
Surf Forecasts:
Rockpiles surf forecast from 11 Aug 2026:
- Best quality surf: Sunday 16 Aug, 8AM (local time) - 23ft (7.0m), 14s period, ENE swell with onshore winds.
- Most powerful swell: Sunday 16 Aug, 11AM (local time) - 23ft (7.0m), 13s period, ENE swell with 18,206 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 8AM (local time) - 23ft (7.0m), 14s 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 Sunday (Aug 16) at 8AM. The primary swell is predicted to be 7.0m and 14s period with a secondary swell of 0.8m and 17s. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Rockpiles in the next 16 days are 7.0m 13s and forecast to arrive on Sunday (Aug 16) at 11AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 7s period and expected on Saturday (Aug 15) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sun 16th Aug) | 23ft (7.0m) 14s |
| Best Surf | 8AM (Sun 16th Aug) | 23ft (7.0m) 14s |
| Most Powerful | 11AM (Sun 16th Aug) | 23ft (7.0m) 13s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Alright, let’s talk about Rockpiles.
Honestly, things are looking pretty quiet for a while. There’s a bit of swell in the water starting Monday afternoon (August 10th), but it’s a small, long-period SSW groundswell pushing only 2ft. The water temp is sitting at a warm 81°, which is about normal for this time of year. The combined energy is weak at 423, and while the wind is a clean cross-offshore, the conditions are just too small to get excited about. It’s a poor surf day.
Tuesday (August 11th) and Wednesday (August 12th) are similar – marginal at best. A bit of E windswell mixing in, but the periods are short on that, and the bigger period S swell stays small. The cross-off wind keeps the surface clean, but the wave heights hover under 4ft. Not worth rushing out.
Thursday (August 13th) is more of the same: 3ft to 4ft S swell with a moderate period, combined energy creeping up into the moderate zone (847 to 954). Still, it’s a marginal call at best.
Friday (August 14th) gets a bit of a bump with a 6ft to 7ft ENE windswell, but the period is a short 7-8 seconds. That’s choppy, weak energy for a reef break. The wind is still cross-off, but this setup is more interesting for kite surfing than a good paddle session.
Now, Saturday (August 15th) is where things start to get a bit bigger, but it’s a warning sign. We’re looking at 10ft to 12ft ENE swell with periods up to 13 seconds. The combined energy is strong to very strong (2511 to 3981). This is expert-only territory – too big for beginners, and even for experienced surfers, the strong breeze cross-off wind will make it a handful. It’s a marginal forecast.
The real standout, but also a huge caveat, hits Sunday, August 16th. A massive 23ft ENE swell with a 13-second period rolls in, with combined energy roaring up to 18572 – that’s very, very strong. However, the wind switches onshore from the SSE at 37 mph, with a risk of thunderstorms. The guidance flat-out says the swell is too big for Rockpiles. This is not a surf day; this is a watch-from-the-cliff day. The afternoon drops to 20ft but stays cross-on and lumpy. Avoid.
After that storm pulse, Monday (August 17th) through the rest of the week is a rapid drop back to small, marginal conditions. A bit of 5ft to 6ft ENE windswell, but periods are short (7-9 seconds) and the wind goes light to moderate. Combined energy fades back to weak-to-moderate (464 to 859). Nothing really clicks.
The second week, from August 20th onward, is quiet. Mostly small S to SSW groundswells of 1.5ft to 2.5ft with long periods (16-20 seconds), but they’re simply not big enough to break properly at this reef. Combined energy stays in the weak-to-moderate range (232 to 526). The cross-off wind is consistent, but it’s a waiting game.
The only potential light at the end of the tunnel is Tuesday, August 25th, when a 3ft to 4ft S swell with a 16-second period shows up, combined energy hitting 858 to 1009. Still marginal, but with clean cross-off wind, it’s the most promising day in that second week. Don’t hold your breath though – it’s a promise, not a guarantee.
Overall, the first week has one warning-level big swell and otherwise small, marginal surf. The second week is a long flat spell with only a couple of tiny pulses. This stretch looks pretty bleak for paddle surfing. Kite surfers might get some action on the bigger windswell days, but for the rest of us, it’s time to find a different hobby for a while.
