
Surf Forecasts:
Rockpiles surf forecast from 9 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 5AM (local time) - 4.5ft (1.3m), 10s period, ENE swell with glassy winds.
- Most powerful swell: Tuesday 15 Sep, 11PM (local time) - 2.5ft (0.8m), 19s period, SSW swell with 480 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 5AM (local time) - 4.5ft (1.3m), 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 5AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 1.3m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Rockpiles in the next 16 days are 0.8m 19s and forecast to arrive on Tuesday (Sep 15) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 8s period and expected on Monday (Sep 14) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 9th Sep) | 4.5ft (1.3m) 10s |
| Best Surf | 5AM (Wed 9th Sep) | 4.5ft (1.3m) 10s |
| Most Powerful | 11PM (Tue 15th Sep) | 2.5ft (0.8m) 19s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Alright, Rusty here. Let's break down what's coming for the next 16 days.
The water temp at Rockpiles is about 81° – right on average for this time of year.
We start Wednesday morning with small, clean lines. A 3ft swell from the SSW with decent energy (631), but the period is short, so the shape might be so-so.
Thursday morning brings a bit more size – 5ft – but the wind cranks up from the ENE at 12 mph. It's clean, but the swell period is a short 7 seconds, so it'll be messy. Thursday afternoon gets even windier at 22 mph, and the swell drops to 5ft. The score is poor, and with that much wind, this is looking more like a kite session than a paddle session.
Friday is a little better: 4ft swell with an 11-second period, wind at 12 mph from the ENE. It's cross-off and clean. Not a standout, but a possible go.
Now, the first real highlight is Saturday morning (12th September). The swell drops to 2ft, but check out the period – a long 15 seconds. This is clean groundswell from the SW. Wind is light and cross-off from the ENE at 9 mph. It's small, but the quality will be glassy and fun. The energy is moderate (364). For a clean, cruisy session, this is the pick of the first week.
Sunday and Monday go flat. On Tuesday (15th), the swell bumps back to 2ft from the SW with a long 20-second period. Wind is light at 6 mph. Again, small but clean. A good afternoon session.
From Wednesday (16th), size starts building. We hit 3ft SW swell with 18-second periods, but the wind picks up to 12-22 mph and stays strong for the rest of the week.
Then the second week looks interesting. Sunday 20th September has a 8ft E swell with an 8-second period. That's big, but the short period means it'll be walled up – expert territory only, and winds are still fresh at 16-19 mph.
The real standout of the whole outlook is Tuesday 22nd and Wednesday 23rd September. Tuesday morning brings a solid 7ft swell from the East with a 13-second period. The combined energy is massive at 1354, jumping to 1791 by the afternoon. This is powerful, active swell. The wind is cross-off at 16 mph, so it's clean. Wednesday is very similar – 6ft, 12-second period, ENE wind at 19 mph. This is the big groundswell window. The swell direction is a good match for Rockpiles. This is the time for experienced surfers. Beginners, stay well away – over 5ft is too big.
After that, Thursday 24th holds at 6ft to 7ft from the East, but the wind swings cross-on from the SE, making it choppier. Still powerful (1027 energy), but the quality drops.
So, to sum it up: the first few days are small and clean. Saturday 12th is your best bet for a small but glassy session. The big prize is Tuesday 22nd and Wednesday 23rd – that's proper, powerful groundswell with clean conditions for those who can handle it.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Thu morning. Warm (max 27°C on Wed morning, min 25°C on Thu night). Winds increasing (calm on Wed morning, fresh winds from the ENE by Thu afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Sun afternoon, min 25°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
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) | SSW 14 | SSW 13 | E 13 | ENE 7 | ENE 7 | SW 16 | ENE 11 | ENE 11 | ENE 10 | SW 15 | SW 16 | SSW 13 | SW 15 | SSW 15 | SSW 13 | SW 23 | SW 22 | SW 21 | SW 20 | SW 19 | SSW 19 |
Wave Graph | |||||||||||||||||||||
269 | 257 | 176 | 237 | 183 | 268 | 331 | 265 | 245 | 242 | 124 | 99 | 107 | 84 | 62 | 86 | 227 | 224 | 392 | 384 | 470 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore 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 | off | cross-off | cross-off | cross-off |
High Tide | 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 | 7:02AM0.58m | 6:07PM0.30m | ||||||||
Low Tide | 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 | 2:03PM0.23m | 00:07AM0.11m | |||||||
6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | |
— | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | |
mm | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 27 | 25 | 26 | 27 | 26 | 26 | 27 | 26 |
Feels °C | 31 | 31 | 31 | 28 | 27 | 26 | 26 | 25 | 26 | 27 | 26 | 25 | 27 | 27 | 24 | 26 | 26 | 26 | 29 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | ENE 9 | ENE 8 | ENE 8 | E 12 | ENE 7 | SW 16 | ENE 11 | SW 15 | ENE 10 | E 10 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 8 | SW 22 | NE 8 | SW 20 | SW 19 | NE 7 |
194 | 120 | 128 | 141 | 183 | 268 | 331 | 229 | 245 | 122 | 77 | 77 | 77 | 75 | 79 | 74 | 227 | 32 | 392 | 384 | 100 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 13 | E 13 | SSW 13 | SSW 13 | E 11 | SW 16 | NNE 8 | SW 15 | SW 15 | ENE 10 | ENE 9 | E 9 | ENE 5 | SSW 13 | SW 14 | ESE 5 | SW 21 | SW 13 | SW 12 | SSW 19 |
269 | 257 | 156 | 131 | 129 | 93 | 261 | 39 | 226 | 242 | 98 | 64 | 78 | 23 | 62 | 49 | 9 | 224 | 41 | 38 | 470 | |
Swell 3 Height (m) Direction Period (s) | E 13 | E 13 | SSW 13 | SSW 16 | E 12 | S 12 | NNE 8 | SSW 12 | SSW 11 | NE 8 | SW 16 | SSW 13 | SW 15 | SSW 15 | ENE 8 | SW 23 | SW 14 | SSW 13 | WSW 8 | WSW 8 | E 7 |
168 | 166 | 176 | 181 | 101 | 69 | 26 | 46 | 23 | 70 | 124 | 99 | 107 | 84 | 14 | 86 | 49 | 68 | 6 | 6 | 24 | |
Wind waves Height (m) Direction Period (s) | — | — | — | ENE 7 | — | ENE 7 | — | ENE 11 | E 5 | — | — | — | — | — | ENE 5 | ENE 5 | NE 8 | ENE 5 | NE 8 | NE 7 | — |
— | — | — | 237 | — | 136 | — | 265 | 11 | — | — | — | — | — | 42 | 28 | 132 | 32 | 113 | 136 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 0 | 0 | 31 | 30 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 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.










