Surf Forecasts:
Rockpiles surf forecast from 14 Aug 2026:
- Best quality surf: Monday 17 Aug, 5AM (local time) - 6ft (1.9m), 8s period, ENE swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 5AM (local time) - 16ft (5.0m), 10s period, E swell with 4,583 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 5AM (local time) - 6ft (1.9m), 8s 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 Monday (Aug 17) at 5AM. The primary swell is predicted to be 1.9m and 8s period with a secondary swell of 0.9m and 15s. Another secondary swell of 0.8m and 7s 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 5.0m 10s and forecast to arrive on Sunday (Aug 16) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 7s period and expected on Wednesday (Aug 19) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 17th Aug) | 6ft (1.9m) 8s |
| Best Surf | 5AM (Mon 17th Aug) | 6ft (1.9m) 8s |
| Most Powerful | 5AM (Sun 16th Aug) | 16ft (5.0m) 10s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get real about the next couple of weeks. We’re looking at a long run of tricky conditions at Rockpiles, so don’t get your hopes up too high too early. The wind is going to be a persistent problem for most of the forecast, and the swell just doesn’t know what to do with itself.
The outlook kicks off on Friday, August 14th, with a solid 7 ft of swell out of the ENE, but it’s a short-period 8 second wind swell. The combined energy is moderate, sitting at (963), but that cross-off wind from the NE at 22 mph is going to wreck the surface. It’s clean in the sense of no chop, but the wind state is just too strong for truly good waves. This one is a miss for paddle surfing.
The swell builds through Saturday, August 15th and into Sunday, August 16th, hitting 12 ft with a bit more period (9-10 seconds). The energy gets strong, hitting (1793) and (2504), but the wind is near-gale force on Saturday and turning cross-shore on Sunday with a messy cross-chop. For the average surfer, this is a kite-surfing show, not a paddle session. At 12 ft, this is only for the experts anyway, and even then, the conditions are poor.
We get a little drop in size on Monday, August 17th, down to 6 ft, but the wind is still a stiff cross-off at 16-19 mph. The energy is moderate (712), but the quality is just marginal. The same story carries through Tuesday, August 18th, with a tiny 2 ft southern swell (13-second period). The energy is weak (419), and the wind is still too strong to make it fun.
Wednesday, August 19th and Thursday, August 20th are a bit of a tease. The swell is small (3 ft and 2 ft), but the wind drops to a moderate breeze (12 mph) and then a gentle breeze (9 mph). The southern swell on Thursday has a long 18-second period, which is a groundswell, but the size is tiny (2 ft). The energy is weak (301-360). It’s clean, but there’s barely a wave to ride.
The only real standout in this whole 16-day window is Saturday, August 22nd. In the afternoon, we get a tiny 2 ft swell from the SW with a 16-second period, but the wind is finally light and cross-off from the ENE at only 9 mph. The conditions are clean, and the energy is a weak (375). It’s not a bomb, but it’s the best we’re going to get. The wave state is listed as "expect good surf conditions," which is the highest quality we see here. For a reef break like Rockpiles, that long period SW groundswell could wrap in nicely, even if small. The water temp is about average for the time of year, so no surprises there.
After that, the rest of the month into early September (27th-29th) sees the swell pick back up to 7 ft from the ENE, but the wind is a fresh to strong breeze again, keeping the surf marginal at best. The energy climbs back into the 700-1000 range, but the wind is relentless.
So, the honest truth? This is a tough forecast. The only real moment to be in the water is Saturday afternoon, August 22nd. It’s small, it’s clean, and it’s the best of a long, windy bunch. Don’t expect much else. Keep an eye on the long-range, but don’t book the day off work just yet.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Sun morning. Warm (max 27°C on Fri afternoon, min 25°C on Thu night). Mainly near gales. | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Sun night. Warm (max 26°C on Sun night, min 25°C on Mon night). Mainly fresh winds. | ||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | ||||||||||||||
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) | S 15 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 10 | E 10 | ENE 9 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | E 8 | SW 16 |
Wave Graph | |||||||||||||||||||
537 | 540 | 555 | 1081 | 1556 | 1751 | 3406 | 2134 | 1023 | 511 | 356 | 268 | 225 | 162 | 162 | 159 | 140 | 124 | 129 | |
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 | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 5:17AM0.40m | 5:22PM0.62m | 6:06AM0.44m | 5:54PM0.53m | 6:57AM0.47m | 6:24PM0.45m | 7:54AM0.49m | 6:52PM0.37m | 8:59AM0.51m | 7:16PM0.30m | 10:13AM0.53m | ||||||||
Low Tide | 11:36PM0.04m | 10:49AM0.08m | 00:03AM0.04m | 11:43AM0.14m | 00:30AM0.05m | 12:43PM0.20m | 00:58AM0.06m | 1:59PM0.25m | 1:27AM0.08m | 3:56PM0.27m | 2:01AM0.10m | 2:47AM0.12m | |||||||
— | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | |
7:02 | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | |
mm | — | — | — | — | — | 1 | 2 | 4 | 5 | 7 | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 27 | 25 | 26 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 24 | 22 | 24 | 22 | 22 | 22 | 21 | 20 | 27 | 28 | 28 | 25 | 24 | 23 | 23 | 24 | 26 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 14 | S 16 | SSE 8 | SSE 7 | S 14 | ENE 7 | S 13 | S 13 | S 13 | ENE 8 | ENE 8 | E 8 | E 8 |
537 | 411 | 411 | 306 | 225 | 168 | 175 | 333 | 268 | 108 | 268 | 268 | 170 | 162 | 162 | 159 | 140 | 124 | 78 | |
Swell 2 Height (m) Direction Period (s) | W 11 | W 12 | E 11 | W 11 | W 11 | W 13 | S 18 | W 12 | S 16 | S 14 | S 6 | S 14 | S 5 | SW 17 | SW 18 | S 13 | SW 16 | NNE 7 | NE 7 |
10 | 11 | 62 | 9 | 9 | 30 | 101 | 25 | 127 | 250 | 38 | 260 | 8 | 74 | 79 | 116 | 129 | 38 | 47 | |
Swell 3 Height (m) Direction Period (s) | SW 18 | SW 18 | W 12 | SW 17 | SW 17 | S 19 | W 13 | SSW 19 | S 13 | S 16 | SW 18 | S 6 | W 11 | E 9 | E 9 | SW 18 | S 12 | SSW 16 | SW 16 |
13 | 12 | 11 | 12 | 12 | 64 | 30 | 37 | 86 | 81 | 50 | 24 | 10 | 25 | 15 | 79 | 44 | 100 | 129 | |
Wind waves Height (m) Direction Period (s) | E 7 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 10 | E 10 | ENE 9 | ENE 8 | ENE 8 | — | ENE 7 | ENE 7 | ENE 7 | — | — | — | — |
423 | 540 | 555 | 1081 | 1556 | 1751 | 3406 | 2134 | 1023 | 511 | 356 | — | 225 | 158 | 145 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 31 | 39 | 127 | 200 | 157 | 200 | 156 | 349 | 44 | 1 | 30 | 30 | 1 | 30 | 30 | 30 | 1 | 1 | 1 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.











