Surf Forecasts:
Rockpiles surf forecast from 23 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 3.5ft (1.1m), 17s period, S swell with 716 kJ wave energy.
Best Forecast Surf Conditions for Rockpiles this week:
The most powerful waves expected at Rockpiles in the next 16 days are 1.1m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Thursday (Aug 27) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Thu 27th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Alright, grab a coffee and listen up. This is Rusty, and I’m looking at the next few weeks at Rockpiles. It’s a bit of a mixed bag, but we’ve got a serious light at the end of the tunnel. Let’s get into it.
The immediate outlook is grim, I gotta be honest. We’re starting Sunday the 23rd and running straight through to the end of the month with hardly anything worth paddling out for. The swell is coming from the ENE, but it’s short period, around 7 seconds, and it’s being hammered by a stiff cross-offshore breeze at 25 mph. The wave energy is weak to moderate (around 608), and the water is a warm 81°, which is about average for this time of year. The comment says it all: poor surf conditions. It’s a rough stretch.
We’ll see a tiny shift late on Wednesday the 26th and into Thursday the 27th. A long-period S'ly swell (17 seconds) shows up, but it’s small, only 2 ft to 4 ft. The energy is moderate (855), and the wind is still a cross-off, so it’s clean. But the data calls it "marginal," and I have to agree. Long-period swells like this can be a bit tricky at a reef break, but the size is just too small to get excited about.
The real story, the one that’s got me watching the calendar, is the first week of September. Things start to cook on Tuesday the 1st. We’ve got a solid 7 ft ENE swell pushing in, with moderate energy (1274). The wind is lighter, but shifting cross-on, so it’s a bit choppy. Still, it’s a step up.
Then, hold onto your board. From Thursday the 3rd through to Monday the 7th of September, Rockpiles is looking like the only show in town. We’re talking a solid 7 ft to 8 ft ENE swell, with a period that builds from 8 seconds up to a very long 12-14 seconds. The wave energy is strong to very strong, hitting 2630 and even 2913. Now, this is expert territory. At 8 ft, it’s not for beginners, and with that long period, the sets will be powerful and clean.
The absolute standout morning is Monday the 7th of September. The forecast has a 10 ft ENE swell, a 12-second period, and the wind is a glassy light NNW breeze. The report says "excellent surf conditions for experienced surfers," and I’m all in on that. That’s a big, clean, powerful swell at a reef break. It’s a long way out, so keep an eye on the charts, but this is the one to point your car towards.
The rest of the second week sees consistent ENE swell, but the wind sticks around as a cross-off, keeping it clean but not as perfect as that Monday morning.
So, to sum it up: the next week is a write-off. The first day of September is a tease, but the real money is on the 7th. That Monday morning is the clear standout. Get your big board ready.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Sun afternoon, min 25°C on Tue night). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Wed morning, min 25°C on Wed morning). Mainly fresh winds. | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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 | ENE 7 | ENE 7 | E 7 | E 7 | ENE 7 | ENE 7 | E 7 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | ENE 7 | ENE 6 | ENE 7 |
Wave Graph | |||||||||||||||||||||
326 | 317 | 316 | 261 | 269 | 255 | 366 | 319 | 285 | 255 | 307 | 351 | 716 | 427 | 482 | 260 | 329 | 225 | 239 | 210 | 276 | |
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 | 1:52PM0.66m | 1:46AM0.26m | 2:26PM0.67m | 2:21AM0.29m | 2:56PM0.68m | 2:55AM0.33m | 3:24PM0.68m | 3:31AM0.37m | 3:53PM0.66m | 4:08AM0.41m | 4:20PM0.62m | 4:47AM0.46m | 4:49PM0.57m | ||||||||
Low Tide | 9:18PM0.14m | 6:59AM0.08m | 9:35PM0.13m | 7:43AM0.06m | 9:53PM0.11m | 8:24AM0.05m | 10:12PM0.10m | 9:05AM0.06m | 10:32PM0.08m | 9:46AM0.07m | 10:54PM0.07m | 10:31AM0.10m | 11:17PM0.05m | ||||||||
6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | |
— | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 26 | 27 | 27 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 25 | 24 | 24 | 25 | 26 | 26 | 24 | 23 | 22 | 23 | 24 | 23 | 24 | 23 | 22 | 24 | 23 | 23 | 23 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SSW 15 | SW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 16 | SSW 15 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | E 12 | E 13 | E 13 |
116 | 191 | 100 | 166 | 156 | 127 | 85 | 142 | 121 | 215 | 307 | 351 | 716 | 427 | 482 | 260 | 329 | 225 | 112 | 125 | 121 | |
Swell 2 Height (m) Direction Period (s) | S 13 | SSE 11 | SSE 13 | SSE 12 | SSE 8 | SSE 7 | SSW 16 | SSW 12 | SSW 12 | S 18 | SSW 13 | SSW 13 | NNE 8 | SSW 12 | NNE 8 | SSW 11 | E 14 | E 13 | S 13 | S 12 | S 12 |
90 | 25 | 56 | 50 | 23 | 19 | 146 | 81 | 81 | 165 | 135 | 137 | 7 | 46 | 11 | 22 | 62 | 84 | 85 | 76 | 102 | |
Swell 3 Height (m) Direction Period (s) | SSW 15 | WNW 10 | SSW 15 | SSW 18 | SSE 12 | SSW 17 | SSE 12 | SSE 10 | SSW 18 | SSE 12 | W 10 | SSW 16 | WNW 10 | W 9 | W 9 | NNE 7 | SSW 19 | SW 19 | S 13 | S 13 | SSW 17 |
76 | 19 | 71 | 62 | 47 | 94 | 47 | 42 | 109 | 14 | 8 | 50 | 9 | 7 | 7 | 10 | 36 | 56 | 89 | 89 | 188 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | E 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | E 6 | ENE 6 | ENE 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 6 | ENE 7 |
326 | 317 | 316 | 261 | 269 | 255 | 366 | 319 | 285 | 255 | 239 | 206 | 139 | 132 | 139 | 127 | 165 | 201 | 239 | 210 | 276 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 38 | 46 | 38 | 38 | 30 | 31 | 38 | 38 | 31 | 38 | 33 | 30 | 30 | 44 | 1 | 30 | 44 | 30 | 31 | 38 | 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.











