Surf Forecasts:
Rockpiles surf forecast from 28 Aug 2026:
- Most powerful swell: Friday 28 Aug, 2AM (local time) - 3.5ft (1.0m), 16s period, S swell with 482 kJ wave energy.
Best Forecast Surf Conditions for Rockpiles this week:
The most powerful waves expected at Rockpiles in the next 16 days are 1.0m 16s and forecast to arrive on Friday (Aug 28) at 2AM. 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 Friday (Aug 28) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Fri 28th Aug) | 3.5ft (1.0m) 16s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Alright, ol’ Rusty here. Let’s have a look at what’s cookin’ for Rockpiles. It’s a reef setup, pretty exposed to the south swell, and it’s a fairly consistent spot – but it’s gonna take a little patience before we get the good stuff.
Right now, there’s a bit of swell running, but it’s really just a tease. Friday morning we’ve got a 3 ft south swell with a nice long 14-second period, and the energy is sitting at 504 (moderate). The wind is a cross-off from the ENE at 19 mph, so it’s clean, but the surf forecast is marginal – tide’s likely messing with it. That afternoon and into Saturday, the swell jumps up but the direction shifts to a short period ENE windswell, and the wind stays fresh and cross-off, so it’s just a messy, poor setup. Sunday through Tuesday keeps that same ENE windswell, around 5 ft to 6 ft, with periods of 6 to 8 seconds. The energy picks up a bit (up to 823), but the wind is still a fresh cross-off, and the quality is poor to marginal. This stretch is more for the kite crowd than paddle surfing – too much wind and chop for a clean wave on a reef.
Then we hit Wednesday the 2nd of September. The swell drops back to 3 ft, but it’s a long-period south groundswell with 16 seconds between waves. The energy is still strong at 829 (moderate), and the wind is a cross-off from the ENE at 19 mph. The water temp is about average for the time of year, no big anomaly. This is a glimmer, but still marginal. Thursday and Friday (3rd and 4th) stay in that 5 ft to 6 ft range, ENE windswell, with periods stretching to 8 or 9 seconds. The wind backs off a touch to a moderate breeze, and the scores are still low – just not quite there yet.
Now, here’s where it gets exciting. Sunday the 6th of September afternoon, a new SSW swell rolls in at 3 ft with a massive 17-second period. The energy is 784 (moderate), and the wind is a gentle cross-off from the ENE at 9 mph. This is the first proper “expect very good surf conditions” of the run. It’s clean, it’s long-period, and it’s a reef – that’s a beautiful combo. The next morning, Monday the 7th, is the real standout. We’ve got a 3 ft SSW groundswell at 16 seconds, and the energy jumps to 1013 (strong). The wind is virtually nothing – a slight air from the ENE at 3 mph – cross-off and glassy. Excellent conditions for experienced surfers. That afternoon, the swell shifts to a 6 ft ENE at 11 seconds, and the energy goes through the roof at 1510 (very strong). The wind is a light cross-off from the NE at 6 mph. Still clean, still excellent. This is the best on offer: Monday 7th September. The long period means longer lulls and better-shaped waves on the reef, but it’s only for the crew who know what they’re doing.
The rest of the second week has some flashes – Tuesday the 8th is marginal, Wednesday the 9th afternoon has a nice 5 ft ENE swell at 11 seconds with a light cross-off, and that’s a solid “expect very good” call. The 11th and 12th see another pulse of ENE swell around 8 ft, but the wind goes a little cross or cross-on, so it’s not as clean. Still, for the big-wave hunters, Saturday the 12th morning has a clean 6 ft ENE at 10 seconds with light cross-off wind – that’s a good one.
So, to wrap it up: the first week is mostly a write-off unless you’re on a kite. The real deal is Monday the 7th of September – that’s the day to circle. The SSW groundswell morning and the ENE pulse in the afternoon are both excellent. After that, Wednesday the 9th afternoon and Saturday the 12th morning are solid backups. Keep an eye on the wind, though – it’s a cross-off spot, so when it’s light, it’s magic.
Stay salty,
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Fri morning, min 25°C on Thu night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Tue afternoon, min 25°C on Sun night). Mainly fresh winds. | ||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | ||||||||||||||
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 16 | S 14 | S 14 | S 13 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 16 | S 16 | ENE 8 |
Wave Graph | |||||||||||||||||||
482 | 260 | 329 | 229 | 194 | 201 | 316 | 348 | 285 | 248 | 333 | 382 | 372 | 354 | 381 | 372 | 422 | 322 | 331 | |
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 |
High Tide | 4:08AM0.41m | 4:20PM0.62m | 4:47AM0.46m | 4:49PM0.57m | 5:30AM0.50m | 5:18PM0.51m | 6:18AM0.53m | 5:48PM0.44m | 7:14AM0.56m | 6:20PM0.36m | 8:21AM0.59m | 6:54PM0.28m | |||||||
Low Tide | 10:32PM0.08m | 9:46AM0.07m | 10:54PM0.07m | 10:31AM0.10m | 11:17PM0.05m | 11:22AM0.14m | 11:42PM0.05m | 12:22PM0.19m | 00:10AM0.05m | 1:40PM0.23m | 00:43AM0.05m | 3:38PM0.25m | 1:25AM0.06m | ||||||
— | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | |
6:52 | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 |
Temp °C | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 26 | 27 | 27 | 26 |
Feels °C | 22 | 24 | 23 | 22 | 23 | 23 | 22 | 23 | 23 | 22 | 23 | 23 | 22 | 26 | 25 | 25 | 26 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | S 16 | S 14 | S 14 | S 13 | E 13 | E 12 | S 12 | SSW 16 | S 12 | SSW 15 | SSW 15 | SSW 14 | S 19 | SSW 18 | S 18 | S 17 | S 16 | S 16 | S 15 |
482 | 260 | 329 | 229 | 126 | 110 | 102 | 171 | 100 | 199 | 144 | 138 | 192 | 329 | 314 | 280 | 422 | 322 | 279 | |
Swell 2 Height (m) Direction Period (s) | NNE 7 | E 16 | E 15 | E 14 | S 13 | S 13 | E 12 | SSW 12 | SSW 16 | S 11 | S 11 | S 11 | S 10 | S 10 | S 12 | S 13 | E 16 | E 14 | E 13 |
10 | 78 | 109 | 146 | 85 | 89 | 106 | 46 | 162 | 84 | 82 | 55 | 51 | 30 | 77 | 52 | 77 | 103 | 127 | |
Swell 3 Height (m) Direction Period (s) | E 17 | SSW 11 | SSW 19 | SW 19 | S 13 | S 12 | SSW 17 | SSE 12 | ENE 11 | ENE 10 | S 21 | SSW 19 | SSW 14 | SSW 14 | SW 14 | SW 14 | SW 14 | SSE 11 | SSE 11 |
24 | 22 | 36 | 56 | 89 | 75 | 186 | 48 | 40 | 37 | 34 | 122 | 79 | 77 | 51 | 51 | 30 | 22 | 37 | |
Wind waves Height (m) Direction Period (s) | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
213 | 144 | 119 | 167 | 194 | 201 | 316 | 348 | 285 | 248 | 333 | 382 | 372 | 354 | 381 | 372 | 300 | 292 | 331 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 39 | 30 | 127 | 30 | 38 | 44 | 38 | 32 | 44 | 30 | 38 | 38 | 30 | 30 | 38 | 30 | 30 | 31 | 30 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.











