
Surf Forecasts:
Rockpiles surf forecast from 6 Sep 2026:
- Best quality surf: Monday 7 Sep, 2AM (local time) - 7ft (2.2m), 12s period, ENE swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 2AM (local time) - 11ft (3.5m), 13s period, SW swell with 3,971 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 2AM (local time) - 7ft (2.2m), 12s 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 (Sep 07) at 2AM. The primary swell is predicted to be 2.2m and 12s period with a secondary swell of 1.7m and 14s. 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 3.5m 13s and forecast to arrive on Tuesday (Sep 08) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 10s period and expected on Tuesday (Sep 08) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 7th Sep) | 7ft (2.2m) 12s |
| Best Surf | 2AM (Mon 7th Sep) | 7ft (2.2m) 12s |
| Most Powerful | 2AM (Tue 8th Sep) | 11ft (3.5m) 13s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Alright, this is Rusty. Let’s look at what Rockpiles has in store.
The next 16 days start off shaky. The swell shows up early, but winds and tides are making things ugly. The real fun doesn’t start until the second week rolls around.
Sunday the 6th brings 7ft swell from the ENE with a 19 mph cross-offshore wind. Wave energy is moderate (1951). The surface is clean but the forecast says it’s marginal – likely a tide issue. That afternoon the wind goes cross and drops a bit, but there’s a moderate cross-chop.
Monday the 7th and Tuesday the 8th are total washouts. Onshore winds, rain, and choppy, poor surf. Don’t bother.
Wednesday the 9th drops to 3ft from the SSW, with a long 14-second period. Energy is weak (508). It’s cross-onshore and choppy, but the afternoon lightens up to a light breeze and small ripples. Still marginal.
From Thursday the 10th through Saturday the 12th, we’ve got clean cross-offshore ENE winds, but the swell is small – 4ft to 5ft – with short periods (7-10 seconds). Energy is moderate (900 on Saturday morning). The surf is clean but weak, and the call is marginal.
Then a real lull hits. Sunday the 13th through Tuesday the 15th morning – swell drops to 1ft to 3ft, energy is weak (125-485). The wind is clean, but there’s barely a wave. Some very long-period swells (22 seconds on Monday afternoon) but at 2ft, it’s just a bump.
Now, here’s the good part. Tuesday the 15th – the standout. Morning and afternoon both show 2ft from the SW with a very long 20-second period, and light to gentle NE wind. Energy is moderate (485). The forecast says “expect good surf conditions.” That’s your session. Long-period groundswell on a reef like Rockpiles will produce clean, lined-up waves. Light offshore wind means glassy conditions. The water temp is about 81°F, right on average for this time of year – no anomaly.
Wednesday the 16th and Thursday the 17th keep it going: 3ft to 3ft from the SW/SSW, long periods (16-18 seconds), and cross-offshore wind. Energy is moderate (675-549). The calls are still marginal, but these are clean, workable days for the experienced surfer.
From Friday the 18th through Sunday the 20th, the swell holds between 2ft and 5ft, but the wind stays fresh from the ENE. Energy drops to weak (400-528). The weekend of the 20th-21st shows a small bump in size (4ft-5ft) but with short 8-second periods – that’s windswell, so it’ll be crumbly.
Finally, Monday the 21st – the last day. The morning is a light cross-shore with 4ft from the ENE (8 seconds), marginal. But the afternoon? Glorious. Wind goes glassy, just 3 mph from the SE. Swell is 3ft from the SSW with a 14-second period, energy moderate (448). The forecast says “expect good surf conditions.” Glassy conditions on a reef with that period? That’s a clean, quiet finisher.
The best window is Monday the 15th and into the week of the 16th, with Tuesday the 15th being the absolute pick. Long-period groundswell, light offshore wind, and a clean reef. Not big, but quality. That’s the day to get wet.
Rusty.
