
Surf Forecasts:
Rockpiles surf forecast from 14 Sep 2026:
- Best quality surf: Monday 14 Sep, 5AM (local time) - 1.5ft (0.5m), 14s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 17 Sep, 8PM (local time) - 7ft (2.1m), 9s period, ENE swell with 682 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 5AM (local time) - 1.5ft (0.5m), 14s period with SW 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 14) at 5AM. The primary swell is predicted to be 0.5m and 14s period. 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 2.1m 9s and forecast to arrive on Thursday (Sep 17) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Wednesday (Sep 16) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 14th Sep) | 1.5ft (0.5m) 14s |
| Best Surf | 5AM (Mon 14th Sep) | 1.5ft (0.5m) 14s |
| Most Powerful | 8PM (Thu 17th Sep) | 7ft (2.1m) 9s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s see what we’ve got.
Right now, we’re looking at a pretty slow start. The first week is a bit of a write-off for decent waves, but there’s something brewing for the end of the month that’s worth keeping an eye on.
The surf kicks off on Sunday the 13th, but don’t get excited. Rockpiles is seeing tiny 2ft swell from the SW with a super long 15-second period. The water temp is 81°, which is about average for this time of year. The problem is the wind is a moderate breeze from the ENE at 12 mph, blowing cross-offshore, but the wave energy is weak (133). It’s clean, but it’s just too small and gutless. This pattern sticks around for a few days.
Monday the 14th is more of the same – 2ft at best, with a very long 22-second period. The combined energy is still low (288), and with moderate cross-off winds, it’s a marginal call at best. Tuesday the 15th sees a slight bump to 2ft, but again, the period is long (20 seconds) and the energy is still moderate (438). It’s clean, but the swell is weak and inconsistent.
Wednesday the 16th is a bit more promising, with 3ft from the SW and an 18-second period. The energy is picking up (563), but the wind is freshening to 19 mph from the ENE, still cross-off. It’s clean, but still only marginal.
Then, Thursday the 17th sees a jump to 7ft, but it’s short-period windswell from the ENE at only 7 seconds. The energy is strong (941), but the quality is poor. This is messy, lumpy stuff, and the wind is a fresh 22 mph cross-off. Not a great combo. This kind of short-period, wind-affected swell dominates through the next week.
Friday the 18th brings a drop back to 3ft from the SSW with a 17-second period, and the energy is very strong (1216). It’s a marginal call, but the longer period is a plus. The wind is still fresh from the ENE, so it’s cross-off and clean, but the size is small.
The weekend of the 19th and 20th is back to short-period windswell, 6ft to 7ft from the ENE, with periods of 7-8 seconds. The energy is high (866-940), but it’s poor quality. The wind stays fresh from the ENE, so it’s cross-off and clean, but the wave shape will be junky.
Monday the 21st and Tuesday the 22nd are more of the same, with 5ft to 6ft short-period swell. But Tuesday afternoon is interesting – the swell jumps to 6ft from the ENE with a 13-second period, and the energy is very strong (1497). This is the first real standout of the forecast. The wind is still fresh cross-off, so it’ll be clean, and the longer period means better shape. This could be worth a look, but the crowds might be a factor as Rockpiles can get busy.
Wednesday the 23rd and Thursday the 24th see the biggest swell of the forecast, 8ft to 8ft from the ENE with periods of 9-11 seconds. The energy is very strong (1437-1441). This is big, powerful stuff, and with fresh cross-off winds, it’ll be clean. But at over 8ft, this is for experts only. Beginners should stay out of the water.
The last few days of the forecast, from Friday the 25th to Monday the 28th, show a slow decline. Swell drops from 7ft back to 3ft by Monday, with periods shortening again. The wind stays fresh and cross-off, so conditions remain clean, but the quality fades.