Short Range ForecastMostly dry. Warm (max 27°C on Mon afternoon, min 25°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 37mm), heaviest during Sat night. Warm (max 27°C on Sat afternoon, min 25°C on Thu night). Winds increasing (fresh winds from the NE on Thu night, near gales from the SSE by Sun morning). | |||||||||||||||||||
Mon 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | ||||||||||||||
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 8 | SSW 15 | E 7 | SSW 14 | S 20 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | ENE 8 | ENE 8 | ENE 12 | ENE 13 | ENE 13 | ENE 13 | E 11 | ENE 10 |
Wave Graph | ||||||||||||||||||||
176 | 186 | 176 | 269 | 276 | 509 | 498 | 520 | 501 | 662 | 537 | 426 | 474 | 686 | 2274 | 3771 | 6344 | 18206 | 7696 | 901 | |
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 | on | cross-on | cross-on |
High Tide | 2:54PM0.80m | 2:55AM0.26m | 3:35PM0.79m | 3:43AM0.31m | 4:13PM0.75m | 4:30AM0.36m | 4:48PM0.69m | 5:17AM0.40m | 5:22PM0.62m | 6:06AM0.44m | 5:54PM0.53m | 6:57AM0.47m | 6:24PM0.45m | |||||||
Low Tide | 10:10PM0.06m | 8:15AM-0.02m | 10:40PM0.05m | 9:08AM-0.00m | 11:08PM0.04m | 9:58AM0.03m | 11:36PM0.04m | 10:49AM0.08m | 00:03AM0.04m | 11:43AM0.14m | 00:30AM0.05m | 12:43PM0.20m | 00:58AM0.06m | |||||||
— | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | |
7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 20 | 17 | 13 | 3 |
Temp °C | 27 | 26 | 26 | 27 | 25 | 26 | 26 | 25 | 27 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 26 | 26 | 27 | 26 |
Feels °C | 26 | 26 | 25 | 26 | 24 | 24 | 23 | 23 | 24 | 23 | 23 | 23 | 22 | 22 | 24 | 24 | 23 | 24 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 16 | ENE 11 | ENE 10 |
176 | 186 | 165 | 269 | 243 | 509 | 498 | 520 | 501 | 662 | 537 | 416 | 333 | 243 | 225 | 168 | 170 | 329 | 6658 | 901 | |
Swell 2 Height (m) Direction Period (s) | SSW 11 | SSE 9 | SSW 11 | SSE 9 | S 20 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | W 12 | W 11 | W 12 | W 12 | E 12 | W 11 | W 13 | S 18 | W 12 | S 13 | WSW 6 |
42 | 17 | 41 | 16 | 276 | 218 | 218 | 170 | 113 | 11 | 10 | 11 | 11 | 80 | 9 | 30 | 56 | 25 | 119 | 45 | |
Swell 3 Height (m) Direction Period (s) | SSE 10 | SSW 11 | SSE 9 | S 21 | SSE 9 | W 13 | W 12 | W 12 | W 12 | SW 19 | SW 18 | SW 18 | SSW 18 | W 11 | SW 17 | S 16 | W 13 | SSW 19 | S 16 | S 16 |
36 | 23 | 16 | 79 | 15 | 30 | 25 | 25 | 11 | 14 | 13 | 12 | 30 | 21 | 12 | 42 | 30 | 37 | 127 | 81 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | E 7 | ENE 6 | ENE 7 | E 7 | ENE 7 | ENE 8 | ENE 8 | ENE 12 | ENE 13 | ENE 13 | ENE 13 | E 11 | S 6 |
169 | 164 | 176 | 156 | 186 | 155 | 161 | 262 | 233 | 278 | 411 | 426 | 474 | 686 | 2274 | 3771 | 6344 | 18206 | 7696 | 288 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 30 | 1 | 30 | 30 | 1 | 30 | 39 | 30 | 31 | 127 | 31 | 39 | 127 | 30 | 200 | 200 | 182 | 153 | 143 | 45 |
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.











