Rockpiles Surf Break

Lat Long: 21.28° N 157.84° W

Rockpiles Surf Forecast and Surf Report

Issued: 1 am 04 Sep 2026 (local time)

Forecast update in  hr  min

Today's Rockpiles sea temperature is
27.1°C
0.2° 

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


Rockpiles surf forecast from 4 Sep 2026:

  • Best quality surf: Wednesday 9 Sep, 5AM (local time) - 3ft (0.9m), 14s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Monday 7 Sep, 5PM (local time) - 13ft (4.0m), 14s period, SW swell with 6,058 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 9 Sep, 5AM (local time) - 3ft (0.9m), 14s 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 Wednesday (Sep 09) at 5AM. The primary swell is predicted to be 0.9m 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 4.0m 14s and forecast to arrive on Monday (Sep 07) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 9s period and expected on Wednesday (Sep 09) at 5AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Wed 9th Sep)3ft (0.9m) 14s
Best Surf 5AM (Wed 9th Sep)3ft (0.9m) 14s
Most Powerful 5PM (Mon 7th Sep)13ft (4.0m) 14s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s coming up for Rockpiles.

Right off the bat, the first couple of days have some waves, but they’re not really singing. The wind is a steady cross-off from the ENE, which keeps the surface clean, but the swell is a bit mixed up and the conditions are rated as marginal. The water temperature is 81°, which is pretty much spot on for this time of year, so no surprises there.

The real standout in this whole forecast lands on Monday, September 7th. That morning, we’ve got a solid 10ft swell from the SW, with a long period of 15 seconds – that’s proper groundswell energy. The combined energy is pumping hard at 6398, which is serious. This is a reef break, and that long-period SW groundswell is going to line up beautifully. The wind is a moderate cross-shore from the ESE, which is workable. This is definitely the best session on offer, but that swell is big, over 8ft, so this is for experienced surfers only. The morning is the window; the afternoon turns into a fresh cross-onshore, making it unsurfable.

After that, the swell drops back down. The rest of the first week and into the second week is a long run of consistent but not exciting surf. The swell hangs around in the 5ft to 8ft range from the ENE, with short periods around 7 to 9 seconds. The wind stays cross-off and clean, but these are short-period, wind-driven waves. The energy numbers are moderate, mostly in the 700 to 1400 range. It’s surfable, but nothing to get too worked up about.

Then we get a nice little pulse for the middle of the second week. On Wednesday, September 16th, the conditions turn excellent. The swell is a clean 7ft from the ENE with a period of 9 seconds, and the wind drops to a light breeze, making for glassy conditions. The combined energy is 1360, which is solid. This is a great window for experienced surfers, with clean, user-friendly waves. The morning and afternoon both look good.

The very end of the forecast, from Thursday, September 17th into the weekend, sees a shift. The swell drops right down to about 3ft, but it switches to a long-period SSW groundswell, with periods of 16 to 17 seconds and combined energy around 1000. The wind stays light and cross-off. This is a completely different wave – long, clean lines – but it’s small. It’ll be a good option for a longboard or a fun mid-length, but it’s not going to be a big-wave day.

So, to sum it up: The absolute best bet is the morning of Monday, September 7th, with big, powerful SW groundswell. The second best is the clean, solid conditions on Wednesday, September 16th. There’s a long stretch of smaller, short-period surf in between, but it’s still surfable with the clean cross-off wind.

Stay salty.

Rusty.

Short Range Forecast

Moderate rain (total 16mm), heaviest on Sun night. Warm (max 27°C on Sat afternoon, min 25°C on Fri night). Winds decreasing (strong winds from the ENE on Fri morning, light winds from the ENE by Sun night).

Days 4-6 Weather Summary

Moderate rain (total 11mm), heaviest on Mon night. Warm (max 28°C on Mon afternoon, min 25°C on Wed night). Winds decreasing (fresh winds from the S on Mon night, light winds from the E by Tue night).

Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
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
2
2
2
2
2
2
2
3
5
0
0
1
2
2
2
1
1
1
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
S
12
1.2
E
14
2.2
E
14
2.3
ENE
13
2.2
ENE
13
2.1
E
13
2.1
ENE
12
1.9
SSW
14
2.2
SSW
14
3
SW
15
4
SW
14
2
ENE
12
1.8
ENE
11
1.5
ENE
10
0.9
SSW
14
0.9
SSW
14
0.8
E
13
1.7
ENE
7
1.6
ENE
7
1.5
ENE
7
1.6
ENE
8
Wave Graph
Metric surfscale
Energy kJ
521
577
1977
1792
1616
1538
1240
1382
1960
4187
6058
1121
773
462
356
273
222
279
247
229
296
Wind (km/h)
40
ENE
35
ENE
30
ENE
30
ENE
30
ENE
25
ENE
35
ENE
25
ENE
25
ENE
20
ESE
30
SE
35
S
20
S
15
SSE
5
E
25
ENE
25
ENE
35
ENE
35
ENE
30
ENE
30
ENE
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-on
on
on
on
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
10:58AM0.66m
10:35PM0.19m
12:05PM0.69m
00:18AM0.21m
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
Low Tide
7:30PM0.17m
3:46AM0.09m
8:03PM0.13m
5:11AM0.08m
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
clear
clear
clear
clear
clear
part cloud
part cloud
mod rain
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
clear
part cloud
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:15
6:15
6:16
6:16
6:16
6:16
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:44
6:44
6:43
6:42
6:40
6:39
6:38
 mm
6
10
2
4
2
2
1
Temp °C
26
26
25
26
27
26
27
26
26
27
28
27
27
27
27
27
27
26
26
26
26
Feels °C
23
22
22
24
25
26
25
26
25
27
27
27
28
29
31
27
26
26
23
22
23
  • 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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