
Surf Forecasts:
Rockpiles surf forecast from 8 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 5AM (local time) - 3ft (0.9m), 14s period, SSW swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 11PM (local time) - 15ft (4.5m), 15s period, SW swell with 8,029 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 5AM (local time) - 3ft (0.9m), 14s period with SSW 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 5AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 1.2m and 10s. Another secondary swell of 0.9m and 8s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Rockpiles in the next 16 days are 4.5m 15s and forecast to arrive on Monday (Sep 07) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 11s period and expected on Tuesday (Sep 08) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 9th Sep) | 3ft (0.9m) 14s |
| Best Surf | 5AM (Wed 9th Sep) | 3ft (0.9m) 14s |
| Most Powerful | 11PM (Mon 7th Sep) | 15ft (4.5m) 15s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Alright, surfers, Rusty here. Let’s have a look at what’s on the cards for Rockpiles over the next couple of weeks.
Right off the bat, I gotta be straight with you – the first few days are a bit of a write-off. We’ve got a big pulse of energy rolling in on Monday the 7th, with a combined energy of (2716) and a solid 8ft swell from the ENE, but the wind is a messy cross-shore from the ESE at 16 mph. Throw in a risk of thunderstorms and that’s a no-go. Monday afternoon gets even worse with a 22 mph cross-onshore. Tuesday the 8th is a washout too, with onshore winds and poor conditions. So, we’re looking at a rough start.
The first glimmer of hope comes on Wednesday the 9th. The morning is still a bit marginal with a 3ft SSW swell and light cross-onshore winds, but the afternoon clears up. We’ll see 3ft of SSW swell, period pushing 13 seconds, light 6 mph cross-offshore winds from the ENE, and the water is a balmy 81°F – about normal for this time of year. The surf will be clean and rideable, though nothing to write home about with a combined energy of (563). It’s a good session for a longboard or a funboard.
Thursday the 10th and Friday the 11th are frustrating. The wind is clean and cross-offshore, but the swell drops off. Thursday morning sees 5ft of short-period ENE windswell (7 seconds) and a combined energy of (656), but it’s just not got the punch. By Friday afternoon, we’re back to 4ft on a 11 second period from the ENE with a combined energy of (571). Clean, but weak.
Honestly, the standout window is looking like the middle of the second week. The best on offer is Wednesday the 16th of September. The afternoon session has a 3ft SSW groundswell with a long 18-second period, combined energy of (774), and clean cross-offshore winds from the ENE at 12 mph. The wind is light enough to keep the surface glassy. This is a reef break, and that long-period groundswell will wrap in nicely here, offering some proper shape. Keep in mind that long period like this can make beach breaks a bit straight, but for a reef like Rockpiles, it’s a recipe for quality. It’s still a smaller day, but the quality will be there.
After that, the wind starts to howl. From Friday the 18th onwards, we’ve got strong breeze to strong breeze conditions with 25 mph winds, which just kills the surf, even if the swell is around. The last week of the window is a total write-off with small, blown-out conditions.
So, to wrap it up: the first week is a dud, but if you’re patient, Wednesday the 16th afternoon is your best bet. It won’t be a big day, but it’ll be clean, lined up, and you’ll have the place to yourself. Fingers crossed the forecasts hold.
Rusty.
Short Range ForecastHeavy rain (total 25mm), heaviest during Mon morning. Warm (max 28°C on Tue afternoon, min 26°C on Mon morning). Winds decreasing (strong winds from the SSE on Mon night, calm by Wed morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Thu morning, min 25°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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 12 | SW 14 | SSW 13 | SSW 10 | ENE 11 | ENE 10 | SSW 14 | SSW 13 | ENE 7 | ENE 7 | ENE 7 | SW 16 | SW 16 | ENE 11 | ENE 11 | SW 15 | ENE 10 | ENE 9 | ENE 9 | SSW 15 | SSW 14 |
Wave Graph | |||||||||||||||||||||
1670 | 1999 | 6954 | 959 | 608 | 378 | 269 | 257 | 177 | 203 | 197 | 211 | 261 | 313 | 240 | 242 | 128 | 115 | 47 | 84 | 80 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | on | on | cross-on | on | cross-on | 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 | 1:47PM0.73m | 2:09AM0.32m | 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 | ||||||||
Low Tide | 8:57PM0.08m | 7:26AM0.06m | 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 | ||||||||
6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | |
mm | 6 | 4 | 11 | 2 | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 27 | 27 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 27 | 27 | 24 | 26 | 29 | 31 | 30 | 30 | 31 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 26 | 25 | 25 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 14 | ENE 12 | W 11 | SSW 8 | ENE 10 | ENE 9 | ENE 8 | ENE 7 | E 12 | ENE 7 | E 11 | ENE 7 | SW 15 | ENE 11 | ENE 10 | ENE 10 | ENE 9 | NE 8 | NE 9 | NE 8 |
488 | 1999 | 1302 | 935 | 422 | 378 | 165 | 140 | 177 | 141 | 197 | 93 | 105 | 229 | 240 | 163 | 128 | 115 | 74 | 59 | 58 | |
Swell 2 Height (m) Direction Period (s) | SSE 8 | E 12 | SSW 15 | ENE 11 | ENE 11 | SSW 8 | SSW 14 | SSW 13 | E 13 | SSW 13 | E 12 | SW 16 | SW 16 | NNE 8 | SW 15 | NE 8 | NE 9 | NE 9 | E 5 | ENE 9 | SSW 14 |
104 | 672 | 581 | 870 | 608 | 137 | 269 | 257 | 156 | 131 | 101 | 211 | 261 | 22 | 226 | 74 | 79 | 77 | 19 | 31 | 80 | |
Swell 3 Height (m) Direction Period (s) | SSW 16 | S 8 | NNW 12 | SSW 15 | W 9 | SSW 14 | E 13 | E 13 | SSW 13 | SSW 16 | SSW 13 | SW 10 | E 11 | SW 9 | NNE 7 | SW 15 | SW 16 | SSW 13 | ENE 9 | SSW 15 | ENE 8 |
454 | 173 | 15 | 474 | 235 | 356 | 168 | 166 | 176 | 181 | 127 | 51 | 119 | 29 | 26 | 242 | 124 | 68 | 47 | 84 | 14 | |
Wind waves Height (m) Direction Period (s) | ENE 12 | ENE 8 | SSW 13 | SSW 10 | — | — | — | — | SE 4 | ENE 7 | — | ENE 7 | — | ENE 11 | — | — | — | — | — | E 5 | ENE 4 |
1670 | 395 | 6954 | 959 | — | — | — | — | 7 | 203 | — | 140 | — | 313 | — | — | — | — | — | 12 | 10 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 218 | 124 | 126 | 143 | 16 | 16 | 1 | 0 | 0 | 30 | 1 | 1 | 1 | 1 | 0 | 30 | 1 | 1 | 30 | 1 | 0 |
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.










