENE 9 | NE 8 | SSW 15 | SW 14 | E 8 | SW 22 | NE 8 |
539 | 650 | 137 | 269 | 257 | 156 | 131 | 101 | 93 | 261 | 229 | 226 | 242 | 74 | 46 | 72 | 84 | 100 | 30 | 227 | 67 | |
Swell 3 Height (m) Direction Period (s) | SSW 15 | W 8 | SSW 14 | SSW 8 | E 13 | SSW 13 | SSW 16 | SW 18 | S 12 | SSW 11 | NNE 8 | NNE 7 | NNE 8 | SSW 16 | SSW 13 | SW 15 | SW 12 | SW 24 | SSW 14 | SW 14 | SW 21 |
474 | 130 | 356 | 58 | 166 | 176 | 181 | 154 | 67 | 43 | 32 | 30 | 47 | 99 | 68 | 107 | 23 | 87 | 76 | 49 | 224 | |
Wind waves Height (m) Direction Period (s) | SSW 10 | — | — | — | — | — | ENE 7 | ENE 7 | ENE 7 | ENE 7 | — | — | — | — | ENE 5 | — | ENE 6 | ENE 8 | NE 5 | NE 8 | — |
1042 | — | — | — | — | — | 236 | 229 | 158 | 88 | — | — | — | — | 30 | — | 68 | 149 | 41 | 129 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 114 | 16 | 0 | 0 | 0 | 0 | 30 | 1 | 1 | 1 | 1 | 1 | 30 | 1 | 30 | 30 | 1 | 0 | 1 | 1 | 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.