Short Range ForecastHeavy rain (total 36mm), heaviest during Sun afternoon. Warm (max 27°C on Sun morning, min 24°C on Sun night). Winds decreasing (fresh winds from the SSE on Mon night, light winds from the SE by Tue night). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Wed afternoon. Warm (max 28°C on Wed afternoon, min 25°C on Wed night). Winds increasing (light winds from the E on Wed afternoon, fresh winds from the ENE by Fri afternoon). | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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 | ENE 12 | ENE 12 | E 12 | SSW 13 | SW 13 | ENE 11 | ENE 11 | ENE 10 | SSW 14 | SSW 13 | ENE 8 | ENE 7 | ENE 7 | SW 16 | SW 16 | ENE 12 | ENE 11 | ENE 10 | ENE 10 | SW 16 |
Wave Graph | |||||||||||||||||||||
1240 | 1064 | 1338 | 784 | 1083 | 3971 | 854 | 627 | 356 | 269 | 257 | 176 | 225 | 186 | 211 | 206 | 343 | 597 | 380 | 339 | 68 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross | cross-on | cross-on | on | on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 1:00PM0.73m | 1:21AM0.26m | 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 | ||||||||
Low Tide | 8:31PM0.10m | 6:25AM0.07m | 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 | ||||||||
6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | |
mm | — | 6 | 10 | 5 | 3 | 8 | 3 | — | 1 | — | 2 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 25 | 26 | 27 | 26 | 27 | 27 | 27 | 27 | 28 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 25 |
Feels °C | 25 | 25 | 26 | 26 | 27 | 25 | 27 | 28 | 30 | 30 | 31 | 27 | 25 | 25 | 24 | 24 | 24 | 23 | 24 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | ENE 12 | ENE 12 | E 12 | SSW 13 | SW 13 | ENE 11 | ENE 11 | ENE 10 | ENE 8 | ENE 8 | E 13 | SSW 13 | E 12 | E 12 | ENE 12 | ENE 12 | SW 15 | ENE 10 | SSW 16 | SSW 13 |
374 | 1064 | 1338 | 784 | 1083 | 3971 | 854 | 627 | 284 | 177 | 149 | 156 | 129 | 101 | 130 | 142 | 343 | 226 | 380 | 99 | 68 | |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 12 | SSW 14 | SW 12 | ENE 12 | ENE 12 | WSW 10 | SSW 8 | SSW 8 | SSW 14 | SSW 13 | SSW 13 | E 12 | SSW 13 | SW 16 | SW 16 | SW 15 | SW 8 | SW 15 | SW 13 | SW 16 |
318 | 517 | 1048 | 480 | 876 | 1211 | 596 | 361 | 128 | 269 | 257 | 176 | 141 | 125 | 211 | 206 | 229 | 18 | 242 | 88 | 64 | |
Swell 3 Height (m) Direction Period (s) | SSE 10 | S 19 | S 18 | SSW 17 | SSW 17 | SSW 15 | SSW 15 | W 9 | SSW 14 | SSW 7 | E 13 | S 7 | SW 16 | SW 18 | SW 10 | SW 9 | NNE 7 | SSW 11 | SW 8 | SW 8 | WSW 8 |
19 | 180 | 240 | 492 | 486 | 487 | 468 | 230 | 356 | 62 | 166 | 25 | 133 | 155 | 49 | 43 | 30 | 25 | 11 | 10 | 6 | |
Wind waves Height (m) Direction Period (s) | ENE 12 | ENE 12 | — | ENE 7 | ENE 7 | SSE 8 | SSW 10 | — | — | — | — | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | — | ENE 11 | ENE 10 | ENE 10 | NE 10 |
1240 | 706 | — | 247 | 198 | 373 | 698 | — | — | — | — | 151 | 225 | 186 | 168 | 140 | — | 597 | 267 | 339 | 376 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 31 | 30 | 0 | 129 | 58 | 79 | 79 | 20 | 16 | 1 | 1 | 1 | 30 | 1 | 2 | 30 | 30 | 1 | 30 | 30 | 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.










