Rockpiles Surf Break

Lat Long: 21.28° N 157.84° W

Rockpiles Surf Forecast and Surf Report

Issued: 7 pm 09 Sep 2026 (local time)

Forecast update in  hr  min

Today's Rockpiles sea temperature is
26.9°C
0.1° 

Rockpiles surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Rockpiles surf forecast from 10 Sep 2026:

  • Best quality surf: Wednesday 16 Sep, 2AM (local time) - 2.5ft (0.8m), 19s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 16 Sep, 5PM (local time) - 3ft (0.9m), 18s period, SSW swell with 541 kJ wave energy.
  • Next surfable swell (1★+): Thursday 10 Sep, 2AM (local time) - 2.5ft (0.7m), 13s 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 Thursday (Sep 10) at 2AM. The primary swell is predicted to be 0.7m and 13s period with a secondary swell of 1.1m and 8s. Another secondary swell of 0.7m and 13s is also forecast. 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 0.9m 18s and forecast to arrive on Wednesday (Sep 16) at 5PM. 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 9s period and expected on Sunday (Sep 13) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Thu 10th Sep)2.5ft (0.7m) 13s
Best Surf 2AM (Wed 16th Sep)2.5ft (0.8m) 19s
Most Powerful 5PM (Wed 16th Sep)3ft (0.9m) 18s

Table - best surf conditions forecast for Rockpiles over the next 16 days.


The Lowdown

Alright, let’s get into it. This is Rusty, and I’m looking at the next few weeks for Rockpiles. It’s a reef break, and it’s got some serious potential, but we’ve got to pick our moments.

The overall pattern? It’s a slow burner. The forecast starts off pretty average, with small, short-period swell and a persistent cross-offshore breeze that keeps things clean but doesn’t do much for the wave quality. We’ve got a few days of marginal conditions before things start looking a bit more interesting in the second week. The real standout? That’s looking like Tuesday, the 15th of September, and Wednesday, the 16th.

Right now, on Thursday the 10th, we’ve got a 5ft swell from the ENE, but with a period of only 7 seconds, it’s just too weak and short to really get the reef working. The energy is only moderate at 477 (combined energy of all swells directed here). The wind is a cross-off from the ENE, which is fine for the surface, but the waves are just too weak.

Friday the 11th is a step up. The swell drops a touch to 4ft, but the period jumps to 11 seconds, which is a proper groundswell. The energy is a moderate 648. Still, the wind is a clean cross-off, so the surface will be nice. It’s a marginal call, but it’s a better prospect than Thursday.

Now, the weekend and early next week are small. Saturday the 12th drops to 2ft, and by Sunday and Monday, we’re looking at ankle-biters with a few long-period pulses that are just too small to push. Energy drops right down to 135 (combined energy of all swells directed here) on Monday the 14th. A big gap of small, flat days.

Then we hit the sweet spot. Tuesday the 15th of September – this is the standout. We’ve got a 2ft swell from the SW, but with a period of 20 seconds. That is a very long period groundswell. The energy is moving back up to 408. The wind swings to light cross-shore in the morning then a gentle cross-off in the afternoon. For a reef break like Rockpiles, this long-period swell is perfect. The waves will have serious shape, power, and long, clean walls. This is the one to circle on the calendar.

Wednesday the 16th is a very close second. The swell picks up to 3ft from the SSW, still with an 18-second period. Energy is a solid 670. The wind is a cross-off in the afternoon, keeping it clean. The only hiccup is a risk of thunderstorms in the morning, but that often brings glassy conditions. If you can get out in the afternoon, it’ll be firing. The optimum swell direction for Rockpiles is SSE, so this SSW pulse is a great match.

After that, from the 17th through the 19th, the wind gets strong – fresh to strong breeze from the ENE. The swell hangs around, but the wind is just too much for quality surf. It’ll be choppy and blown out, maybe more of a kite session.

The end of the run, around the 20th to the 25th, sees a shift back to shorter-period ENE swell. The size comes up to around 4ft to 5ft, but the period drops back to 8 or 9 seconds. The energy stays moderate (around 500-700), but it’s not the same quality as those groundswell days. It’s a couple of weeks out, so long-range, but it looks like a return to smaller, less exciting surf.

Water temperature? It’s about average for this time of year, nothing out of the ordinary for Rockpiles.

So, to wrap it up: the best bet is Tuesday the 15th and Wednesday the 16th of September. The long-period SW swells with clean winds will make Rockpiles a proper gem. Get on it.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Wed night. Warm (max 27°C on Wed night, min 24°C on Fri night). Winds increasing (light winds from the NE on Wed night, fresh winds from the ENE by Thu afternoon).

Days 5-7 Weather Summary

Mostly dry. Warm (max 27°C on Mon afternoon, min 25°C on Sat night). Wind will be generally light.

Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
0
2
1
2
1
1
1
0
0
0
0
0
1
2
1
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
E
13
1.4
ENE
7
1.4
ENE
7
0.7
SW
16
1.3
ENE
11
1.1
E
11
0.7
SW
15
0.7
SW
15
0.8
ENE
10
0.7
ENE
9
0.5
SW
15
0.4
SSW
15
0.4
SW
12
0.3
SW
23
0.5
SW
22
0.5
SW
21
0.7
SW
20
0.7
SW
19
0.8
SSW
19
Wave Graph
Metric surfscale
Energy kJ
176
203
188
268
387
286
227
242
125
84
107
84
38
86
227
224
392
384
470
Wind (km/h)
15
ENE
20
ENE
30
ENE
20
ENE
25
ENE
20
NE
15
ENE
20
ENE
20
NE
15
NE
20
ENE
25
ENE
20
ENE
20
ENE
20
NE
15
NE
10
E
15
ENE
15
NE
Wind State
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
cross-off
cross-off
High Tide
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
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
rain showers
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:16
6:16
6:16
6:16
6:18
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:39
6:38
6:37
6:37
6:36
6:35
6:34
 mm
1
Temp °C
27
26
27
26
25
26
25
26
26
25
26
26
25
26
27
26
27
27
27
Feels °C
30
27
26
26
23
25
24
26
25
25
25
24
24
26
27
27
30
30
30
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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