
Surf Forecasts:
Rockpiles surf forecast from 4 Sep 2026:
- Best quality surf: Monday 7 Sep, 5PM (local time) - 18ft (5.5m), 15s period, SSW swell with cross-onshore winds.
- Most powerful swell: Monday 7 Sep, 5PM (local time) - 18ft (5.5m), 15s period, SSW swell with 13,325 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 5PM (local time) - 18ft (5.5m), 15s 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 Monday (Sep 07) at 5PM. The primary swell is predicted to be 5.5m and 15s period with a secondary swell of 2.4m and 12s. Another secondary swell of 1.9m and 12s is also forecast. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Rockpiles in the next 16 days are 5.5m 15s and forecast to arrive on Monday (Sep 07) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 10s period and expected on Tuesday (Sep 08) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Mon 7th Sep) | 18ft (5.5m) 15s |
| Best Surf | 5PM (Mon 7th Sep) | 18ft (5.5m) 15s |
| Most Powerful | 5PM (Mon 7th Sep) | 18ft (5.5m) 15s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Alright, surfers, Rusty here. Let’s look at what we’ve got coming up for Rockpiles. It’s a bit of a mixed bag this fortnight, with plenty of wind to work around, but there are a couple of windows that could be worth a look.
The water right now is sitting at 81°, which is bang on average for this time of year, so no surprises there.
We start off rough. The first few days are a write-off for decent surfing. Thursday the 3rd and Friday the 4th are blown out by strong ENE winds around 25 mph, making for poor, messy conditions. There’s some swell, with 7 ft on offer, but the period is short and the wind is just too strong. The combined energy is moderate (977) but it’s not doing us any favours.
Saturday the 5th and Sunday the 6th see the wind drop a touch to a moderate breeze, but it’s still cross-off and the swell is mixed. The swell is around 7 ft to 8 ft with a much better period of 12 to 13 seconds, showing strong wave energy (2609). The surface stays clean, but the forecast is described as marginal, so it’s not a standout.
Now, Monday the 7th is a real Jekyll and Hyde. The morning looks promising with a solid 10 ft SSW swell and a very long period of 15 seconds, packing a massive punch of energy (6186). The wind is cross-off, which is a major positive. This is the kind of groundswell that will make the reef work, but with that size, it’s for experts only. The afternoon though, it all turns to rubbish. The wind swings onshore and cranks up to 25 mph, making it a total mess. So, the window is small.
The middle of the week from Tuesday the 8th to Thursday the 10th is a frustrating drop-off. The swell disappears, dropping to 3 ft to 3 ft, and the wind is still a fresh breeze from the ENE. It’s clean, but there’s just not enough energy in the water to hold you up.
We pick up again on Friday the 11th through to Monday the 14th. The swell returns to a solid 6 ft to 8 ft from the ENE, with periods around 8 to 13 seconds. The wind is a moderate cross-off, keeping things clean. The wave energy is strong, hitting 1483. This is a long run of clean, rideable surf, but it’s not a single standout event. It’s more of a good, consistent stretch of surf.
The standout call: Tuesday the 15th. This is the one to circle. The swell drops to 3 ft, but it’s a super-long period SSW groundswell of 20 to 21 seconds. The combined energy is still strong (1448). The wind is a light breeze from the ENE, making it glassy. The forecast says *excellent surf conditions for experienced surfers*. That long period groundswell will wrap around the reef perfectly, giving you clean, long lines. For a reef break, this is as good as it gets. Because of the quality, it’s worth mentioning that crowds are possible here.
The final few days of the forecast, from the 16th to the 18th, are a fading swell. The 18th of September has a brief uptick with 6 ft ENE swell and a gentle cross-off breeze, which is a nice way to finish the period.
So, hold out for Tuesday the 15th. That’s the real gem. The week before the 11th has some consistent waves, but the 15th is the true quality window.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Thu morning, min 25°C on Thu morning). Mainly strong winds. | Days 4-6 Weather SummaryHeavy rain (total 22mm), heaviest during Sun night. Warm (max 28°C on Tue afternoon, min 24°C on Sun night). Winds decreasing (strong winds from the SSE on Mon night, calm by Tue night). | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
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) | ENE 7 | ENE 7 | ENE 7 | S 12 | E 14 | E 14 | ENE 13 | ENE 14 | ENE 13 | ENE 12 | ENE 12 | SSW 14 | SSW 15 | SSW 15 | S 10 | ENE 10 | ENE 10 | SSW 14 | SSW 14 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||||
526 | 456 | 456 | 504 | 577 | 890 | 1792 | 1715 | 1777 | 1543 | 1493 | 1606 | 3866 | 13325 | 1537 | 492 | 371 | 289 | 273 | 237 | 468 | |
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 | cross-on | on | on | on | glassy | cross-off | cross-off | cross-off |
High Tide | 9:39AM0.62m | 7:57PM0.22m | 10:58AM0.66m | 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 | |||||||
Low Tide | 6:22PM0.22m | 2:24AM0.08m | 7:30PM0.17m | 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 | ||||||||
6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | 6:45 | — | — | 6:44 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 2 | 6 | 1 | — | 10 | 2 | 1 | — | 1 | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 27 | 26 |
Feels °C | 22 | 22 | 21 | 22 | 22 | 22 | 24 | 24 | 25 | 25 | 26 | 26 | 27 | 26 | 23 | 27 | 31 | 31 | 30 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | S 15 | SSE 12 | S 13 | S 12 | S 12 | E 14 | S 12 | S 12 | SSW 12 | SSW 12 | SSW 13 | SSW 14 | SSW 15 | ENE 12 | WSW 10 | S 9 | ENE 10 | ENE 8 | SSW 14 | SSW 13 | E 13 |
209 | 184 | 339 | 504 | 480 | 890 | 472 | 555 | 781 | 920 | 1326 | 1606 | 3866 | 1771 | 1351 | 402 | 319 | 207 | 273 | 204 | 168 | |
Swell 2 Height (m) Direction Period (s) | E 13 | S 14 | E 14 | E 14 | E 14 | S 11 | SSW 17 | SSW 17 | N 11 | SSE 10 | SSE 11 | S 18 | SSW 17 | ENE 12 | ENE 12 | ENE 10 | SSW 8 | SSW 8 | E 13 | E 13 | SSW 13 |
162 | 200 | 334 | 357 | 577 | 361 | 115 | 119 | 9 | 19 | 22 | 240 | 394 | 1106 | 1268 | 492 | 217 | 119 | 222 | 171 | 135 | |
Swell 3 Height (m) Direction Period (s) | SSE 12 | E 12 | SW 18 | SW 18 | SW 13 | NNE 11 | NNE 10 | NNE 10 | SSE 10 | SSW 20 | N 10 | S 10 | NW 15 | — | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 8 | SSW 8 | SSW 8 |
94 | 145 | 12 | 12 | 27 | 12 | 20 | 19 | 21 | 76 | 8 | 51 | 8 | — | 481 | 397 | 371 | 289 | 62 | 45 | 19 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 13 | ENE 14 | ENE 13 | ENE 12 | ENE 12 | ENE 12 | ENE 13 | SSW 15 | S 10 | — | — | — | ENE 8 | ENE 7 | ENE 7 |
526 | 456 | 456 | 484 | 456 | 303 | 1792 | 1715 | 1777 | 1543 | 1493 | 1564 | 1935 | 13325 | 1537 | — | — | — | 237 | 237 | 468 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 45 | 44 | 39 | 44 | 44 | 31 | 31 | 38 | 30 | 31 | 30 | 30 | 127 | 126 | 143 | 20 | 16 | 0 | 2 | 30 | 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.










