
Surf Forecasts:
Rockpiles surf forecast from 9 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 2AM (local time) - 4.5ft (1.4m), 10s period, ENE swell with glassy winds.
- Most powerful swell: Tuesday 8 Sep, 5PM (local time) - 5.5ft (1.7m), 11s period, ENE swell with 650 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 2AM (local time) - 4.5ft (1.4m), 10s 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 Wednesday (Sep 09) at 2AM. The primary swell is predicted to be 1.4m and 10s period with a secondary swell of 1.0m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Rockpiles in the next 16 days are 1.7m 11s and forecast to arrive on Tuesday (Sep 08) 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 1.1m 8s period and expected on Monday (Sep 14) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 9th Sep) | 4.5ft (1.4m) 10s |
| Best Surf | 2AM (Wed 9th Sep) | 4.5ft (1.4m) 10s |
| Most Powerful | 5PM (Tue 8th Sep) | 5.5ft (1.7m) 11s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s get into it.
Right off the bat, we’ve got a few rough days to sit through. Tuesday the 8th is a write-off – we’re looking at rain squalls and a strong cross-onshore wind of 19 mph kicking up a lumpy, 8 ft mess. The combined energy is a hefty 2361, but it’s all noise with that wind. Not worth paddling out.
Things start to turn around on Wednesday the 9th. The wind swings light and cross-offshore, dropping to just 3 mph in the morning. That’s the clean air we’re after. Swell eases to a nice 3 ft, but the period stretches out to 14 seconds – proper groundswell. This is the pick of the whole outlook. The wave energy is moderate at 631, so it’s not a beast, but it’ll be smooth, lined-up, and fun on the reef at Rockpiles. The water temp is sitting at a very average 81°, nothing unusual there. Wednesday arvo stays clean too with the same 3 ft and a 13-second period, though the wind picks up just a little. If you can only get one session, make it Wednesday morning.
Thursday the 10th sees the swell bump up to 5 ft but period drops to a junky 7 seconds. Wind stays cross-off but it’s a moderate 16 mph. It’ll look clean on the surface, but those short-period waves will be crumbly and weak. The energy is moderate at 643, but it’s more of a background hump than proper surf. Not a standout.
From Friday the 11th right through to mid-next week, the swell stays small – mostly between 1 ft and 4 ft – and the wind stays moderate cross-offshore. The period bounces around between 11 and 22 seconds, but the height just isn’t there to make much of it. Wave energy drops into the hundreds, even dipping into double digits on Monday the 14th with just 69. That’s a weak signal. Tuesday the 15th offers a tiny bit more pulse with 2 ft and a 20-second period, but it’s still marginal. Honestly, this stretch is mostly for loggers or a longboard if you’re desperate, but I wouldn’t get too excited.
There’s a bit of a spike on Thursday the 17th, with the swell jumping to 6 ft. But before you grab your board, look at the wind: 28 mph from the ENE, cross-offshore. That’s a strong breeze. The energy hits 1040 in the afternoon, so there’s some serious power, but those massive winds will make it a battle. It’s more of a kite-surfing setup than a paddle session.
After that, the last week of the outlook drifts back into small, windy conditions. Swell around 2 ft to 6 ft, but with fresh to strong breezes every day. The period drops to short, 7-second stuff again, and the wave energy mostly sits in the low hundreds to mid-500s. No real standouts. It’s a bit of a flat, windy end to the 16-day window.
So, to sum it up: your one true session is Wednesday the 9th. That 3 ft of 14-second groundswell with near-glass conditions is as good as it gets. After that, it’s a long dry spell with only marginal or windy options.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Wed night. Warm (max 28°C on Tue afternoon, min 24°C on Thu night). Winds increasing (calm on Tue night, fresh winds from the ENE by Thu afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Mon morning, min 25°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | ||||||||||||||
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 11 | ENE 10 | SSW 14 | SSW 13 | ENE 7 | ENE 7 | ENE 7 | SW 16 | ENE 11 | ENE 11 | ENE 10 | SW 15 | SW 16 | SSW 13 | SW 15 | SSW 15 | SW 14 | SW 23 | SW 22 | SW 21 |
Wave Graph | ||||||||||||||||||||
650 | 378 | 269 | 257 | 177 | 231 | 186 | 268 | 314 | 249 | 292 | 242 | 124 | 68 | 107 | 84 | 54 | 86 | 227 | 224 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross | 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 | 2:28PM0.72m | 2:51AM0.39m | 3:05PM0.69m | 3:32AM0.45m | 3:39PM0.64m | 4:11AM0.50m | 4:12PM0.57m | 4:51AM0.54m | 4:42PM0.50m | 5:31AM0.57m | 5:11PM0.43m | 6:14AM0.58m | 5:40PM0.36m | |||||||
Low Tide | 9:22PM0.06m | 8:21AM0.06m | 9:46PM0.05m | 9:12AM0.07m | 10:10PM0.04m | 10:02AM0.10m | 10:33PM0.04m | 10:52AM0.13m | 10:56PM0.05m | 11:45AM0.17m | 11:19PM0.06m | 12:45PM0.20m | 11:42PM0.08m | |||||||
— | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | |
6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | |
mm | — | — | — | — | 3 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 27 | 27 | 27 | 27 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 26 |
Feels °C | 29 | 30 | 30 | 30 | 30 | 26 | 25 | 25 | 25 | 25 | 25 | 27 | 26 | 25 | 26 | 25 | 27 | 27 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | ENE 10 | ENE 9 | ENE 8 | ENE 7 | ENE 7 | SSW 13 | SW 16 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | NE 9 | NE 9 | ENE 8 | NE 9 | NE 8 | NE 8 | NE 8 |
477 | 378 | 194 | 140 | 177 | 231 | 129 | 268 | 314 | 249 | 292 | 128 | 98 | 75 | 75 | 75 | 81 | 69 | 55 | 53 | |
Swell 2 Height (m) Direction Period (s) | ENE 11 | SSW 8 | SSW 14 | SSW 13 | E 13 | SSW 13 | E 12 | E 11 | SW 16 | SW 15 | SW 15 | SW 15 | NE 9 | E 5 | E 5 | NE 9 | SW 12 | SW 14 | SW 22 | SW 21 |
650 | 137 | 269 | 257 | 156 | 131 | 101 | 93 | 261 | 229 | 226 | 242 | 77 | 14 | 29 | 79 | 38 | 49 | 227 | 224 | |
Swell 3 Height (m) Direction Period (s) | W 8 | SSW 14 | E 13 | E 13 | SSW 13 | E 12 | SW 18 | S 12 | NNE 8 | NNE 8 | SSW 11 | NE 8 | SW 16 | SSW 13 | SW 15 | SSW 15 | SW 14 | SW 23 | SW 14 | SSW 13 |
130 | 356 | 168 | 166 | 176 | 104 | 154 | 67 | 37 | 39 | 23 | 54 | 124 | 68 | 107 | 84 | 54 | 86 | 49 | 68 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | ENE 7 | ENE 7 | — | — | — | — | — | — | — | ENE 6 | ENE 6 | ENE 5 | ENE 5 | ENE 5 |
— | — | — | — | — | — | 186 | 136 | — | — | — | — | — | — | — | 33 | 42 | 29 | 29 | 42 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 16 | 0 | 1 | 0 | 0 | 30 | 30 | 1 | 1 | 1 | 0 | 6 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 |
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.