So, the standout window is Tuesday the 22nd through Thursday the 24th, when the swell is biggest and the energy is highest. Tuesday afternoon looks like the sweet spot – 6ft from the ENE with a 13-second period and very strong energy (1497). It’ll be clean with cross-off winds. After that, the size drops and the quality fades.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Sun afternoon, min 25°C on Sun night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Thu night. Warm (max 27°C on Wed afternoon, min 26°C on Wed night). Mainly fresh winds. | |||||||||||||||||||
Sun 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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 15 | SW 12 | SW 23 | SW 22 | SW 21 | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SSW 17 | ENE 7 | ENE 8 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | ENE 8 | SSW 16 | ENE 8 |
Wave Graph | ||||||||||||||||||||
84 | 38 | 86 | 227 | 224 | 392 | 384 | 470 | 455 | 541 | 377 | 389 | 481 | 644 | 622 | 580 | 539 | 373 | 387 | 427 | |
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 | cross-off |
High Tide | 5:11PM0.43m | 6:14AM0.58m | 5:40PM0.36m | 7:02AM0.58m | 6:07PM0.30m | 7:59AM0.57m | 6:32PM0.25m | 9:10AM0.56m | 7:25PM0.21m | 10:27AM0.57m | 11:01PM0.21m | 11:34AM0.59m | 00:19AM0.23m | |||||||
Low Tide | 11:19PM0.06m | 12:45PM0.20m | 11:42PM0.08m | 2:03PM0.23m | 00:07AM0.11m | 4:06PM0.24m | 00:38AM0.13m | 7:14PM0.21m | 1:26AM0.16m | 7:23PM0.18m | 2:56AM0.18m | 7:43PM0.16m | 4:35AM0.17m | |||||||
— | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | |
6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 1 | — | — | — | — | — |
Temp °C | 27 | 26 | 26 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 26 | 27 | 26 |
Feels °C | 27 | 26 | 25 | 26 | 27 | 28 | 27 | 26 | 26 | 26 | 26 | 26 | 24 | 26 | 25 | 24 | 27 | 26 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | NNE 9 | NE 9 | NE 8 | NE 8 | NE 8 | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SSW 17 | SW 16 | SW 16 | SSW 18 | ENE 8 | SSW 17 | SSW 16 | SSW 15 | E 8 | SSW 14 |
99 | 79 | 58 | 54 | 31 | 392 | 384 | 470 | 455 | 541 | 377 | 258 | 258 | 644 | 394 | 580 | 539 | 372 | 341 | 154 | |
Swell 2 Height (m) Direction Period (s) | SSW 15 | SW 12 | SW 14 | SW 22 | SW 21 | NNE 8 | NNE 8 | E 11 | SW 12 | SW 11 | E 10 | SSW 20 | SSW 19 | SSE 10 | SSW 17 | SSE 7 | S 20 | SSW 18 | SSW 16 | S 16 |
84 | 38 | 49 | 227 | 224 | 25 | 34 | 58 | 35 | 43 | 94 | 149 | 210 | 9 | 622 | 20 | 67 | 106 | 387 | 195 | |
Swell 3 Height (m) Direction Period (s) | SW 12 | ENE 8 | SW 23 | SW 14 | SSW 13 | E 12 | E 12 | NNE 8 | S 9 | S 8 | SSW 11 | SW 11 | SSE 10 | WSW 10 | SSE 10 | W 9 | SSE 6 | SSE 6 | SSW 18 | SW 15 |
37 | 14 | 86 | 49 | 68 | 46 | 68 | 23 | 6 | 5 | 12 | 18 | 10 | 9 | 9 | 7 | 7 | 14 | 106 | 110 | |
Wind waves Height (m) Direction Period (s) | ENE 9 | ENE 4 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | ENE 10 | ENE 6 | ENE 6 | ENE 7 | ENE 8 | ENE 9 | — | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
59 | 8 | 27 | 28 | 49 | 32 | 41 | 42 | 331 | 156 | 227 | 389 | 481 | 547 | — | 394 | 333 | 373 | 196 | 427 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1 | 0 | 30 | 1 | 1 | 28 | 2 | 1 | 30 | 127 | 30 | 33 | 33 | 31 | 38 | 38 | 30 | 31 | 31 | 30 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.










