Rockpiles Surf Break

Lat Long: 21.28° N 157.84° W

Rockpiles Surf Forecast and Surf Report

Issued: 7 am 10 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: Monday 14 Sep, 11PM (local time) - 1.5ft (0.4m), 21s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Thursday 17 Sep, 2PM (local time) - 6.5ft (2.0m), 9s period, ENE swell with 600 kJ wave energy.
  • Next surfable swell (1★+): Monday 14 Sep, 11PM (local time) - 1.5ft (0.4m), 21s 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 Monday (Sep 14) at 11PM. The primary swell is predicted to be 0.4m and 21s period with a secondary swell of 0.4m and 13s. 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 2.0m 9s and forecast to arrive on Thursday (Sep 17) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 9s period and expected on Sunday (Sep 13) at 2AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Mon 14th Sep)1.5ft (0.4m) 21s
Best Surf11PM (Mon 14th Sep)1.5ft (0.4m) 21s
Most Powerful 2PM (Thu 17th Sep)6.5ft (2.0m) 9s

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


The Lowdown

Well, folks, Rusty here. Let’s be straight with you. Looking at the next couple of weeks, it’s a bit of a slow burn for us. We’ve got a stretch of pretty quiet, gutless surf to start, and honestly, the first week is going to test your patience. There’s a serious lull at the beginning, with nothing worth paddling out for until at least the 22nd. It’s a long gap of flat, or near-flat, conditions, so if you’re Jonesing, maybe wax up the log for a flat day paddle, but don’t expect any waves. The good news is that forecasts can change, and it doesn’t usually stay this poor for long.

Rockpiles is our only real spot on the map for this period. The water temp is sitting at 80°F, which is bang on average for this time of year, so it’s still got that summer warmth in it.

Now, for the first week, it’s pretty bleak. From the 10th right through to the 16th, we’re looking at tiny swell with periods all over the shop. That early ENE windswell is weak, and the long-period SW pulses are just ghosts. The energy readings tell the story, with values dropping from moderate (686) down to weak (109). Thursday the 17th and Friday the 18th see a bump in size and energy – we get readings over 1000 (1029 and 1006) – with some 7ft ENE windswell, but the period is short and the wind is a strong cross-off at 40 km/h. That’s not a recipe for quality at a reef; it’s going to be lumpy and blown-out. Not worth the hassle in my book.

The real change comes around Thursday the 22nd. We finally start seeing some consistent ENE groundswell filling in. The morning of the 22nd has solid 6ft surf at 10 seconds, with the energy reading hitting 793. The wind is a more manageable moderate breeze from the ENE, which is cross-off for Rockpiles. That’s clean, lined-up surf.

Then the standout of the whole stretch, the one to circle on the calendar, is Wednesday the 23rd of September. The afternoon session looks like the pick of the bunch. We’re calling 5ft of E swell with a 10-second period, energy is pumping at 870, but the wind drops right out to a gentle breeze from the NE. That’s about as glassy as it gets for us. For a reef break like this, light winds and a solid, mid-period easterly swell is a beautiful thing. The direction is also right in the sweet spot for the break. This is the one. It's a standout, and while it's a week and a half away, it's definitely the one to plan for.

That window from the 22nd to the 23rd is your best bet. After that, it looks like it fades back into marginal, small SW groundswell with moderate to fresh cross-off winds again. It’s not going to be perfect, but it’s way more promising than the dead start. Go get some.

Rusty

Short Range Forecast

Some drizzle, heaviest during Thu morning. Warm (max 26°C on Thu morning, min 24°C on Fri night). Mainly fresh winds.

Days 4-6 Weather Summary

Mostly dry. Warm (max 27°C on Tue morning, min 24°C on Sun morning). Wind will be generally light.

Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
1
1
2
2
1
1
0
0
0
0
0
1
2
1
1
2
1
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
ENE
7
1.5
ENE
7
0.7
SW
16
0.7
SW
16
1.1
ENE
11
1.3
ENE
10
0.7
SW
15
0.5
SW
16
0.4
SSW
13
0.5
SW
15
0.4
SSW
15
0.5
SW
14
0.3
SW
23
0.5
SW
22
0.5
SW
21
0.7
SW
20
0.7
SW
19
0.8
SSW
19
0.9
SW
18
0.9
SSW
18
0.9
SW
17
Wave Graph
Metric surfscale
Energy kJ
231
225
268
261
297
308
242
124
68
107
84
100
86
227
224
392
384
470
455
541
429
Wind (km/h)
25
ENE
30
ENE
25
ENE
25
ENE
20
ENE
20
ENE
20
ENE
15
ENE
20
ENE
20
ENE
20
ENE
20
NE
20
ENE
25
NE
15
NE
20
ENE
25
ENE
20
ENE
25
ENE
35
ENE
40
ENE
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-off
cross-off
cross-off
cross-off
cross-off
High Tide
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
7:59AM0.57m
6:32PM0.25m
Low Tide
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
4:06PM0.24m
00:38AM0.13m
thunderstorm
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
<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
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:38
6:37
6:37
6:36
6:35
6:34
6:32
 mm
1
Temp °C
26
26
25
25
26
25
26
26
25
26
26
25
26
26
26
27
27
26
26
27
26
Feels °C
27
24
24
24
25
24
26
25
25
25
24
24
26
25
27
28
27
27
26
27
25
  • Map Icons:
  • Break
  • 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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